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POLIME VÀ VẬT LIỆU POLIME

Dãy các polime được điều chế bằng cách trùng ngưng là :

Hóa học Lớp 11
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 20)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
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Bộ đề luyện thi THPTQG Hóa Học cực hay có lời giải chi tiết (Đề số 14)

Thủy phân hoàn toàn 34,2 gam saccarozơ thu được dung dịch X. Lấy toàn bộ sản phẩm X của phản ứng thủy phân cho tác dụng với lượng dư dung dịch AgNO3 trong NH3 thu được a gam kết tủa. Còn nếu cho toàn bộ sản phẩm X tác dụng với nước brom (dư) thì có b gam brom phản ứng. Giá trị a, b lần lượt là:

Hóa học Tốt nghiệp THPT
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POLIME VÀ VẬT LIỆU POLIME

Trong các polime sau : (1) poli(metyl metacrylat); (2) polistiren ; (3) nilon-7; (4) poli(etylen-terephtalat); (5) nilon-6,6; (6) poli(vinyl axetat), các polime là sản phẩm của phản ứng trùng ngưng là:

Hóa học Lớp 11
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Bài 8: Điện năng. Công suất điện.

Một ấm điện có ghi 120V - 480W, người ta sử dụng nguồn điện có hiệu điện thế 120V để đun nước. Điện trở của ấm và cường độ dòng điện qua ấm bằng

Vật lý Lớp 11
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Chương IV. CÁC ĐỊNH LUẬT BẢO TOÀN (P2)

Một ô tô chạy đều trên đường nằm ngang với vận tốc 54 km/h. Công suất của động cơ ô tô là 72 kW. Lực phát động của động cơ ô tô là

Vật lý Lớp 10
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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 questionsWe couldn’t solve the problem until our teacher arrived

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 20)

Mark the letter A, B, C, or D on your answer sheet to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 17)

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 45 to 54.Colors are one of the most exciting experiences in life. I love them, and they are just as important to me as emotions are. Have you ever wondered how the two are so intimately related? Color directly affects your emotions. Color both reflects the current state of your emotions, and is something that you can use to improve or change your emotions. The color that you choose to wear either reflects your current state of being, or reflects the color or emotion that you need.The colors that you wear affect you much more than they affect the people around you. Of course, they also affect anyone who comes in contract with you, but you are the one saturated with the color all day! I even choose items around me based on their color. In the morning, I choose my clothes based on the color or emotion that I need for the day. So you can consciously use color to control the emotions that you are exposed to, which can help you to feel better.Color, sound, and emotions are all vibrations. Emotions are literally energy in motion; they are meant to move and flow. This is the reason that real feelings are the fastest way to get your energy in motion. Also, flowing energy is exactly what creates healthy cells in your body. So, the fastest way to be healthy is to be open to your real feelings. Alternately, the fastest way to create disease is to inhibit your emotionsThe term “intimately” in paragraph 1 is closest in meaning to ______

Tiếng Anh Tốt nghiệp THPT
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Bộ đề luyện thi Hóa Học cực hay có lời giải chi tiết (Đề số 15)

Hỗn hợp E gồm chất X ( C3H7O3N) và chất Y ( C5H14O4N2) trong đó X là muối của axit vô cơ và Y là muối của axit cacbonxylic hai chức. Cho 34,2 g X tác dụng với 500 ml dung dịch NaOH 1M ( phản ứng vừa đủ ) thu được khí Z duy nhất ( Z chứa C, H, N và làm quỳ tím ẩm đổi màu xanh) và dung dịch sau phản ứng chứa m g muối. Giá trị của m là

Hóa học Tốt nghiệp THPT
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POLIME VÀ VẬT LIỆU POLIME

Polime được điều chế bằng phản ứng trùng ngưng là ?

