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Chất dẻo

Polime nào sau đây không phải là thành phần chính của chất dẻo

Hóa học Lớp 12
Xem chi tiết 2.1 K lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Hỗn hợp X gồm anđehit fomic, anđehit oxalic, axit axetic, etylen glicol, glixerol. Lấy 4,52 gam X đốt cháy hoàn toàn rồi cho sản phẩm đi qua bình 1 đựng H2SO4 (đặc, dư), bình 2 đựng 600 ml dung dịch BaOH2 0,2M  thấy bình 1 tăng 2,88 gam, bình 2 xuất hiện m gam kết tủa. Xác định m?

Hóa học Lớp 12
Xem chi tiết 2.7 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 14)

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 2.2 K lượt xem 6 năm trước
Chất dẻo

Polime nào dưới đây không dùng làm chất dẻo?

Hóa học Lớp 12
Xem chi tiết 6.9 K lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P2)

Để 4,2 gam sắt trong không khí một thời gian thu được 5,32 gam hỗn hợp X gồm sắt và các oxit của nó. Để hòa tan hết X cần 200 ml dung dịch HNO3 xM, thấy sinh ra 0,448 lít khí NO (đktc, sản phẩm khử duy nhất) và dung dịch Y. Vậy giá trị của x là

Hóa học Lớp 12
Xem chi tiết 724 lượt xem 6 năm trước
PHÂN DẠNG CÂU HỎI VÀ VÍ DỤ MINH HỌA

Cho dãy các chất: etyl axetat, anilin, ancol etylic, axit acrylic, phenol, phenylamoni clorua, ancol benzylic, p-crezol, cumen. Số chất trong dãy tác dụng được với dung dịch NaOH là

Hóa học Lớp 12
Xem chi tiết 6.7 K lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P2)

Đốt 4,2 gam sắt trong không khí thu được 5,32 gam hỗn hợp X gồm sắt và các oxit sắt. Hòa tan hết X bằng 200 ml dung dịch HNO3 a mol/l sinh ra 0,448 lít NO (ở đktc, sản phẩm khử duy nhất của N+5). Giá trị của a là

Hóa học Lớp 12
Xem chi tiết 4.3 K lượt xem 6 năm trước
Chất dẻo

Polime nào sau đây không dùng để chế tạo chất dẻo?

Hóa học Lớp 12
Xem chi tiết 11.4 K lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Cho 28,8 gam hỗn hợp X gồm propinal, glucozơ, fructozơ tác dụng với lượng dư dung dịch AgNO3 trong NH3 thì thu được 103,6 gam chất rắn. Phần trăm khối lượng của propinal trong X là

Hóa học Lớp 12
Xem chi tiết 2.5 K lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P2)

Cho một luồng khí CO đi qua ống sứ đựng m gam Fe2O3 nung nóng. Sau một thời gian thu được 10,44 gam chất rắn X gồm Fe, FeO, Fe2O3 và Fe3O4. Hòa tan hết X trong dung dịch HNO3 đặc, nóng  thu được 4,368 lít NO2 (sản phẩm khử duy nhất ở đktc). Tính m ?

Hóa học Lớp 12
Xem chi tiết 579 lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe writer seems to agree that___________

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 345 lượt xem 6 năm trước
Tổng hợp đề ôn tập thi THPTQG môn Sinh Học có đáp án (Đề số 19)

Quần thể có cấu trúc di truyền nào sau đây đã đạt trạng thái cân bằng Hacdi – Vanbec?

Sinh học Tốt nghiệp THPT
Xem chi tiết 505 lượt xem 6 năm trước
Chất dẻo

Dãy gồm tất cả các chất đều là chất dẻo là

Hóa học Lớp 12
Xem chi tiết 27.7 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe passage is organized by ___________________________

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 294 lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P2)

Để m gam phôi bào sắt ngoài không khí,sau một thời gian Fe bị oxi hóa thành hỗn hợp X gồm 4 chất rắn có khối lượng 27,2 gam. Hòa tan vừa hết X trong 300 ml dung dịch HCl nồng độ a mol/lit thấy thoát ra 3,36 lít H2(đktc) và dung dịch Y. Cho tiếp dung dịch HNO3 tới dư vào dung dịch Y được dung dịch Z chứa hỗn hợp FeCl3, Fe(NO3)3, HNO3 dư và có 2,24 lít NO duy nhất thoát ra (đktc). Giá trị của m và a lần lượt là:

