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Đề thi Hóa học cực hay có lời giải chi tiết cơ bản, nâng cao (Đề 20)

Điện phân 200 ml dung dịch X chứa FeCl3 0,1M và CuSO4 0,15M với dòng điện một chiều cường độ dòng điện I = 2A trong 4825 giây (điện cực trơ, hiệu suất 100%) thu được dung dịch Y có khối lượng ít hơn X là m gam. Giá trị của m là?

Hóa học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   Long before they can actually speak, babies pay special attention to the speech they hear around them. Within the first month of their lives, babies’ responses to the sound of the human voice will be different from their responses to other sorts of auditory stimuli. They will stop crying when they hear a person talking, but not if they hear a bell or the sound of a rattle. At first, the sounds that an infant notices might be only those words that receive the heaviest emphasis and that often occur at the ends of utterances. By the time they are six or seven weeks old, babies can detect the difference between syllables pronounced with rising and falling inflections. Very soon, these differences in adult stress and intonation can influence babies’ emotional states and behavior. Long before they develop actual language comprehension, babies can sense when an adult is playful or angry, attempting to initiate or terminate new behavior, and so on, merely on the basis of cues such as the rate, volume, and melody of adult speech.   Adults make it as easy as they can for babies to pick up a language by exaggerating such cues. One researcher observed babies and their mothers in six diverse cultures and found that, in all six languages, the mothers used simplified syntax, short utterances and nonsense sounds, and transformed certain sounds into baby talk. Other investigators have noted that when mothers talk to babies who are only a few months old, they exaggerate the pitch, loudness, and intensity of their words. They also exaggerate their facial expressions, hold vowels longer, and emphasize certain words.   More significant for language development than their response to general intonation is observation that tiny babies can make relatively fine distinctions between speech sounds. Other words, babies enter the world with the ability to make precisely those perceptual discriminations that are necessary if they are to acquire aural language.   Babies obviously derive pleasure from sound input, too: even as young as nine months they will listen to songs or stories, although the words themselves are beyond their understanding. For babies, language is a sensory-motor delight rather than the route to prosaic meaning that it often is for adults. The word “they” in the passage refer to _____________.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.    Although most universities in the United States are on a semester system, which offers classes in the fall and spring, some schools observe a quarter system comprised of fall, winter, spring, and summer quarters. The academic year, September to June, is divided into three quarters of eleven weeks each, beginning in September, January, and March; the summer quarter, June to August, is composed of shorter sessions of varying length.    There are several advantages and disadvantages to the quarter system. On the plus side, students who wish to complete their degrees in less than the customary four years may take advantage of the opportunity to study year round by enrolling in all four quarters. In addition, although most students begin their programs in the fall quarter, they may enter at the beginning of any other quarters. Finally, since the physical facilities are kept in operation year round, the resources are used effectively to serve the greatest number of students. But there are several disadvantages as well. Many faculties complain that eleven-week term is simply not enough for them to cover the material required by most college courses. Students also find it difficult to complete the assignments in such a short period of time.    In order to combine the advantages of the quarter system with those of the semester system some colleges and universities have instituted a three-term trimester system. In fourteen weeks, faculty and students have more time to cover material and finish course requirements, but the additional term provides options for admission during the year and accelerates the degree programs for those students who wish to graduate early. The word “them” in paragraph 2 refers to..................

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   Long before they can actually speak, babies pay special attention to the speech they hear around them. Within the first month of their lives, babies’ responses to the sound of the human voice will be different from their responses to other sorts of auditory stimuli. They will stop crying when they hear a person talking, but not if they hear a bell or the sound of a rattle. At first, the sounds that an infant notices might be only those words that receive the heaviest emphasis and that often occur at the ends of utterances. By the time they are six or seven weeks old, babies can detect the difference between syllables pronounced with rising and falling inflections. Very soon, these differences in adult stress and intonation can influence babies’ emotional states and behavior. Long before they develop actual language comprehension, babies can sense when an adult is playful or angry, attempting to initiate or terminate new behavior, and so on, merely on the basis of cues such as the rate, volume, and melody of adult speech.   Adults make it as easy as they can for babies to pick up a language by exaggerating such cues. One researcher observed babies and their mothers in six diverse cultures and found that, in all six languages, the mothers used simplified syntax, short utterances and nonsense sounds, and transformed certain sounds into baby talk. Other investigators have noted that when mothers talk to babies who are only a few months old, they exaggerate the pitch, loudness, and intensity of their words. They also exaggerate their facial expressions, hold vowels longer, and emphasize certain words.   More significant for language development than their response to general intonation is observation that tiny babies can make relatively fine distinctions between speech sounds. Other words, babies enter the world with the ability to make precisely those perceptual discriminations that are necessary if they are to acquire aural language.   Babies obviously derive pleasure from sound input, too: even as young as nine months they will listen to songs or stories, although the words themselves are beyond their understanding. For babies, language is a sensory-motor delight rather than the route to prosaic meaning that it often is for adults. Why does the author mention a bell and a rattle in paragraph 1?