Hóa học Lớp 11
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Bộ đề luyện thi THPTQG Hóa Học cực hay có lời giải chi tiết (Đề số 14)

Cho các phát biểu sau về cacbohiđrat:(a) Glucozơ và saccarozơ đều là chất rắn có vị ngọt, dễ tan trong nước.(b) Tinh bột và xenlulozơ đều là polisaccarit.(c) Trong dung dịch, glucozơ và saccarozơ đều hòa tan Cu(OH)2, tạo phức màu xanh lam.(d) Khi thủy phân hoàn toàn hỗn hợp gồm tinh bột và saccarozơ trong môi trường axit, chỉ thu được một loại monosaccarit.(e) Khi đun nóng glucozơ (hoặc fructozơ) với dung dịch AgNO3 trong NH3 thu được Ag.(f) Glucozơ và saccarozơ đều tác dụng với H2 (xúc tác Ni, đun nóng) tạo sobitol.Số phát biểu đúng là

Hóa học Tốt nghiệp THPT
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2.5. Xác định cấu tạo peptit qua phản ứng thủy phân

Thủy phân hoàn toàn một pentapeptit E (có phân tử khối là 373) chỉ thu được một α-amino axit T duy nhất (phân tử chứa một nhóm amino và một nhóm cacboxyl). Tên gọi của T là 

Hóa học Lớp 12
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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.I thought she was the right person for the position, yet it turned out that she was quite useless.

Tiếng Anh Tốt nghiệp THPT
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Chương IV. CÁC ĐỊNH LUẬT BẢO TOÀN (P2)

Một khối hộp có khối lượng 10 kg được đẩy lên cao 3 m theo mặt phẳng nghiêng góc 30°  với tốc độ không đổi bởi lực  dọc theo mặt phẳng nghiêng. Hệ số ma sát trượt giữa vật và mặt phẳng là 0,2. Lấy g=10m/s2. Công của lực  bằng

Vật lý Lớp 10
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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 17)

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 45 to 54.Colors are one of the most exciting experiences in life. I love them, and they are just as important to me as emotions are. Have you ever wondered how the two are so intimately related? Color directly affects your emotions. Color both reflects the current state of your emotions, and is something that you can use to improve or change your emotions. The color that you choose to wear either reflects your current state of being, or reflects the color or emotion that you need.The colors that you wear affect you much more than they affect the people around you. Of course, they also affect anyone who comes in contract with you, but you are the one saturated with the color all day! I even choose items around me based on their color. In the morning, I choose my clothes based on the color or emotion that I need for the day. So you can consciously use color to control the emotions that you are exposed to, which can help you to feel better.Color, sound, and emotions are all vibrations. Emotions are literally energy in motion; they are meant to move and flow. This is the reason that real feelings are the fastest way to get your energy in motion. Also, flowing energy is exactly what creates healthy cells in your body. So, the fastest way to be healthy is to be open to your real feelings. Alternately, the fastest way to create disease is to inhibit your emotionsAccording to this passage, what creates disease?

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 20)

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
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POLIME VÀ VẬT LIỆU POLIME

Tơ nilon-6,6 là sản phẩm trùng ngưng của

Hóa học Lớp 11
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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 questionsI don’t find it difficult to get up early in the morning

Tiếng Anh Tốt nghiệp THPT
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Tổng hợp đề thi thử THPT quốc gia môn tiếng anh có lời giải chi tiết (Đề số 20)

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 1.3 K lượt xem 6 năm trước
Bài 8: Điện năng. Công suất điện.

Hai bóng đèn có các hiệu điện thế định mức lần lượt là U1 và U2. Biết công suất định mức của hai bóng đèn đó bằng nhau. Tỉ số giữa điện trở của các bóng đènR1R2 bằng

Vật lý Lớp 11
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POLIME VÀ VẬT LIỆU POLIME

Poli(etylen terephtalat) được điều chế bằng phản ứng với axit teraphtalic với chất nào sau đây?

