_____ his income of current job is relatively low, he finds it difficult to make ends meet. A. Although B. As C. Beca...

LQ

Lê Quỳnh Anh

2 tháng 12 2017

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. Although he is recognized as one of the most brilliant scientists in his field, Professor White cannot seem to make his ideas understood in class. A. get his ideas down B. recall his ideas C. summarize his ideas D. get his ideas...

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1

DH

Dương Hoàn Anh

2 tháng 12 2017

Tạm dịch: Mặc dù được công nhận là một trong những nhà khoa học xuất sắc trong lĩnh vực của ông ta, giáo sư White dường như không thể khiến cho ý tưởng của mình được người khác hiểu khi ông ta giảng bài trên lớp.

make his ideas understood = get his ideas across: diễn đạt 1 cách lưu loát khiến người khác có thể hiểu điều mình nói

Chọn D

Các phương án khác:

A. viết lại những ý tưởng (get down = write down)

B. nhớ lại ý tưởng (recall = remember)

C. tóm tắt ý tưởng

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LQ

Lê Quỳnh Anh

2 tháng 7 2019

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.Although he is recognized as one of the most brilliant scientists in his field, Professor White cannot seem to make his ideas understood in class. A. get his ideas down B. recall his ideas C. summarize his ideas D. get his ideas...

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#Mẫu giáo

1

DH

Dương Hoàn Anh

2 tháng 7 2019

Đáp án : D

Make something understood = làm cho cái gì được hiểu. Get something across = diễn đạt được cái gì

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LQ

Lê Quỳnh Anh

23 tháng 10 2019

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.Peter had very little money. He managed to make ends meet. A. Peter found it hard to live on very little money B. Having a little money, Peter couldn’t make ends meet C. Peter could hardly live on little money. D. Peter got by on very little...

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#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 10 2019

Đáp án D

Peter có rất ít tiền. Anh ấy đã cố gắng xoay sở để kiếm sống.
= D. Peter đã cố xoay sở với số tiền ít ỏi. (get by: xoay sở, đối phó).
Các đáp án còn lại sai nghĩa:
A. Pteter nhận ra thật là khó để sống dựa vào 1 ít tiền.
B. Có ít tiền, Peter đã không thể sống no đủ.
C. Pteter đã không thể sống dựa vào 1 chút tiền.

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Lê Quỳnh Anh

7 tháng 7 2019

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 42The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how...

Đọc tiếp

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

The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the „lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.

Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

By Helena Gillespie and Rob Gillespie. Science for Primary School Teachers. OUP

Water is a poor conductor because it contains ______.

A. only a positive electric charge

B. only a small amount of fully charged particles

C. only a negative electric charge

D. no positive or negative electric

#Mẫu giáo

1

DH

Dương Hoàn Anh

7 tháng 7 2019

Đáp án B

Nước là chất dẫn điện kém bởi vì nó chứa

A.chỉ có điện tích dương

B. chỉ một lượng nhỏ các phân tử mang đầy điện

C. chỉ mang điện tích âm

D. không có điện tích âm hay điện tích dương

Dẫn chứng:Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral).

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Lê Quỳnh Anh

23 tháng 10 2017

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question. The biologist's role in society as well as his moral and ethical responsibility in the discovery and development of new ideas has led to a reassessment of his social and scientific value systems. A scientist can no longer ignore the consequences of his discoveries; he is as concerned with the possible misuses of his findings as he is with the basic research in...

Đọc tiếp

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question.

The biologist's role in society as well as his moral and ethical responsibility in the discovery and development of new ideas has led to a reassessment of his social and scientific value systems. A scientist can no longer ignore the consequences of his discoveries; he is as concerned with the possible misuses of his findings as he is with the basic research in which he is involved. This emerging social and political role of the biologist and all other scientists requires a weighing of values that cannot be done with the accuracy or the objectivity of a laboratory balance. As a member of society, it is necessary for a biologist now to redefine his social obligations and his functions, particularly in the realm of making judgments about such ethical problems as man's control of his environment or his manipulation of genes to direct further evolutionary development.

As a result of recent discoveries concerning hereditary mechanisms, genetic engineering, by which human traits are made to order, may soon be a reality. As desirable as it may seem to be, such an accomplishment would entail many value judgments. Who would decide, for example, which traits should be selected for change? In cases of genetic deficiencies and disease, the desirability of the change is obvious, but the possibilities for social misuse are so numerous that they may far outweigh the benefits.