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Ở người, bệnh điếc bẩm sinh do alen a nằm trên nhiễm sắc thể thường quy định, alen A quy định tai nghe bình thường; bệnh mù màu do alen m nằm trên vùng không tương đồng của nhiễm sắc thể X quy định, alen M quy định nhìn màu bình thường. Một cặp vợ chồng có kiểu hình bình thường. Bên vợ có anh trai bị mù màu, em gái bị điếc bẩm sinh; bên chồng có mẹ bị điếc bẩm sinh. Những người còn lại trong hai gia đình trên đều có kiểu hình bình thường. Xác suất cặp vợ chồng trên sinh con đầu lòng là gái và không mang alen gây bệnh trên là

Sinh học Tốt nghiệp THPT
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Đề thi Hóa học cực hay có lời giải chi tiết cơ bản, nâng cao (Đề 20)

X là hỗn hợp chứa 1 axit, 1 ancol, 1 andehit đều đơn chức, mạch hở có khả năng tác dụng với Br2 trong CCl4 và đều có ít hơn 4 nguyên tử C trong phân tử. Đốt cháy 0,1 mol X cần 0,34 mol O2. Mặt khác, cho 0,1 mol X vào dung dịch NaOH dư thì thấy có 0,02 mol NaOH phản ứng. Nếu cho 14,8 gam X vào dung dịch nước Br2 (dư) thì số mol Br2 phản ứng tối đa là

Hóa học Tốt nghiệp THPT
Xem chi tiết 595 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.   Long before they can actually speak, babies pay special attention to the speech they hear around them. Within the first month of their lives, babies’ responses to the sound of the human voice will be different from their responses to other sorts of auditory stimuli. They will stop crying when they hear a person talking, but not if they hear a bell or the sound of a rattle. At first, the sounds that an infant notices might be only those words that receive the heaviest emphasis and that often occur at the ends of utterances. By the time they are six or seven weeks old, babies can detect the difference between syllables pronounced with rising and falling inflections. Very soon, these differences in adult stress and intonation can influence babies’ emotional states and behavior. Long before they develop actual language comprehension, babies can sense when an adult is playful or angry, attempting to initiate or terminate new behavior, and so on, merely on the basis of cues such as the rate, volume, and melody of adult speech.   Adults make it as easy as they can for babies to pick up a language by exaggerating such cues. One researcher observed babies and their mothers in six diverse cultures and found that, in all six languages, the mothers used simplified syntax, short utterances and nonsense sounds, and transformed certain sounds into baby talk. Other investigators have noted that when mothers talk to babies who are only a few months old, they exaggerate the pitch, loudness, and intensity of their words. They also exaggerate their facial expressions, hold vowels longer, and emphasize certain words.   More significant for language development than their response to general intonation is observation that tiny babies can make relatively fine distinctions between speech sounds. Other words, babies enter the world with the ability to make precisely those perceptual discriminations that are necessary if they are to acquire aural language.   Babies obviously derive pleasure from sound input, too: even as young as nine months they will listen to songs or stories, although the words themselves are beyond their understanding. For babies, language is a sensory-motor delight rather than the route to prosaic meaning that it often is for adults. What does the passage mainly discuss?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 349 lượt xem 6 năm trước
Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.    Although most universities in the United States are on a semester system, which offers classes in the fall and spring, some schools observe a quarter system comprised of fall, winter, spring, and summer quarters. The academic year, September to June, is divided into three quarters of eleven weeks each, beginning in September, January, and March; the summer quarter, June to August, is composed of shorter sessions of varying length.    There are several advantages and disadvantages to the quarter system. On the plus side, students who wish to complete their degrees in less than the customary four years may take advantage of the opportunity to study year round by enrolling in all four quarters. In addition, although most students begin their programs in the fall quarter, they may enter at the beginning of any other quarters. Finally, since the physical facilities are kept in operation year round, the resources are used effectively to serve the greatest number of students. But there are several disadvantages as well. Many faculties complain that eleven-week term is simply not enough for them to cover the material required by most college courses. Students also find it difficult to complete the assignments in such a short period of time.    In order to combine the advantages of the quarter system with those of the semester system some colleges and universities have instituted a three-term trimester system. In fourteen weeks, faculty and students have more time to cover material and finish course requirements, but the additional term provides options for admission during the year and accelerates the degree programs for those students who wish to graduate early. The word “customary” in paragraph 2 could best be replaced by...................           