Hóa học Lớp 11
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questionsFor its establishment, ASEAN Tourism Association has played an important role in promoting and developing ASEAN Tourism services

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 28 K lượt xem 6 năm trước
Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 17)

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 45 to 54.Colors are one of the most exciting experiences in life. I love them, and they are just as important to me as emotions are. Have you ever wondered how the two are so intimately related? Color directly affects your emotions. Color both reflects the current state of your emotions, and is something that you can use to improve or change your emotions. The color that you choose to wear either reflects your current state of being, or reflects the color or emotion that you need.The colors that you wear affect you much more than they affect the people around you. Of course, they also affect anyone who comes in contract with you, but you are the one saturated with the color all day! I even choose items around me based on their color. In the morning, I choose my clothes based on the color or emotion that I need for the day. So you can consciously use color to control the emotions that you are exposed to, which can help you to feel better.Color, sound, and emotions are all vibrations. Emotions are literally energy in motion; they are meant to move and flow. This is the reason that real feelings are the fastest way to get your energy in motion. Also, flowing energy is exactly what creates healthy cells in your body. So, the fastest way to be healthy is to be open to your real feelings. Alternately, the fastest way to create disease is to inhibit your emotionsAccording to the passage, what do color, sound, and emotion all have in common?

Tiếng Anh Tốt nghiệp THPT
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions The ocean probably distinguishes the earth from other planets of the solar system, for scientists believe that large bodies of water are not existing on the other planets

Tiếng Anh Tốt nghiệp THPT
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2.5. Xác định cấu tạo peptit qua phản ứng thủy phân

Peptit  X có công thức cấu tạo sau: Gly-Lys-Ala-Gly-Lys-Val. Thủy phân không hoàn toàn X có thể thu được tối đa bao nhiêu đipeptit? 

Hóa học Lớp 12
Xem chi tiết 15.1 K lượt xem 6 năm trước
ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 11)

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. Less than a year ago marketing director, David Smith, 33 was behaving like a secet agent. He used to secretly taped all his conversations, he refused to sign his name and he would ask his secretary to check all his emails. Anything he wrote was photocopied and kept as “evidence”. But David isn’t mad, or even mildly eccertric. He suffers from ‘resposibility OCD’, one of more common form of obsessive compulsive disorder, or OCD, as it is usually known. OCD is now recognized as the second most prevalent mental-health problem, after depression – and the number of reported cases is soaring. Experts estimate that 2% - 3% of the population suffer from the full-blown syndrome, with as many as one in five suffering from a milder form. OCD sufferers are tortured by obsessional thoughts, such as worrying that their hands are contaminated by germs. The terrible anxiety is only relieved by performing a particular set of behaviours. Unfortunately, any sense of relief is short-lived, which is why the behaviour must be repeated again and again. OCD sufferers know their behavior is irrational, yet feel powerless to stop. Common treatments are either antidepressants or behavioral therapy with a psychologist, but only 60% of patients show some improvement. However, a new treatment from America is bringing fresh hope to sufferers. One of the OCD gurus and neuropsychiatrists, Jeffrey Schwartz, has designed the Four Steps program which employs meditation teachniques with the aim of teaching sufferers to manage their symptoms by themselves. “The goal is to learn to override false brain messages”, explains Schwartz. There are different theories about what causes the disorder. Most experts recognize a genetic element that can be triggered by a stressful event. Schwartz believes that the OCD ‘worry circuit’ is a direct result of faulty brain chemistry. ‘When someone experiences an OCD thought, one part of the brain knows quite clearly that the hand are not dirty’, explains Schwartz ‘Some part of the brain is standing apart from the symptoms, reflecting on the sheer bizarreness of it all. The objective is to harness this impartial spectator so that patients can use this healthy part of their brain to resist the compulsions.’ David Smith is delighted with the results of Schwartz’s treatment. ‘Now I can sign cheques without a problem’, he says brightly. ‘And I don’t photocopy them either. OCD used to feel like a huge stigma, but I don’t feel handicapped by it any more. You just deal with it.’ The healthy part of an OCD sufferer’s brain . 