Hóa học Lớp 12
Xem chi tiết 1 K lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Hỗn hợp X gồm vinyl axetat, metyl axetat và etyl fomat. Đốt cháy hoàn toàn 3,08 gam X, thu được 2,16 gam H2O. Phần trăm số mol của vinyl axetat trong X là :

Hóa học Lớp 12
Xem chi tiết 1.3 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe passage supports which of the following conclusions?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 368 lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P2)

Hòa tan hết m gam hỗn hợp X gồm FeO, Fe2O3, Fe3O4 bằng HNO3 đặc nóng thu được 4,48 lit khí NO2 (đktc). Cô cạn dung dịch sau phản ứng thu được 145,2 gam muối khan giá trị của m là:

Hóa học Lớp 12
Xem chi tiết 1.5 K lượt xem 6 năm trước
PHÂN DẠNG CÂU HỎI VÀ VÍ DỤ MINH HỌA

Cho các chất sau: etyl axetat, etanol, axit acrylic, phenol, anilin, phenyl amoniclorua, ancol benzylic, p-crezol, m-xilen. Trong các chất trên, số chất phản ứng với NaOH là

Hóa học Lớp 12
Xem chi tiết 2.3 K lượt xem 6 năm trước
Chất dẻo

Polime nào sau đây được dùng để chế tạo vật liệu có tính dẻo?

Hóa học Lớp 12
Xem chi tiết 14.5 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe phrase “For example,” in paragraph 3, introduces a sentence that gives examples of _________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 540 lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe word “they” in paragraph 3 refers to ____________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 3.1 K lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Đốt cháy hoàn toàn 3,42 gam hỗn hợp gồm axit acrylic, vinyl axetat, metyl acrylat và axit oleic, rồi hấp thụ toàn bộ sản phẩm cháy vào dung dịch CaOH2 (dư). Sau phản ứng thu được 18 gam kết tủa và dung dịch X. Khối lượng X so với khối lượng dung dịch CaOH2 ban đầu đã thay đổi như thế nào ?

Hóa học Lớp 12
Xem chi tiết 636 lượt xem 6 năm trước
Tổng hợp đề ôn tập thi THPTQG môn Sinh Học có đáp án (Đề số 19)

Cho các hệ quả sau:1. Ở đời con, bên cạnh các kiểu hình giống bố mẹ, còn có các kiểu hình khác nhau. Những kiểu hình này được gọi là các biến dị tổ hợp.2. Sự xuất hiện các biến dị tổ hợp ở F2 là kết quả của sự tổ hợp các cặp alen tương ứng của P qua quá trình phát sinh giao tử và thụ tinh.3. Nếu biết được các gen quy định tính trạng khác nhau phân li độc lập với nhau thì ta có thể dự đoán trước được kết quả phân li kiểu hình ở đời sau.4. Có những kiểu hình có ở bố mẹ nhưng lại không được biểu hiện ở đời sau và ngược lại.Số hệ quả có thể được suy ra từ các quy luật của Menđen là:

Sinh học Tốt nghiệp THPT
Xem chi tiết 1.1 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

 Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe word “an integral” in paragraph 2 is closest in meaning to ____________. 

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 2.3 K lượt xem 6 năm trước
Chất dẻo

Polime nào sau đây được dùng để chế tạo chất dẻo?

Hóa học Lớp 12
Xem chi tiết 18.4 K lượt xem 6 năm trước
30 đề thi thử đề thi thử THPTQG môn Tiếng Anh có lời giải chi tiết (Đề số 27)

Fill in each numbered blank with one suitable word or phrase.A thirteen-year-old does not spend as much money as his parents suspect - at least not (1) ………….the findings of recent survey, Money and Change. The survey (2) ……….. three hundred teenagers, 13-17 years old from (3) …………. Britain.By the time they (4) ………… their teens, most children see their weekly allowance rise dramatically to an amazing national average of $5.14. Two thirds think they get (5) …………. money but most expect to have to do something to get it.Although they have more cash, worry about debt is (6) ………….. among teenagers. Therefore, the majority of children make an effort to save for the future.Greater access to cash (7) ……………. teenagers does not, however, mean that they are more irresponsible as a result. The economic recession seems to have encouraged cautious attitudes to money, even in the case of children at these ages. Instead of wasting what pocket (8) …………… they have on sweets or magazines, the teenagers who took (9) …………. in the survey seem to respond to the situation by saving more than half (10) …………. their cash.Điền vào số 6 

Tiếng Anh Tốt nghiệp THPT
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Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe word “chance” in paragraph 2 is closest in meaning to_________________.