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề ôn tập Hóa Học 10 có lời giải cực hay (Đề số 12)

Phản ứng nào sau đây không đúng ?

Hóa học Lớp 10
Xem chi tiết 718 lượt xem 6 năm trước
20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Ở một loài (2n = 6), trên mỗi cặp nhiễm sắc thể thường xét hai cặp gen, mỗi gen gồm 2 alen; trên cặp NST giới tính xét một gen có 3 alen thuộc vùng tương đồng. Các con đực (XY) bị đột biến thể một trong quần thể có tối đa bao nhiêu loại kiểu gen nếu giả sử các thể một này đều không ảnh hưởng đến sức sống và giới tính đực được quyết định bởi NST Y?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) The word “lifeliky” in the passage is closest in meaning to “_____________”

Tiếng Anh Tốt nghiệp THPT
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TÌM CHẤT

Hợp chất hữu cơ X (chứa C, H, O) trong đó oxi chiếm 50% về khối lượng. Từ chất X thực hiện chuyển hoá sau: Phát biểu nào sau đây là không đúng

Hóa học Tốt nghiệp THPT
Xem chi tiết 9.6 K lượt xem 5 năm trước
Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.    Although most universities in the United States are on a semester system, which offers classes in the fall and spring, some schools observe a quarter system comprised of fall, winter, spring, and summer quarters. The academic year, September to June, is divided into three quarters of eleven weeks each, beginning in September, January, and March; the summer quarter, June to August, is composed of shorter sessions of varying length.    There are several advantages and disadvantages to the quarter system. On the plus side, students who wish to complete their degrees in less than the customary four years may take advantage of the opportunity to study year round by enrolling in all four quarters. In addition, although most students begin their programs in the fall quarter, they may enter at the beginning of any other quarters. Finally, since the physical facilities are kept in operation year round, the resources are used effectively to serve the greatest number of students. But there are several disadvantages as well. Many faculties complain that eleven-week term is simply not enough for them to cover the material required by most college courses. Students also find it difficult to complete the assignments in such a short period of time.    In order to combine the advantages of the quarter system with those of the semester system some colleges and universities have instituted a three-term trimester system. In fourteen weeks, faculty and students have more time to cover material and finish course requirements, but the additional term provides options for admission during the year and accelerates the degree programs for those students who wish to graduate early. How many terms are there in a quarter system?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.1 K lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) Matthew Brady was well-known for _____________

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Khi nói về mối quan hệ cạnh tranh giữa các cá thể cùng loài, điều nào sau đây là đúng?

Sinh học Tốt nghiệp THPT
Xem chi tiết 329 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) As mentioned in the passage, photography can _____________

Tiếng Anh Tốt nghiệp THPT
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TÌM CHẤT

Cho sơ đồ chuyển đổi sau (E, Q, X, Y, Z là hợp chất hữu cơ, mỗi mũi tên biểu thị một phản ứng hoá học) : Công thức của E, Q, X, Y, Z phù hợp với sơ đồ trên lần lượt là 

Hóa học Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.    Although most universities in the United States are on a semester system, which offers classes in the fall and spring, some schools observe a quarter system comprised of fall, winter, spring, and summer quarters. The academic year, September to June, is divided into three quarters of eleven weeks each, beginning in September, January, and March; the summer quarter, June to August, is composed of shorter sessions of varying length.    There are several advantages and disadvantages to the quarter system. On the plus side, students who wish to complete their degrees in less than the customary four years may take advantage of the opportunity to study year round by enrolling in all four quarters. In addition, although most students begin their programs in the fall quarter, they may enter at the beginning of any other quarters. Finally, since the physical facilities are kept in operation year round, the resources are used effectively to serve the greatest number of students. But there are several disadvantages as well. Many faculties complain that eleven-week term is simply not enough for them to cover the material required by most college courses. Students also find it difficult to complete the assignments in such a short period of time.    In order to combine the advantages of the quarter system with those of the semester system some colleges and universities have instituted a three-term trimester system. In fourteen weeks, faculty and students have more time to cover material and finish course requirements, but the additional term provides options for admission during the year and accelerates the degree programs for those students who wish to graduate early. A semester system.................. 