Tiếng Anh Tốt nghiệp THPT
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POLIME VÀ VẬT LIỆU POLIME

Cho dãy các polime sau: polietilen, xenlulozơ, nilon –6,6, amilozơ, nilon-6, tơ nitron, polibutađien, tơ visco. Số polime tổng hợp có trong dãy là:

Hóa học Lớp 11
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.Fifty minutes are the maximum length of time allotted for the exam.

Tiếng Anh Tốt nghiệp THPT
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Đề thi thử THPT Quốc Gia năm 2019 môn Vật Lý (Đề số 1)

Trong các tia sau, tia nào là dòng các hạt không mang điện tích?

Vật lý Tốt nghiệp THPT
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Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 17)

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 45 to 54.Colors are one of the most exciting experiences in life. I love them, and they are just as important to me as emotions are. Have you ever wondered how the two are so intimately related? Color directly affects your emotions. Color both reflects the current state of your emotions, and is something that you can use to improve or change your emotions. The color that you choose to wear either reflects your current state of being, or reflects the color or emotion that you need.The colors that you wear affect you much more than they affect the people around you. Of course, they also affect anyone who comes in contract with you, but you are the one saturated with the color all day! I even choose items around me based on their color. In the morning, I choose my clothes based on the color or emotion that I need for the day. So you can consciously use color to control the emotions that you are exposed to, which can help you to feel better.Color, sound, and emotions are all vibrations. Emotions are literally energy in motion; they are meant to move and flow. This is the reason that real feelings are the fastest way to get your energy in motion. Also, flowing energy is exactly what creates healthy cells in your body. So, the fastest way to be healthy is to be open to your real feelings. Alternately, the fastest way to create disease is to inhibit your emotionsWho is more influenced by colors you wear?

Tiếng Anh Tốt nghiệp THPT
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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    You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar? Much research on emotional expressions has centered on such questions.    According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same "facial language". Studies by Ekman's group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far- flung places as Argentina, Japan, Spain, Hungary, Poland , Sumatra ,the United States, Vietnam, the jungles of New Guinea , and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays - the so called display rules. In many Asian cultures, for example, children are taught to control emotional responses - especially negative ones- while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree , in people's behavior. From their first days of life, babies produce facial expressions that communicate their feelings.           The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people's faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Charles Darwin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross - cultural psychologists tell us that certain emotional responses carry different meanings in different cultures. For example, what emotion do you suppose might be conveyed by sticking out your tongue? For Americans, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.The biggest difference lies in______.

Tiếng Anh Tốt nghiệp THPT
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POLIME VÀ VẬT LIỆU POLIME

Tơ lapsan thuộc loại

Hóa học Lớp 11
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 11)