Tiếng Anh Tốt nghiệp THPT
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100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P1)

Hòa tan hết m gam hỗn hợp M gồm 2 oxit sắt trong lượng dư dung dịch HCl, thu được dung dịch X. Sục khí Cl2 tới dư vào X thu được dung dịch Y chứa 40,625 gam muối. Nếu cho m gam M trên tác dụng hết với dung dịch HNO3 loãng, dư thì thu được 0,05 mol NO (sản phẩm khử duy nhất). Giá trị của m là

Hóa học Lớp 12
Xem chi tiết 4.3 K lượt xem 6 năm trước
Tổng hợp đề thi thử môn Tiếng Anh có lời giải chi tiết (Đề số 2)

Read the following passage on transport, 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.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.     Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.     After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface. The passage has probably been taken from ___.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 812 lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P1)

Hòa tan hết 0,03 mol một oxit sắt có công thức FexOy vào dung dịch HNO3 loãng, dư thu được 0,01 mol một oxit nitơ có công thức NzOt (sản phẩm khử duy nhất). Mối quan hệ giữa x, y, z, t là 

Hóa học Lớp 12
Xem chi tiết 856 lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe word “bounds” in paragraph 2 is closest in meaning to ___________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 785 lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Hóa hơi 3,35 gam X gồm CH3COOH,HCOOC2H5,CH3COOCH3,CH3COOC2H5, thu được 1,68 lít hơi X (ở 136,5oC và áp suất 1 atm). Đốt cháy hoàn toàn 3,35 gam hỗn hợp X trên thì thu được m gam H2O. Giá trị của m là

Hóa học Lớp 12
Xem chi tiết 1.3 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingThe word “distinction” in paragraph 1 is closest in meaning to ___________.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.2 K lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P1)

Để 4,2 gam sắt trong không khí một thời gian thu được 5,32 gam hỗn hợp X gồm sắt và các oxit của nó. Hòa tan hết X bằng dung dịch HNO3, thấy sinh ra 0,448 lít khí NO (đktc, sản phẩm khử duy nhất) và dung dịch Y. Vậy khối lượng muối khan thu được khi cô cạn dung dịch Y là

Hóa học Lớp 12
Xem chi tiết 544 lượt xem 6 năm trước
Tổng hợp đề ôn tập thi THPTQG môn Sinh Học có đáp án (Đề số 19)

Ở một loài thực vật lưỡng bội, alen A quy định hạt vàng, alen a quy định hạt xanh, alen B quy định hạt trơn, alen b quy định hạt nhăn. Các gen phân li độc lập với nhau. Cho các cá thể trong quần thể lai ngẫu nhiên với nhau. Nếu không xét đến vai trò của giới tính. Hỏi có thể có bao nhiêu phép lai có sự phân tính kiểu hình?

Sinh học Tốt nghiệp THPT
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Tổng hợp đề thi thử môn Tiếng Anh có lời giải chi tiết (Đề số 2)

Read the following passage on transport, 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.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.     Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.     After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface. This passage is intended to ___.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 624 lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word for each of the questions.            It is commonly believed in the United States that school is where people go to get an education. Nevertheless, it has been said that today children interrupt their education to go to school .The distinction between schooling and education implied by this remark is important.                   Education is much more open-ended and all-inclusive than schooling. Education knows no bounds. It can take place anywhere, whether in the shower or on the job, whether in a kitchen or on a tractor. It includes both the formal learning that takes place in schools and the whole universe of informal learning. The agents of education can range from a revered grandparent to the people debating politics on the radio, from a child to a distinguished scientist. Whereas schooling has a certain predictability, education quite often produces surprises. A chance conversation with a stranger may lead a person to discover how little is known of other religions. People are engaged in education from infancy on. Education, then, is a very broad, inclusive term. It is a lifelong process, a process that starts long before the start of school, and one that should be an integral part of one's entire life.             Schooling, on the other hand, is a specific, formalized process, whose general pattern varies little from one setting to the next. Throughout a country, children arrive at school at approximately the same time, take assigned seats, are taught by an adult, use similar textbooks, do homework, take exams, and so on. The slices of reality that are to be learned, whether they are the alphabet or an understanding of the workings of government, have usually been limited by the boundaries of the subject being taught. For example, high school students know that they are not likely to find out in their classes the truth about political problems in their communities or what the newest filmmakers are experimenting with. There are definite conditions surrounding the formalized process of schoolingWhat is the main idea of the passage?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 545 lượt xem 6 năm trước
100 bài toán hay và khó về (H+ trong NO3-) KHÔNG có khí H2 thoát ra (P1)