Tiếng Anh Tốt nghiệp THPT
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Đề thi Hóa học cực hay có lời giải chi tiết cơ bản, nâng cao (Đề 20)

Cho các phát biểu sau: (a). Thép là hợp kim của sắt chứa từ 2-5% khối lượng cacbon. (b). Bột nhôm trộn với bột sắt(III) oxit dùng để hàn đường ray bằng phản ứng nhiệt nhôm. (c). Dùng Na2CO3 để làm mất tính cứng tạm thời và tính cứng vĩnh cửu của nước. (d). Dùng bột lưu huỳnh để xử lí thủy ngân rơi vãi khi nhiệt kế bị vỡ. (e). Khi làm thí nghiệm kim loại đồng tác dụng với dung dịch HNO3, người ta nút ống nghiệm bằng bông tẩm dung dịch kiềm. Số phát biểu đúng là

Hóa học Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Phát biểu nào sau đây là không đúng khi nói về đặc trưng về thành phần loài của quần xã?

Sinh học Tốt nghiệp THPT
Xem chi tiết 469 lượt xem 6 năm trước
Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) The first photograph was taken with _____________

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20 Bộ đề ôn tập Hóa Học 10 có lời giải cực hay (Đề số 12)

Cho 10,2 gam hỗn hợp X gồm Al và Mg tác dụng với dung dịch H2SO4 loãng, dư thu được 11,2 lít khí hiđro (đktc). Cô cạn dung dịch sau phản ứng, khối lượng muối khan thu được là

Hóa học Lớp 10
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30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 8)

* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.   In addition to improved physical health, sport plays a primarily positive role in youth development, including improved academic achievement, higher self- esteem, fewer behavioural problems, and better psychosocial development. Many studies focus on the effects of sport on the five “C’ s” - competence, confidence, connections, character, and caring The many facets of playing sport - the discipline of training, learning teamwork, following the leadership of coaches and captains, learning to lose - provide lifelong skills for athletes.   The literature on youth sport stresses the positive effects of participation in learning the important life skills of goal setting and time management combined with enjoyment; the development of a strong sense of morality; and the development of an appreciation of diversity. Studies have shown that children and youth participating in sport, when compared to peers who do not play sport, exhibit higher grades, expectations, and attainment; greater personal confidence and self-esteem; greater connections with school — that is, greater attachment and support from adults; stronger peer relationships; more academically oriented friends; greater family attachment and more frequent interactions with parents; more restraint in avoiding risky behaviour; and greater involvement in volunteer work.   Sport provides opportunities for children and youth to engage in valuable and positive relationships with adults. Thus, it is a missed opportunity for children who are “gated” - or not included in sport - during early stages of childhood because they are less well behaved than other children. These children are being prevented from participating in the very thing that could help them learn to control and regulate their behaviour. Sport provides an opportunity for children to safely navigate and negotiate between right and wrong as they learn to interact with peers and adults. Research by Taliaferro et al. suggests that playing sport can even protect against suicide risk in youth. Compared to nonathletes, male athletes exhibit lower levels of hopelessness and suicidal ideation. Young males involved in multiple sports seem to gamer even more protection in this regard. Similar results were found for girls. Research on the role of exercise in adults confirms that it improves mood and alleviates many forms of depression. Bartko and Eccles found that youth who are highly involved in sport are more “psychologically resilient,” that is, better able to recover from problems. Eccles et al. found that sport participation protects young athletes against social isolation. (Adaptedfrom: Sport is a way of life, Sun Star Baguio, Jan 10, 2017)  Whose study suggests that sport players are more able to feel better after unpleasant events than others?      