Probably the greatest biological problem of the future, as it is of the present, will be to find ways to curb environmental pollution without interfering with man's constant effort to improve the quality of his life. Many scientists believe that underlying the spectra of pollution is the problem of surplus human population. A rise in population necessitates an increase in the operations of modern industry, the waste products of which increase the pollution of air, water, and soil. The question of how many people the resources of the Earth can support is one of critical importance.

Although the solutions to these and many other problems are yet to be found, they do indicate the need for biologists to work with social scientists and other members of society in order to determine the requirements necessary for maintaining a healthy and productive planet. For although many of man's present and future problems may seem to be essentially social, political, or economic in nature, they have biological ramifications that could affect the very existence of life itself.

It is implied in the passage that genetic engineering__________.

A. will change all human traits

B. is no longer desirable

C. is the most desirable for life

D. may do us more harm than good

#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 10 2017

Đáp án là D

Bài đọc ngụ ý rằng công nghệ gen

A. sẽ thay đổi toàn bộ tính cách của con người

B. không còn đáng khao khát nước

C. được khao khát nhất trong cuộc đời

D. có nhiều cái hại hơn là cái lợi

Dẫn chứng: In cases of genetic deficiencies and disease, the desirability of the change is obvious, but the possibilities for social misuse are so numerous that they may far outweigh the benefits

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LQ

Lê Quỳnh Anh

5 tháng 2 2017

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 42The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how...

Đọc tiếp

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

The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the „lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.

Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

By Helena Gillespie and Rob Gillespie. Science for Primary School Teachers. OUP

Salt in its solid state is not able to conduct electricity because ______.

A. . its charged ions can flow easily

B. it cannot create any charged ions

C. it has free electrons

D. its charged ions are not free to move

#Mẫu giáo

1

DH

Dương Hoàn Anh

5 tháng 2 2017

Đáp án D

Muối ở thể rắn không thể dẫn điện bởi vì

A.các ion mang điện của nó có thể chảy dễ dàng

B. nó không thể tạo ra ion mang điện

C. nó có các electron tự do

D. các ion mang điện của nó không tự do di chuyển

Dẫn chứng: In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow

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LQ

Lê Quỳnh Anh

23 tháng 3 2017

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question. The biologist's role in society as well as his moral and ethical responsibility in the discovery and development of new ideas has led to a reassessment of his social and scientific value systems. A scientist can no longer ignore the consequences of his discoveries; he is as concerned with the possible misuses of his findings as he is with the basic research in...

Đọc tiếp

Read the following passage, and mark the letter (A, B, C or D) on your answer sheet to indicate the correct answer to each question.

The biologist's role in society as well as his moral and ethical responsibility in the discovery and development of new ideas has led to a reassessment of his social and scientific value systems. A scientist can no longer ignore the consequences of his discoveries; he is as concerned with the possible misuses of his findings as he is with the basic research in which he is involved. This emerging social and political role of the biologist and all other scientists requires a weighing of values that cannot be done with the accuracy or the objectivity of a laboratory balance. As a member of society, it is necessary for a biologist now to redefine his social obligations and his functions, particularly in the realm of making judgments about such ethical problems as man's control of his environment or his manipulation of genes to direct further evolutionary development.

As a result of recent discoveries concerning hereditary mechanisms, genetic engineering, by which human traits are made to order, may soon be a reality. As desirable as it may seem to be, such an accomplishment would entail many value judgments. Who would decide, for example, which traits should be selected for change? In cases of genetic deficiencies and disease, the desirability of the change is obvious, but the possibilities for social misuse are so numerous that they may far outweigh the benefits.

Probably the greatest biological problem of the future, as it is of the present, will be to find ways to curb environmental pollution without interfering with man's constant effort to improve the quality of his life. Many scientists believe that underlying the spectra of pollution is the problem of surplus human population. A rise in population necessitates an increase in the operations of modern industry, the waste products of which increase the pollution of air, water, and soil. The question of how many people the resources of the Earth can support is one of critical importance.

Although the solutions to these and many other problems are yet to be found, they do indicate the need for biologists to work with social scientists and other members of society in order to determine the requirements necessary for maintaining a healthy and productive planet. For although many of man's present and future problems may seem to be essentially social, political, or economic in nature, they have biological ramifications that could affect the very existence of life itself.