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. Less than a year ago marketing director, David Smith, 33 was behaving like a secet agent. He used to secretly taped all his conversations, he refused to sign his name and he would ask his secretary to check all his emails. Anything he wrote was photocopied and kept as “evidence”. But David isn’t mad, or even mildly eccertric. He suffers from ‘resposibility OCD’, one of more common form of obsessive compulsive disorder, or OCD, as it is usually known. OCD is now recognized as the second most prevalent mental-health problem, after depression – and the number of reported cases is soaring. Experts estimate that 2% - 3% of the population suffer from the full-blown syndrome, with as many as one in five suffering from a milder form. OCD sufferers are tortured by obsessional thoughts, such as worrying that their hands are contaminated by germs. The terrible anxiety is only relieved by performing a particular set of behaviours. Unfortunately, any sense of relief is short-lived, which is why the behaviour must be repeated again and again. OCD sufferers know their behavior is irrational, yet feel powerless to stop. Common treatments are either antidepressants or behavioral therapy with a psychologist, but only 60% of patients show some improvement. However, a new treatment from America is bringing fresh hope to sufferers. One of the OCD gurus and neuropsychiatrists, Jeffrey Schwartz, has designed the Four Steps program which employs meditation teachniques with the aim of teaching sufferers to manage their symptoms by themselves. “The goal is to learn to override false brain messages”, explains Schwartz. There are different theories about what causes the disorder. Most experts recognize a genetic element that can be triggered by a stressful event. Schwartz believes that the OCD ‘worry circuit’ is a direct result of faulty brain chemistry. ‘When someone experiences an OCD thought, one part of the brain knows quite clearly that the hand are not dirty’, explains Schwartz ‘Some part of the brain is standing apart from the symptoms, reflecting on the sheer bizarreness of it all. The objective is to harness this impartial spectator so that patients can use this healthy part of their brain to resist the compulsions.’ David Smith is delighted with the results of Schwartz’s treatment. ‘Now I can sign cheques without a problem’, he says brightly. ‘And I don’t photocopy them either. OCD used to feel like a huge stigma, but I don’t feel handicapped by it any more. You just deal with it.’Jeffrey Schwartz believes that OCD is caused by . 

Tiếng Anh Tốt nghiệp THPT
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Bộ đề luyện thi THPTQG Hóa Học cực hay có lời giải chi tiết (Đề số 14)

Cho các phát biểu sau:(a) Glucozơ được dùng để tráng gương, tráng ruột phích.(b) Trong công nghiệp tinh bột dùng sản xuất bánh kẹo.(c) Xenlulozơ là nguyên liệu chế tạo thuốc súng không khói.(d) Trong công nghiệp dược phẩm saccarozơ dùng pha chế thuốc.Số phát biểu đúng là

Hóa học Tốt nghiệp THPT
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2.5. Xác định cấu tạo peptit qua phản ứng thủy phân

Khi thủy phân peptit có công thức sau: H2NCH(CH3)CONHCH2CONHCH2CONHCH2CONHCH(CH3)COOH thì sản phẩm thu được có tối đa bao nhiêu peptit có phản ứng màu biure? 

Hóa học Lớp 12
Xem chi tiết 12.1 K lượt xem 6 năm trước
20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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    You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar? Much research on emotional expressions has centered on such questions.    According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same "facial language". Studies by Ekman's group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far- flung places as Argentina, Japan, Spain, Hungary, Poland , Sumatra ,the United States, Vietnam, the jungles of New Guinea , and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays - the so called display rules. In many Asian cultures, for example, children are taught to control emotional responses - especially negative ones- while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree , in people's behavior. From their first days of life, babies produce facial expressions that communicate their feelings.           The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people's faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Charles Darwin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross - cultural psychologists tell us that certain emotional responses carry different meanings in different cultures. For example, what emotion do you suppose might be conveyed by sticking out your tongue? For Americans, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.Young children______

Tiếng Anh Tốt nghiệp THPT
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ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 11)