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.    Although most universities in the United States are on a semester system, which offers classes in the fall and spring, some schools observe a quarter system comprised of fall, winter, spring, and summer quarters. The academic year, September to June, is divided into three quarters of eleven weeks each, beginning in September, January, and March; the summer quarter, June to August, is composed of shorter sessions of varying length.    There are several advantages and disadvantages to the quarter system. On the plus side, students who wish to complete their degrees in less than the customary four years may take advantage of the opportunity to study year round by enrolling in all four quarters. In addition, although most students begin their programs in the fall quarter, they may enter at the beginning of any other quarters. Finally, since the physical facilities are kept in operation year round, the resources are used effectively to serve the greatest number of students. But there are several disadvantages as well. Many faculties complain that eleven-week term is simply not enough for them to cover the material required by most college courses. Students also find it difficult to complete the assignments in such a short period of time.    In order to combine the advantages of the quarter system with those of the semester system some colleges and universities have instituted a three-term trimester system. In fourteen weeks, faculty and students have more time to cover material and finish course requirements, but the additional term provides options for admission during the year and accelerates the degree programs for those students who wish to graduate early. Which of the following would be the best title for this passage?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) The latest invention mentioned in the passage is the invention of _____________

Tiếng Anh Tốt nghiệp THPT
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Đề thi Hóa học cực hay có lời giải chi tiết cơ bản, nâng cao (Đề 20)

Cho các phát biểu sau: (1). Phenol tan vô hạn trong nước ở 660C. (2). Phenol có lực axit mạnh hơn ancol etylic. (3). Phản ứng thế vào benzen dễ hơn phản ứng thế vào nhân thơm của phenol. (4). Phenol tan tốt trong etanol. (5). Phenol làm quỳ tím hóa đỏ. (6). Phenol được dùng để điều chế dược phẩm, phẩm nhuộm, thuốc nổ … Có bao nhiêu phát biểu đúng?

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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Phát biểu nào sau đây đúng về dòng năng lượng trong hệ sinh thái?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) The word “this” in the passage refers to the _____________

Tiếng Anh Tốt nghiệp THPT
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TÌM CHẤT

Hợp chất hữu cơ mạch hở X có công thức phân tử C­5­H­10­O. Chất X không phản ứng với Na, thỏa mãn sơ đồ chuyển hóa sau: X→H2Ni,toY→+CH3COOHH2SO4,ĐẶC Este có mùi chuối chín. Tên của X là

Hóa học Tốt nghiệp THPT
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Đề thi Hóa học cực hay có lời giải chi tiết cơ bản, nâng cao (Đề 20)

Hỗn hợp X gồm andehit axetic, axit butiric, etilen glicol, benzen, stiren, etanol ( trong đó etanol chiếm 24,89% về khối lượng hỗn hợp). Hóa hơi 9,4g X, thu được thể tích hơi bằng thể tích của 4,8g oxi ở cùng điều kiện . Mặt khác , đốt cháy hoàn toàn 9,4g hỗn hợp X thu được V lit CO2 (dktc) và 8,28g H2O. Hấp thụ V lit khí CO2 (dktc) vào 400 ml dung dịch Ba(OH)2 1M thu được m gam kết tủa. Giá trị của m là

Hóa học Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Đối với loài ngẫu phối, một alen lặn gây hại nằm trên NST thường có thể bị đào thải hoàn toàn ra khỏi quần thể dưới tác động của nhân tố nào sau đây?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

Read the following passage and mark the letter A, 8, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.   In 1826, a Frenchman named Niepce needed pictures for his business. He was not a good artist, so he invented a very simple camera. He put it in a window of his house and took a picture of his yard. That was the first photograph.   The next important date in the history of photography was 1837. That year, Daguerre, another Frenchman, took a picture of his studio. He used a new kind of camera and a different process. In his pictures, you could see everything clearly, even the smallest details. This kind of photograph was called a daguerreotype.   Soon, other people began to use Daguerre’s process. Travelers brought back daguerreotypes from all around the world. People photographed famous buildings, cities, and mountains.   In about 1840, the process was improved. Then photographers could take pictures of people and moving things. The process was not simple and photographers had to carry lots of film and processing equipment. However, this did not stop photographers, especially in the United States. After 1840, daguerreotype artists were popular in most cities.   Matthew Brady was one well-known American photographer. He took many portraits of famous people. The portraits were unusual because they were lifelike and full of personality. Brady was also the first person to take pictures of a war. His 1862 Civil War pictures showed dead soldiers and ruined cities. They made the war seem more real and more terrible.   In the 1880s, new inventions began to change photography. Photographers could buy film ready-made in rolls, instead of having to make the film themselves. Also, they did not have to process the film immediately. They could bring it back to their studios and develop it later. They did not have to carry lots of equipment. And finally, the invention of the small handheld camera made photography less expensive.   With a small camera, anyone could be a photographer. People began to use cameras just for fun. They took pictures of their families, friends, and favorite places. They called these pictures “snapshots”.   Documentary photographs became popular in newspapers in the 1890s. Soon magazines and books also used them. These pictures showed true events and people. They were much more real than drawings.   Some people began to think of photography as a form of art. They thought that photography could do more than show the real world. It could also show ideas and feelings, like other art forms. (From "Reading Power” by Beatrice S. Mikulecky and Linda Jeffries) Which of the following could best serve as the title of the passage?

