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Read the following passage and mark the letter A, B, C, or D  to Indicate the correct answer to each of the questions from 1 to 5.

The term "virus" is derived from the Latin word for poison or slime. It was originally applied to the noxious stench emanating from swamps that was thought to cause a variety of diseases in the centuries before microbes were discovered and specifically linked to illness. But it was not until almost the end of the nineteenth century that a true virus was proven to be the cause of a disease.

The nature of viruses made them impossible to detect for many years even after bacteria had been discovered and studied. Not only are viruses too small to be seen with a light microscope, they also cannot be detected through their biological activity, except as it occurs in conjunction with other organisms. In fact, viruses show no traces of biological activity by themselves. Unlike bacteria, they are not living agents in the strictest sense. Viruses are very simple pieces of organic material composed only of nucleic acid, either DNA or RNA, enclosed in a coat of protein made up of simple structural units. (Some viruses also contain carbohydrates and lipids.) They are parasites, requiring human, animal, or plant cells to live. The virus replicates by attaching to a cell and injecting its nucleic acid.’ once inside the cell, the DNA or RNA that contains the virus' genetic information takes over the cell's biological machinery, and the cell begins to manufacture viral proteins rather than its own.

Question 1. Before microbes were discovered it was believed that some diseases were caused by__________.

A. germ-carrying insects                                                B. certain strains of bacteria

C. foul odors released from swamps                             D. slimy creatures living near swamps

Question 2. The word "proven" in the passage is closest meaning to____________.

A. shown                              B. feared                           C. imagined                      D. considered

Question 3. The word "nature” in the passage is closest in meaning to____________.

A. self-sufficiency               B. shapes                           C. characteristics               D. speed

Question 4. The author implies that bacteria were investigated earlier than viruses because____________.

A. bacteria are easier to detect                                       B. bacteria are harder to eradicate

C. viruses are extremely poisonous                                D. viruses are found only in hot climates

Question 5. All of the following may be components of a virus EXCEPT____________.

A. RNA                               B. plant cells                     C. carbohydrates               D. a coat of protein

2
27 tháng 8 2021

Question 1. Before microbes were discovered it was believed that some diseases were caused by__________.

A. germ-carrying insects                                                B. certain strains of bacteria

C. foul odors released from swamps                             D. slimy creatures living near swamps

Question 2. The word "proven" in the passage is closest meaning to____________.

A. shown                              B. feared                           C. imagined                      D. considered

Question 3. The word "nature” in the passage is closest in meaning to____________.

A. self-sufficiency               B. shapes                           C. characteristics               D. speed

Question 4. The author implies that bacteria were investigated earlier than viruses because____________.

A. bacteria are easier to detect                                       B. bacteria are harder to eradicate

C. viruses are extremely poisonous                                D. viruses are found only in hot climates

Question 5. All of the following may be components of a virus EXCEPT____________.

 

A. RNA                               B. plant cells                     C. carbohydrates               D. a coat of protein

27 tháng 8 2021

Q1.C

Q2.A

Q3.C

Q4.A

Q5.B

tick mik nha

Complete the passage with the suitable words. Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1) .......... of it. But illness can come, even (2) ........... we are young. In fact, childhood has been a very vulnerable time. Many (3) ........ attacked children in particular and people knew very little about how to prevent such illness or how to (4) ........ them once they struck. The resuft was that many children died. About century ago,...
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Complete the passage with the suitable words.

Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1) .......... of it. But illness can come, even (2) ........... we are young. In fact, childhood has been a very vulnerable time. Many (3) ........ attacked children in particular and people knew very little about how to prevent such illness or how to (4) ........ them once they struck. The resuft was that many children died. About century ago, however, scientists found out about germs, and then everything (5) ........ The cause of many diseases (6) ........ known, and cures were developed. As this medical knowledge spread the world became (7).......... safer for children. The resuft is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (8)........... for years. And what do we except by the years 2010 ? Undoubtedly, (9)....... science will continue to advance. Some people will be able to (10).......... medical problems that are unavoidable today.

1
18 tháng 7 2018

Complete the passage with the suitable words.

Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1) ..aware........ of it. But illness can come, even (2) .......when.... we are young. In fact, childhood has been a very vulnerable time. Many (3) ....diseases.... attacked children in particular and people knew very little about how to prevent such illness or how to (4) ...cure..... them once they struck. The resuft was that many children died. About century ago, however, scientists found out about germs, and then everything (5) .....changed... The cause of many diseases (6) ......was.. known, and cures were developed. As this medical knowledge spread the world became (7)......much.... safer for children. The resuft is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (8)......live..... for years. And what do we except by the years 2010 ? Undoubtedly, (9)...medical.... science will continue to advance. Some people will be able to (10)......solve.... medical problems that are unavoidable today.