Cho 22,72 gam hỗn hợp gồm Fe, FeO, Fe2O3 và Fe3O4 phản ứng hết với dung dịch HNO3 loãng dư thu được V lít khí NO(duy nhất ở đktc) và dung dịch X. Cô cạn dung dịch X thu được 77,44 gam muối khan. Giá trị của V là

Hóa học Lớp 12
Xem chi tiết 343 lượt xem 6 năm trước
PHÂN DẠNG CÂU HỎI VÀ VÍ DỤ MINH HỌA

Cho các chất: axit glutamic, saccarozơ, metylamoni clorua, vinyl axetat, phenol, glixerol, Gly-Gly. Số chất tác dụng với dung dịch NaOH loãng, nóng là

Hóa học Lớp 12
Xem chi tiết 1.2 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part following that needs correcting.ASEAN has actively worked (A) to improve the socio-economic situation and solve problems (B) among (C)  theirs (D) member countries

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 13.6 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part following that needs correcting.Women (A) are now better educate (B) and can promote themselves (C) much more easily (D) than in the past

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 4.5 K lượt xem 6 năm trước
Tổng hợp đề thi thử môn Tiếng Anh có lời giải chi tiết (Đề số 2)

Read the following passage on transport, 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.     The Sun today is a yellow dwarf star. It is fueled by thermonuclear reactions near its center that convert hydrogen to helium. The Sun has existed in its present state for about four billion six hundred million years and is thousands of times larger than the Earth.     By studying other stars, astronomers can predict what the rest of the Sun’s life will be like. About five billion years from now, the core of the Sun will shrink and become hotter. The surface temperature will fall. The higher temperature of the center will increase the rate of thermonuclear reactions. The outer regions of the Sun will expand approximately 35 million miles, about the distance to Mercury, which is the closest planet to the Sun. The Sun will then be a red giant star. Temperatures on the Earth will become too high for life to exist.     Once the Sun has used up its thermonuclear energy as a red giant, it will begin to shrink. After it shrinks to the size of the Earth, it will become a white dwarf star. The Sun may throw off huge amounts of gases in violent eruptions called nova explosions as it changes from a red giant to a white dwarf.     After billions of years as a white dwarf, the Sun will have used up all its fuel and will have lost its heat. Such a star is called a black dwarf. After the Sun has become a black dwarf, the Earth will be dark and cold. If any atmosphere remains there, it will have frozen over the Earth’s surface. The word “there” in the last sentence of paragraph 4 refers to.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 490 lượt xem 6 năm trước
PHÂN DẠNG CÂU HỎI VÀ VÍ DỤ MINH HỌA

Cho dãy các chất sau: toluen, phenyl fomat, saccarozơ, glyxylvalin (Gly-Val), etylen glicol, triolein. Số chất bị thuỷ phân trong môi trường kiềm là

Hóa học Lớp 12
Xem chi tiết 2.5 K lượt xem 6 năm trước
Cấu trúc của polime

Polime nào dưới đây có cùng loại cấu trúc mạch polime với nhựa bakelit?

Hóa học Lớp 12
Xem chi tiết 4.4 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part following that needs correcting.In nature(A) , the distributive (B) of plants is obviously (C) related to climate(D)

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 3.6 K lượt xem 6 năm trước
Sử dụng chất ảo, hỗn hợp ảo giải nhanh Hóa Hữu cơ

Đốt cháy hoàn toàn 80,08 gam hỗn hợp X gồm C3H7OH, C2H5OH, CH3OC3H thu được 95,76 gam H2O và V lít khí CO2 (đktc). Giá trị của V là?

Hóa học Lớp 12
Xem chi tiết 1.4 K lượt xem 6 năm trước
PHÂN DẠNG CÂU HỎI VÀ VÍ DỤ MINH HỌA

Chất nào sau đây không phản ứng với dung dịch NaOH?

Hóa học Lớp 12
Xem chi tiết 2.1 K lượt xem 6 năm trước
Cấu trúc của polime

Polime nào sau đây có cấu trúc mạch phân nhánh?

Hóa học Lớp 12
Xem chi tiết 8.4 K lượt xem 6 năm trước
Kỳ thi thử thpt quốc gia lần 1 năm 2019 môn Tiếng Anh cực hay có lời giải(Đề 13)

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part following that needs correcting. The World Health Organization’s main activities (A) are carrying of (B) research on (C) medical development and improving (D) international health care

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 3.6 K lượt xem 1 năm trước

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