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Đặc điểm về cấu tạo cơ thể xuất hiện sau cùng và chỉ có ở nhánh tiến hóa của loài người mà không có ở nhánh tiến hóa hình thành nên các loài khác là:

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

 Read the following passage and mark the letter A, B, 0, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 23 HERE ARE TIPS THAT HELP SUCCEED IN YOUR JOB INTERVIEW   Always arrive early. If you do not know (23) _____________ the organization is located, call for exact directions (24) _____________ advance. Leave some extra time for any traffic, parking, or unexpected events. If you are running late, call right away and let someone know. The best time to arrive is approximately 5-10 minutes early. Give yourself the time to read your resume one more time, to catch your breath, and to be ready for the interview. Once you are at the office, treat everyone you encounter with respect. Be (25) _____________ to everyone as soon as you walk in the door.   Wear a professional business suit. This point should be emphasized enough. First (26) ___________ are extremely important in the interview process. Women should (27) ___________ wearing too much jewelry or make-up. Men should avoid flashy suits or wearing too much perfume. It is also important that you feel comfortable. While a suit is the standard interview attire in a business environment, if you think it is an informal environment, call before and ask. Regardless, you can never be overdressed if you are wearing a tailored suit.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử thpt quốc gia 2019 môn tiếng anh (Đề số 9)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35.    Education is more important today than ever before. It helps people (31) .................. the skills they need for such everyday (32) .................. as reading a newspaper or managing their money. It also gives them the specialized training they may need to prepare for a job or career. For example, a person must (33) .................. certain educational requirements and obtain a (34) .................. or certificate before he can practice law or medicine. Many fields, like computer operation or police work, require satisfactory completion of special training courses.    Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and affect the lives of more and more people. Education can help a person understand these changes and provide him (35) .................. the skills for adjusting to them. Điền vào ô 35

Tiếng Anh Tốt nghiệp THPT
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TÌM CHẤT

Hợp chất X có công thức C8H14O4. Từ X thực hiện các phản ứng (theo đúng tỉ lệ mol): (a) X + 2NaOH ® X1 + X2 + H2O (b) X1 + H2SO4 ® X3 + Na2SO4 (c) nX3 + nX4 ® nilon-6,6 + 2nH2O (d) 2X2 + X3 ® X5 + 2H2O Phân tử khối của X5 là

Hóa học Tốt nghiệp THPT
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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 3)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. We couldn’t have been able to go to the final match without the coach’s flexible strategies

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30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 8)

* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.   In addition to improved physical health, sport plays a primarily positive role in youth development, including improved academic achievement, higher self- esteem, fewer behavioural problems, and better psychosocial development. Many studies focus on the effects of sport on the five “C’ s” - competence, confidence, connections, character, and caring The many facets of playing sport - the discipline of training, learning teamwork, following the leadership of coaches and captains, learning to lose - provide lifelong skills for athletes.   The literature on youth sport stresses the positive effects of participation in learning the important life skills of goal setting and time management combined with enjoyment; the development of a strong sense of morality; and the development of an appreciation of diversity. Studies have shown that children and youth participating in sport, when compared to peers who do not play sport, exhibit higher grades, expectations, and attainment; greater personal confidence and self-esteem; greater connections with school — that is, greater attachment and support from adults; stronger peer relationships; more academically oriented friends; greater family attachment and more frequent interactions with parents; more restraint in avoiding risky behaviour; and greater involvement in volunteer work.   Sport provides opportunities for children and youth to engage in valuable and positive relationships with adults. Thus, it is a missed opportunity for children who are “gated” - or not included in sport - during early stages of childhood because they are less well behaved than other children. These children are being prevented from participating in the very thing that could help them learn to control and regulate their behaviour. Sport provides an opportunity for children to safely navigate and negotiate between right and wrong as they learn to interact with peers and adults. Research by Taliaferro et al. suggests that playing sport can even protect against suicide risk in youth. Compared to nonathletes, male athletes exhibit lower levels of hopelessness and suicidal ideation. Young males involved in multiple sports seem to gamer even more protection in this regard. Similar results were found for girls. Research on the role of exercise in adults confirms that it improves mood and alleviates many forms of depression. Bartko and Eccles found that youth who are highly involved in sport are more “psychologically resilient,” that is, better able to recover from problems. Eccles et al. found that sport participation protects young athletes against social isolation. (Adaptedfrom: Sport is a way of life, Sun Star Baguio, Jan 10, 2017)    Which of the followings is NOT prevented as a result of playing sports?    

Tiếng Anh Tốt nghiệp THPT
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Loại phân tử nào sau đây không có chứa liên kết hiđrô?

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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

 Read the following passage and mark the letter A, B, 0, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 26 HERE ARE TIPS THAT HELP SUCCEED IN YOUR JOB INTERVIEW   Always arrive early. If you do not know (23) _____________ the organization is located, call for exact directions (24) _____________ advance. Leave some extra time for any traffic, parking, or unexpected events. If you are running late, call right away and let someone know. The best time to arrive is approximately 5-10 minutes early. Give yourself the time to read your resume one more time, to catch your breath, and to be ready for the interview. Once you are at the office, treat everyone you encounter with respect. Be (25) _____________ to everyone as soon as you walk in the door.   Wear a professional business suit. This point should be emphasized enough. First (26) ___________ are extremely important in the interview process. Women should (27) ___________ wearing too much jewelry or make-up. Men should avoid flashy suits or wearing too much perfume. It is also important that you feel comfortable. While a suit is the standard interview attire in a business environment, if you think it is an informal environment, call before and ask. Regardless, you can never be overdressed if you are wearing a tailored suit.

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Đề thi thử THPTQG năm 2019 chuẩn cấu trúc của bộ giáo dục có đáp án (Đề số 3)

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. People say that products are sold in this market at suitable prices

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20 Bộ đề ôn tập Hóa Học 10 có lời giải cực hay (Đề số 12)

Đốt cháy hoàn toàn 8,9 gam hỗn hợp X gồm Mg và Zn bằng khí O2 (vừa đủ), thu được 12,1 gam hỗn hợp oxit. Thể tích oxi (đktc) tham gia phản ứng là :

Hóa học Lớp 10
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20 Bộ đề Chinh phục điểm 9-10 môn Sinh Học cực hay có lời giải (Đề số 7)

Xét một cặp vợ chồng, vợ bình thường và chồng bị mù màu. Cặp vợ chồng này sinh được con trai đầu lòng vừa bị mù màu, vừa mắc hội chứng Claiphentơ. Cho biết quá trình giảm phân ở bố và mẹ không xảy ra đột biến gen và cấu trúc nhiễm sắc thể. Phát biểu nào sau đây là không đúng?

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Tổng hợp đề thi thử tiếng anh thpt quốc gia (Đề số 25)

 Read the following passage and mark the letter A, B, 0, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 23 HERE ARE TIPS THAT HELP SUCCEED IN YOUR JOB INTERVIEW   Always arrive early. If you do not know (23) _____________ the organization is located, call for exact directions (24) _____________ advance. Leave some extra time for any traffic, parking, or unexpected events. If you are running late, call right away and let someone know. The best time to arrive is approximately 5-10 minutes early. Give yourself the time to read your resume one more time, to catch your breath, and to be ready for the interview. Once you are at the office, treat everyone you encounter with respect. Be (25) _____________ to everyone as soon as you walk in the door.   Wear a professional business suit. This point should be emphasized enough. First (26) ___________ are extremely important in the interview process. Women should (27) ___________ wearing too much jewelry or make-up. Men should avoid flashy suits or wearing too much perfume. It is also important that you feel comfortable. While a suit is the standard interview attire in a business environment, if you think it is an informal environment, call before and ask. Regardless, you can never be overdressed if you are wearing a tailored suit.