Exercise: Fill each blank in the following passage with one suitable word.Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1)...... of it. But illness can come, even (2) ........ we are young. In fact, childhood has been a very vulnerable time. Many (3)....... attacked children in particular and people knew very little about how to prevent such illness or how to (4)........ them one they struck. The result was that many children died. About...
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Exercise: Fill each blank in the following passage with one suitable word.

Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1)...... of it. But illness can come, even (2) ........ we are young. In fact, childhood has been a very vulnerable time. Many (3)....... attacked children in particular and people knew very little about how to prevent such illness or how to (4)........ them one they struck. The result was that many children died. About century ago, however, scientists found out about germs, and then everything (5)........ The cause of many diseases (6) ........ known, and cures were developed. As this medical knowledge spread the world became (7)........... safer for children. The result is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (8) ..... for years. And what do we except by the years 2010? Undoubtedly, (9) .......... science will continue to advance. Some people will be able to (10) ....... medical problems that are unavoidable today.

Mấy chế ơi giúp con vs ag! 

4
29 tháng 3 2016

- 1. aware

2. when

3. diseases

4. cure

5. changed

6. was

7. much

8. live

9. medical

10. solve

-> đúng tích ha 

29 tháng 3 2016

1. Aware

2. When

3. Diseases

4. Cure

5.Changed

6. Was

7. Much

8. Like

9. Medical

10. Solve

= > tích cko mk nhavui

 

Read the following passage and choose the best answer for each of the questions. Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward signs of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pet dog or cat include lass of playfulness and energy, a decline in hearing and eyesight, or even a slight...
Đọc tiếp

Read the following passage and choose the best answer for each of the questions.

Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward signs of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pet dog or cat include lass of playfulness and energy, a decline in hearing and eyesight, or even a slight graying of the coat. Plants age too, but the signs are much harder to detect.

Most body parts grow bigger and stronger, and function more efficiently during childhood. They reach their peak at the time of maturity, or early adulthood. After that, they begin to decline. Bones, for example, gradually become lighter and more brittle. In the aged, the joints between the bones also become rigid and more inflexible. This can make moving very painful.

All the major organs of the body show signs of aging. The brain , for example, works less efficiently, and even gets smaller in size. Thinking processes of all sorts are slowed down. Old people often have trouble in remembering recent events.

One of the most serious changes of old age occurs in the arteries, the blood vessels that lead from the heart. They become thickened and constricted, allowing less blood to flow the rest of body. This condition accounts, directly or indirectly, for many of the diseases of the aged. It may, for example, result in heart attack.

Aging is not a uniform process. Different parts of the body wear out at different rates. There are great differences among people in their rate of aging. Even the cells of the body differ in the way they age. The majority of cells are capable of reproducing themselves may times during the course of a lifetime. Nerve cells and muscle fibers can never be replace once they wear out.

Gerontologists- scientists who study the process of aging- believe this wearing out of the body is controlled by a built- in biological time clock. They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years.

1. What does the word “it” in line 2 refer to?

A. aging B. a living thing C. an illness D. an accident

2. All the followings may be the outward signs of aging EXCEPT ­________.

A. the graying of the hair B. the wrinkling of the skin

C. the decline in hearing and eyesight. D. the loss of appetite

3. When does the human body begin to lose vigor and the ability to function efficiency?

A. Soon after reaching adulthood B. During childhood

C. Early adulthood D. Past middle age

4. What happens to memorization when the brain begins to age?

A. It works less B. It becomes forgetful

C. It declines D. It slows down

5. According to the passage, which of the following is NOT true?

A. All living things grow old.

B. Aging is unavoidable in any livings things.

C. Plants show less signs of aging than any other living things.

D. Most body parts wear out during the courses of a lifetime.

2
3 tháng 2 2018

Read the following passage and choose the best answer for each of the questions.

Aging is the process of growing old. It occurs eventually in every living thing provided, of course, that an illness or accident does not kill it prematurely. The most familiar outward signs of aging may be seen in old people, such as the graying of the hair and the wrinkling of the skin. Signs of aging in a pet dog or cat include lass of playfulness and energy, a decline in hearing and eyesight, or even a slight graying of the coat. Plants age too, but the signs are much harder to detect.

Most body parts grow bigger and stronger, and function more efficiently during childhood. They reach their peak at the time of maturity, or early adulthood. After that, they begin to decline. Bones, for example, gradually become lighter and more brittle. In the aged, the joints between the bones also become rigid and more inflexible. This can make moving very painful.