The pronoun "it" in paragraph 2 refers to__________.

A. genetic engineering

B. an accomplishment

C. hereditary mechanism

D. a reality

#Mẫu giáo

1

DH

Dương Hoàn Anh

23 tháng 3 2017

Đáp án là A

Từ “it” ở đoạn 2 ám chỉ đến

A. việc cấy gen

B. một thành tựu

C. cơ chế di truyền

D. tính chân thật/ sự thật

Dẫn chứng: As a result of recent discoveries concerning hereditary mechanisms, genetic engineering, by which human traits are made to order, may soon be a reality. As desirable as it_may seem to be, such an accomplishment would entail many value judgments

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Lê Quỳnh Anh

29 tháng 5 2019

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 following questions The ability to conduct electricity is one of the key properties of a metal. Other solid material such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to...

Đọc tiếp

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 following questions

The ability to conduct electricity is one of the key properties of a metal. Other solid material such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what are known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the ‘lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow. Freshwater Aquarium Fish

Playlist Freshwater Aquarium Fish

Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor or electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

By Helena Gillespie and Rob Gillespie. Science for Primary School Teacher. OUP

Water is a poor conductor because it contains

A. no positive or negative electric charge

B. only a small amount of fully charged particles

C. only a positive electric charge

D. only a negative electric charge

#Mẫu giáo

1

DH

Dương Hoàn Anh

29 tháng 5 2019

Đáp án : B

Câu 2 đoạn cuối: Water itself is a poor conductor or electricity as it does not contain a significant amount of fully charged particles (không chứa đủ lượng hạt mang điện cần thiết)

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Lê Quỳnh Anh

25 tháng 2 2019

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 42The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how...

Đọc tiếp

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

The ability to conduct electricity is one of the key properties of a metal. Other solid materials such as silicon can conduct electricity but only effectively at certain temperatures. Also, some substances such as salt (sodium chloride) can conduct when molten or when dissolved in water. The ability of metals to conduct electricity is due to how their atoms bond together. In order to bond together the metal atoms lose at least one of their outermost electrons. This leaves the metal atoms with a positive charge and they are now strictly ions. The lost electrons are free to move in what is known as a sea of electrons. Since the electrons are negatively charged they attract the ions and this is what keeps the structure together.

An electric current is a flow of charge and since the electrons in the sea of electrons are free to move they can be made to flow in one direction when a source of electrical energy such as a battery is connected to the metal. Hence we have an electric current flowing through the wire, and this is what makes metals such good conductors of electricity. The only other common solid conducting material that pencil users are likely to encounter is graphite (what the „lead’ of a pencil is made from). Graphite is a form of carbon and again the carbon atoms bond in such a way that there is a sea of electrons that can be made to flow as an electric current. Likewise, if we have an ionic substance like salt we can make the electrically charged ions flow to create a current but only when those ions are free to move, either when the substance is a liquid or dissolved in water. In its solid state an ionic substance like salt cannot conduct electricity as its charged ions cannot flow.

Electrical insulators are substances that cannot conduct electricity well either, because they contain no charged particles or any charged particles they might contain do not flow easily. Water itself is a poor conductor of electricity as it does not contain a significant amount of fully charged particles (the ends of a water molecule are partly charged but overall the molecule is neutral). However, most water we encounter does contain dissolved charged particles, so it will be more conductive than pure water. Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive.

By Helena Gillespie and Rob Gillespie. Science for Primary School Teachers. OUP

We can have problems when touching electrical devices with wet hands because ______.

A. the water itself is a good conductor of electricity

B. the water contains too many neutral molecules

C. the water containing no charged particles makes it more conductive

D. the water dissolves the salt on our skin and becomes more conductive

#Mẫu giáo

1

DH

Dương Hoàn Anh

25 tháng 2 2019

Đáp án D

Chúng ta có thể gặp vấn đề khi chạm vào các dụng cụ điện với tay ướt bởi vì

A.bản thân nước là chất dẫn điện tốt

B. nước chứa quá nhiều các phân tử trung hòa

C. nước không chứa những phân tử mang điện làm cho nó dẫn điện tốt hơn.

D. nước hòa tan muối trên da chúng ta và trở nên có tính dẫn điện hơn.

Dẫn chứng: Many of the problems that occur when touching electrical devices with wet hands result from the ever-present salt that is left on our skin through perspiration and it dissolves in the water to make it more conductive

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