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. Less than a year ago marketing director, David Smith, 33 was behaving like a secet agent. He used to secretly taped all his conversations, he refused to sign his name and he would ask his secretary to check all his emails. Anything he wrote was photocopied and kept as “evidence”. But David isn’t mad, or even mildly eccertric. He suffers from ‘resposibility OCD’, one of more common form of obsessive compulsive disorder, or OCD, as it is usually known. OCD is now recognized as the second most prevalent mental-health problem, after depression – and the number of reported cases is soaring. Experts estimate that 2% - 3% of the population suffer from the full-blown syndrome, with as many as one in five suffering from a milder form. OCD sufferers are tortured by obsessional thoughts, such as worrying that their hands are contaminated by germs. The terrible anxiety is only relieved by performing a particular set of behaviours. Unfortunately, any sense of relief is short-lived, which is why the behaviour must be repeated again and again. OCD sufferers know their behavior is irrational, yet feel powerless to stop. Common treatments are either antidepressants or behavioral therapy with a psychologist, but only 60% of patients show some improvement. However, a new treatment from America is bringing fresh hope to sufferers. One of the OCD gurus and neuropsychiatrists, Jeffrey Schwartz, has designed the Four Steps program which employs meditation teachniques with the aim of teaching sufferers to manage their symptoms by themselves. “The goal is to learn to override false brain messages”, explains Schwartz. There are different theories about what causes the disorder. Most experts recognize a genetic element that can be triggered by a stressful event. Schwartz believes that the OCD ‘worry circuit’ is a direct result of faulty brain chemistry. ‘When someone experiences an OCD thought, one part of the brain knows quite clearly that the hand are not dirty’, explains Schwartz ‘Some part of the brain is standing apart from the symptoms, reflecting on the sheer bizarreness of it all. The objective is to harness this impartial spectator so that patients can use this healthy part of their brain to resist the compulsions.’ David Smith is delighted with the results of Schwartz’s treatment. ‘Now I can sign cheques without a problem’, he says brightly. ‘And I don’t photocopy them either. OCD used to feel like a huge stigma, but I don’t feel handicapped by it any more. You just deal with it.’What does the word ‘override’ in paragraph 5 closest in meaning to? 

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 661 lượt xem 6 năm trước
20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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    You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar? Much research on emotional expressions has centered on such questions.    According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same "facial language". Studies by Ekman's group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far- flung places as Argentina, Japan, Spain, Hungary, Poland , Sumatra ,the United States, Vietnam, the jungles of New Guinea , and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays - the so called display rules. In many Asian cultures, for example, children are taught to control emotional responses - especially negative ones- while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree , in people's behavior. From their first days of life, babies produce facial expressions that communicate their feelings.           The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people's faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Charles Darwin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross - cultural psychologists tell us that certain emotional responses carry different meanings in different cultures. For example, what emotion do you suppose might be conveyed by sticking out your tongue? For Americans, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.Unlike American children, Asian children are encouraged to______.

Tiếng Anh Tốt nghiệp THPT
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POLIME VÀ VẬT LIỆU POLIME

Cho các loại tơ: bông, tơ capron, tơ xenlulozơ axetat, tơ tằm, tơ nitron, nilon-6,6. Số tơ tổng hợp là

Hóa học Lớp 11
Xem chi tiết 10.9 K lượt xem 6 năm trước
Bộ đề luyện thi THPTQG Hóa Học cực hay có lời giải chi tiết (Đề số 14)

Đốt cháy hoàn toàn 14,24 gam hỗn hợp X chứa 2 este đều no, đơn chức, mạch hở thu được CO2 và H2O có tổng khối lượng là 34,72 gam. Mặt khác đun nóng 14,24 gam X với dung dịch NaOH vừa đủ, thu được hỗn hợp Y chứa 2 ancol kế tiếp và hỗn hợp z chứa 2 muối của 2 axit cacboxylic kế tiếp, trong đó có a gam muối A và b gam muối B (MA < MB). Tỉ lệ gần nhất của a : b là

Hóa học Tốt nghiệp THPT
Xem chi tiết 442 lượt xem 6 năm trước
ĐỀ THI THỬ THPT QUỐC GIA NĂM 2019 – LẦN 2 Môn thi: TIẾNG ANH (Đề 11)