All the major organs of the body show signs of aging. The brain , for example, works less efficiently, and even gets smaller in size. Thinking processes of all sorts are slowed down. Old people often have trouble in remembering recent events.

One of the most serious changes of old age occurs in the arteries, the blood vessels that lead from the heart. They become thickened and constricted, allowing less blood to flow the rest of body. This condition accounts, directly or indirectly, for many of the diseases of the aged. It may, for example, result in heart attack.

Aging is not a uniform process. Different parts of the body wear out at different rates. There are great differences among people in their rate of aging. Even the cells of the body differ in the way they age. The majority of cells are capable of reproducing themselves may times during the course of a lifetime. Nerve cells and muscle fibers can never be replace once they wear out.

Gerontologists- scientists who study the process of aging- believe this wearing out of the body is controlled by a built- in biological time clock. They are trying to discover how this clock works so that they can slow down the process. This could give man a longer life and a great number of productive years.

1. What does the word “it” in line 2 refer to?

A. aging B. a living thing C. an illness D. an accident

2. All the followings may be the outward signs of aging EXCEPT ­________.

A. the graying of the hair B. the wrinkling of the skin

C. the decline in hearing and eyesight. D. the loss of appetite

3. When does the human body begin to lose vigor and the ability to function efficiency?

A. Soon after reaching adulthood B. During childhood

C. Early adulthood D. Past middle age

4. What happens to memorization when the brain begins to age?

A. It works less B. It becomes forgetful

C. It declines D. It slows down

5. According to the passage, which of the following is NOT true?

A. All living things grow old.

B. Aging is unavoidable in any livings things.

C. Plants show less signs of aging than any other living things.

D. Most body parts wear out during the courses of a lifetime.

5 tháng 11

1. What does the word “it” in line 2 refer to?

A. aging B. a living thing C. an illness D. an accident

2. All the followings may be the outward signs of aging EXCEPT ­________.

A. the graying of the hair B. the wrinkling of the skin

C. the decline in hearing and eyesight. D. the loss of appetite

3. When does the human body begin to lose vigor and the ability to function efficiency?

A. Soon after reaching adulthood B. During childhood

C. Early adulthood D. Past middle age

4. What happens to memorization when the brain begins to age?

A. It works less B. It becomes forgetful

C. It declines D. It slows down

5. According to the passage, which of the following is NOT true?

A. All living things grow old.

B. Aging is unavoidable in any livings things.

C. Plants show less signs of aging than any other living things.

D. Most body parts wear out during the courses of a lifetime.

Everyone knows that honeybees make honey, but how do they actually do it? Honeybees live in colonies, which means that they live with lots of other bees. Beehives, nests made of wax, are the places where they live and stow their honey. Honeybees drink nectar from flowers or other sweet deposits from plants or trees. The honey made by these bees is used to supply the colony with food during the cold winter when there arc no flowers to drink from. Thus, these bees not only consume the nectar for...
Đọc tiếp

Everyone knows that honeybees make honey, but how do they actually do it? Honeybees live in colonies, which means that they live with lots of other bees. Beehives, nests made of wax, are the places where they live and stow their honey.

Honeybees drink nectar from flowers or other sweet deposits from plants or trees. The honey made by these bees is used to supply the colony with food during the cold winter when there arc no flowers to drink from. Thus, these bees not only consume the nectar for nourishment but also bring it home. They have a special organ called a honey stomach which is used to carry the food to their colony.

When honeybees come back home, they regurgitate what they have put in their honey stomachs. Other honeybees in the hive come along and help them. They repeatedly eat and regurgitate many times until the product becomes somewhat digested. Next, the bees move the syrupy product into open honeycomb cells. Then they beat their wings to fan it to prevent fermentation. The fanning makes the water evaporate so that the product gets thick enough. Now it cannot easily be attacked by bacteria. Finally, it can be called honey. After this process, honeybees seal up the honeycomb cells with wax until they are hungry.

The most impressive part of this process is how seamlessly a bee colony works together. In a colony, there are female worker bees, male drones, and one queen bee. Although there are both male and females in the hive, the majority of the work is done by females. The female worker bees are in charge of taking care of the hive and creating honey. When they are young, they take care of feeding the young bee larvae. When they are older, they go out and bring nectar back to the hive, where they begin making honey. The male drones are responsible for fertilizing the eggs, but require little energy as they spend their time waiting around the hive. The single queen bee is responsible for the colony's survival. She is the only female that can lay eggs. The wonderful substance called honey would not exist without the bees' teamwork.