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Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions. Father said “Albert, if you break your promise, nobody will respect you.”

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Cho sơ đồ sau Công thức cấu tạo của X là

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Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. The boy lost several of his fingers because of firecrackers. The doctors are operating on him

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 Read the following passage and mark the letter A, B, 0, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27. Fill in the appropriate word in question 24 HERE ARE TIPS THAT HELP SUCCEED IN YOUR JOB INTERVIEW   Always arrive early. If you do not know (23) _____________ the organization is located, call for exact directions (24) _____________ advance. Leave some extra time for any traffic, parking, or unexpected events. If you are running late, call right away and let someone know. The best time to arrive is approximately 5-10 minutes early. Give yourself the time to read your resume one more time, to catch your breath, and to be ready for the interview. Once you are at the office, treat everyone you encounter with respect. Be (25) _____________ to everyone as soon as you walk in the door.   Wear a professional business suit. This point should be emphasized enough. First (26) ___________ are extremely important in the interview process. Women should (27) ___________ wearing too much jewelry or make-up. Men should avoid flashy suits or wearing too much perfume. It is also important that you feel comfortable. While a suit is the standard interview attire in a business environment, if you think it is an informal environment, call before and ask. Regardless, you can never be overdressed if you are wearing a tailored suit.

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Ở một loài cá, tiến hành một phép lai giữa cá vảy đỏ, to thuần chủng với cá vảy trắng, nhỏ được F1 đồng loạt có kiểu hình vảy đỏ, to. Cho con cái F1 lai phân tích thu được Fb như sau: Ở giới đực: 121 vảy trắng, nhỏ: 118 vảy trắng, to: 42 vảy đỏ, nhỏ: 39 vảy đỏ, to; Ở giới cái: 243 vảy trắng, nhỏ: 82 vảy đỏ, nhỏ. Biết ở loài này con cái là thể dị giao, con đực là thể đồng giao. Nếu cho chỉ chọn những con cá vảy trắng, nhỏ ở Fb đem tạp giao thì tỉ lệ cá cái có kiểu hình vảy trắng, nhỏ không chứa các alen trội là bao nhiêu?

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* Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 43 to 50.   In addition to improved physical health, sport plays a primarily positive role in youth development, including improved academic achievement, higher self- esteem, fewer behavioural problems, and better psychosocial development. Many studies focus on the effects of sport on the five “C’ s” - competence, confidence, connections, character, and caring The many facets of playing sport - the discipline of training, learning teamwork, following the leadership of coaches and captains, learning to lose - provide lifelong skills for athletes.   The literature on youth sport stresses the positive effects of participation in learning the important life skills of goal setting and time management combined with enjoyment; the development of a strong sense of morality; and the development of an appreciation of diversity. Studies have shown that children and youth participating in sport, when compared to peers who do not play sport, exhibit higher grades, expectations, and attainment; greater personal confidence and self-esteem; greater connections with school — that is, greater attachment and support from adults; stronger peer relationships; more academically oriented friends; greater family attachment and more frequent interactions with parents; more restraint in avoiding risky behaviour; and greater involvement in volunteer work.   Sport provides opportunities for children and youth to engage in valuable and positive relationships with adults. Thus, it is a missed opportunity for children who are “gated” - or not included in sport - during early stages of childhood because they are less well behaved than other children. These children are being prevented from participating in the very thing that could help them learn to control and regulate their behaviour. Sport provides an opportunity for children to safely navigate and negotiate between right and wrong as they learn to interact with peers and adults. Research by Taliaferro et al. suggests that playing sport can even protect against suicide risk in youth. Compared to nonathletes, male athletes exhibit lower levels of hopelessness and suicidal ideation. Young males involved in multiple sports seem to gamer even more protection in this regard. Similar results were found for girls. Research on the role of exercise in adults confirms that it improves mood and alleviates many forms of depression. Bartko and Eccles found that youth who are highly involved in sport are more “psychologically resilient,” that is, better able to recover from problems. Eccles et al. found that sport participation protects young athletes against social isolation. (Adaptedfrom: Sport is a way of life, Sun Star Baguio, Jan 10, 2017)    What does the word “gated” in the third paragraph mean?    

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