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. Less than a year ago marketing director, David Smith, 33 was behaving like a secet agent. He used to secretly taped all his conversations, he refused to sign his name and he would ask his secretary to check all his emails. Anything he wrote was photocopied and kept as “evidence”. But David isn’t mad, or even mildly eccertric. He suffers from ‘resposibility OCD’, one of more common form of obsessive compulsive disorder, or OCD, as it is usually known. OCD is now recognized as the second most prevalent mental-health problem, after depression – and the number of reported cases is soaring. Experts estimate that 2% - 3% of the population suffer from the full-blown syndrome, with as many as one in five suffering from a milder form. OCD sufferers are tortured by obsessional thoughts, such as worrying that their hands are contaminated by germs. The terrible anxiety is only relieved by performing a particular set of behaviours. Unfortunately, any sense of relief is short-lived, which is why the behaviour must be repeated again and again. OCD sufferers know their behavior is irrational, yet feel powerless to stop. Common treatments are either antidepressants or behavioral therapy with a psychologist, but only 60% of patients show some improvement. However, a new treatment from America is bringing fresh hope to sufferers. One of the OCD gurus and neuropsychiatrists, Jeffrey Schwartz, has designed the Four Steps program which employs meditation teachniques with the aim of teaching sufferers to manage their symptoms by themselves. “The goal is to learn to override false brain messages”, explains Schwartz. There are different theories about what causes the disorder. Most experts recognize a genetic element that can be triggered by a stressful event. Schwartz believes that the OCD ‘worry circuit’ is a direct result of faulty brain chemistry. ‘When someone experiences an OCD thought, one part of the brain knows quite clearly that the hand are not dirty’, explains Schwartz ‘Some part of the brain is standing apart from the symptoms, reflecting on the sheer bizarreness of it all. The objective is to harness this impartial spectator so that patients can use this healthy part of their brain to resist the compulsions.’ David Smith is delighted with the results of Schwartz’s treatment. ‘Now I can sign cheques without a problem’, he says brightly. ‘And I don’t photocopy them either. OCD used to feel like a huge stigma, but I don’t feel handicapped by it any more. You just deal with it.’ What does the word ‘their’ in paragraph 5 refers?

Tiếng Anh Tốt nghiệp THPT
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20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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    You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar? Much research on emotional expressions has centered on such questions.    According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same "facial language". Studies by Ekman's group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far- flung places as Argentina, Japan, Spain, Hungary, Poland , Sumatra ,the United States, Vietnam, the jungles of New Guinea , and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays - the so called display rules. In many Asian cultures, for example, children are taught to control emotional responses - especially negative ones- while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree , in people's behavior. From their first days of life, babies produce facial expressions that communicate their feelings.           The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people's faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Charles Darwin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross - cultural psychologists tell us that certain emotional responses carry different meanings in different cultures. For example, what emotion do you suppose might be conveyed by sticking out your tongue? For Americans, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.The best title for the passage is______.

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 1.9 K lượt xem 6 năm trước
Bài 8: Điện năng. Công suất điện.

Khi nối hai cực của nguồn điện với một mạch ngoài thì công do nguồn điện sinh ra trong thời gian một phút là 720J. Công suất của nguồn điện bằng

Vật lý Lớp 11
Xem chi tiết 56.9 K lượt xem 6 năm trước
Bộ đề luyện thi Hóa Học cực hay có lời giải chi tiết (Đề số 15)

Cho 250 ml dung dịch NaOH 2M tác dụng với 150 ml dung dịch AlCl3 1M sau phản ứng thu được m g kết tủa. Giá trị của m là

Hóa học Tốt nghiệp THPT
Xem chi tiết 614 lượt xem 6 năm trước
2.5. Xác định cấu tạo peptit qua phản ứng thủy phân

Thủy phân hoàn toàn H2N–CH2–CO–NH–CH(CH3)–CO–NH–CH(CH3)–CO–NH–CH2–CO–NH–CH2–COOH thu được bao nhiêu loại α–amino axit khác nhau? 

Hóa học Lớp 12
Xem chi tiết 6.1 K lượt xem 6 năm trước
Tổng hợp đề thi Tiếng Anh có lời giải (Đề số 17)

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 45 to 54.Colors are one of the most exciting experiences in life. I love them, and they are just as important to me as emotions are. Have you ever wondered how the two are so intimately related? Color directly affects your emotions. Color both reflects the current state of your emotions, and is something that you can use to improve or change your emotions. The color that you choose to wear either reflects your current state of being, or reflects the color or emotion that you need.The colors that you wear affect you much more than they affect the people around you. Of course, they also affect anyone who comes in contract with you, but you are the one saturated with the color all day! I even choose items around me based on their color. In the morning, I choose my clothes based on the color or emotion that I need for the day. So you can consciously use color to control the emotions that you are exposed to, which can help you to feel better.Color, sound, and emotions are all vibrations. Emotions are literally energy in motion; they are meant to move and flow. This is the reason that real feelings are the fastest way to get your energy in motion. Also, flowing energy is exactly what creates healthy cells in your body. So, the fastest way to be healthy is to be open to your real feelings. Alternately, the fastest way to create disease is to inhibit your emotionsWhich of the following can be affected by color?

Tiếng Anh Tốt nghiệp THPT
Xem chi tiết 428 lượt xem 6 năm trước
POLIME VÀ VẬT LIỆU POLIME

Dãy gồm các chất có khả năng phản ứng tạo ra polime là

Hóa học Lớp 11
Xem chi tiết 1.4 K lượt xem 6 năm trước
Chương IV. CÁC ĐỊNH LUẬT BẢO TOÀN (P2)

Một vật có khối lượng 1 kg trượt không vận tốc đầu từ đỉnh một mặt phẳng nghiêng dài 3 m, cao 1,2 m. Vận tốc của vật ở chân mặt phẳng nghiêng bằng 2 m/s. Lấy g=10m/s2. Công của lực ma sát bằng

Vật lý Lớp 10
Xem chi tiết 19.8 K lượt xem 6 năm trước
20 Đề ôn thi Tiếng Anh chuẩn cấu trúc có lời giải chi tiết (Đề số 19)

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    You can usually tell when your friends are happy or angry by the looks on their faces or by their actions. This is useful because reading their emotional expressions helps you to know how to respond to them. Emotions have evolved to help us respond to important situations and to convey our intentions to others. But does raising the eyebrows and rounding the mouth say the same thing in Minneapolis as it does in Madagascar? Much research on emotional expressions has centered on such questions.    According to Paul Ekman, the leading researcher in this area, people speak and understand substantially the same "facial language". Studies by Ekman's group have demonstrated that humans share a set of universal emotional expressions that testify to the common biological heritage of the human species. Smiles, for example, signal happiness and frowns indicate sadness on the faces of people in such far- flung places as Argentina, Japan, Spain, Hungary, Poland , Sumatra ,the United States, Vietnam, the jungles of New Guinea , and the Eskimo villages north of Artic Circle. Ekman and his colleagues claim that people everywhere can recognize at least seven basic emotions: sadness, fear, anger, disgust, contempt, happiness, and surprise. There are, however, huge differences across cultures in both the context and intensity of emotional displays - the so called display rules. In many Asian cultures, for example, children are taught to control emotional responses - especially negative ones- while many American children are encouraged to express their feelings more openly. Regardless of culture, however, emotions usually show themselves, to some degree , in people's behavior. From their first days of life, babies produce facial expressions that communicate their feelings.           The ability to read facial expressions develops early, too. Very young children pay close attention to facial expressions, and by age five, they nearly equal adults in their skill at reading emotions on people's faces. This evidence all points to a biological underpinning for our abilities to express and interpret a basic set of human emotions. Moreover, as Charles Darwin pointed out over a century ago, some emotional expressions seem to appear across species boundaries. Cross - cultural psychologists tell us that certain emotional responses carry different meanings in different cultures. For example, what emotion do you suppose might be conveyed by sticking out your tongue? For Americans, this might indicate disgust, while in China it can signify surprise. Likewise, a grin on an American face may indicate joy, while on a Japanese face it may just as easily mean embarrassment. Clearly, culture influences emotional expressions.The word ''evolved" in the passage is closest in meaning to______.

Tiếng Anh Tốt nghiệp THPT
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