1. What is the main topic of the passage?

A. The role of the female honeybee
B. Preventing fermentation in honey
C. Why honeybees build huge wax nests
D. How a honeybee colony works to make honey

2. What can be inferred from the passage about honey? A. It's not always the same color
B. It is only liked by a minority of people
C. Watery honey can go bad easily
D. It is created and cared for by the queen bee 3. What do honeybees do to prevent fermentation? A. Blow air on the honey by waving their wings
B. Overproduce honey using their legs
C. Feed the larvae the unfermented honey
D. Bring the honey to the honeycomb cells 4. According to the passage, which of the following is NOT true of honeybees? A. They work together in their colony.
B. They produce honey through a complex process
C. The queen bee is responsible for making honey
D The worker bees work both inside and outside of their hive.
0
2 tháng 5 2017

Đáp án: A

Giải thích: Dựa vào câu: “Many people had to live in houses made of straw and mud.”.

Dịch: Nhiều người phải sống trong những ngôi nhà làm từ rơm và bùn.

Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (66) ....of it. But illness can come, even (67)........ we are young. In fact, childhood has been a very vulnerable time. Many (68).....attacked children in particular and people knew very little about how to prevent such illness or how to (69).... them once they struck. The result was that many children died. About century ago, however, scientists found out about germs, and then...
Đọc tiếp
Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (66) ....of it. But illness can come, even (67)........ we are young. In fact, childhood has been a very vulnerable time. Many (68).....attacked children in particular and people knew very little about how to prevent such illness or how to (69).... them once they struck. The result was that many children died. About century ago, however, scientists found out about germs, and then everything (70)....... The cause of many diseases (71)..... known, and cures were developed. As this medical knowledge spread the world became (72)..... safer for children. The result is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (73)..... for years. And what do we except by the years 2010? Undoubtedly, (74..... science will continue to advance. Some people will be able to (75) ...... medical problems that are unavoidable today.
2
6 tháng 10 2018

Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (66) ..aware..of it. But illness can come, even (67)....when.... we are young. In fact, childhood has been a very vulnerable time. Many (68).diseases....attacked children in particular and people knew very little about how to prevent such illness or how to (69).cure... them once they struck. The result was that many children died. About century ago, however, scientists found out about germs, and then everything (70)...changed.... The cause of many diseases (71)...were.. known, and cures were developed. As this medical knowledge spread the world became (72)..much... safer for children. The result is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (73)..live... for years. And what do we except by the years 2010? Undoubtedly, (74) ..medical... science will continue to advance. Some people will be able to (75) ....avoid.. medical problems that are unavoidable today.

6 tháng 10 2018

cảm ơn nhìuyeu

20 tháng 2 2018

Đáp án: A

Giải thích: Dựa vào câu: “Their lives were very simple.”.

Dịch: Cuộc sống của họ rất đơn giản.

29 tháng 7 2019

Đáp án: A

Giải thích: Dựa vào câu: “They raise and resurface the roads so that the roads will not be muddy and flooded after it rains.”.

Dịch: Họ nâng và trải lại nhựa đường để các con đường không bị lầy bùn và lũ lụt sau mưa

Read the following passage, translate and write T (for TRUE) and F (for FALSE). Like most other hobbies, stamp colleting can be exhilarating, time-consuming and, for the uninitiated, overwhelming. Consider this - it is estimated that in the last 100 years alone, close to one billion diffrent stamps have been issued by governments all around the world. Not only that, but some of these stamps are as rare, and as expensive, as Renaissance paintings. The most famous is probably the upside-down...
Đọc tiếp

Read the following passage, translate and write T (for TRUE) and F (for FALSE).

Like most other hobbies, stamp colleting can be exhilarating, time-consuming and, for the uninitiated, overwhelming. Consider this - it is estimated that in the last 100 years alone, close to one billion diffrent stamps have been issued by governments all around the world. Not only that, but some of these stamps are as rare, and as expensive, as Renaissance paintings. The most famous is probably the upside-down airplane stamp, valued at almost 1 million dollars. Also the result of a printing mistake is the world's most expensive stamp, the Treskilling Yellow, so called because it was originally worth three shillings when issued in Sweden in 1855, and because it was supposed to be printed in green, this being the only known sample in yellow. This stamp was recently sold at auction for 1.7 milion pounds, making it the single most expensive item by weight in the world. Of course, amateur philatelists would do well to concentrate on a sub-section of the wonderful world that is philately, such as collecting every stamp issued by a certain government in a year, or collecting every stamp of a particular design, etc. Any other approach to this hobby is a sure fire recipe for frustration and perhaps for ruin.

1. This artical mainly tells hobbyists how to get into stamp collecting. ........

2. The most famous stamp is also the most expensive. ...........

3. Both of the stamps mentioned have printing mistakes. .........

4. The sale of the world's most expensive stamp was arranged through a private dealer. .......

5. The world's most expensive stamp was originally supposed to be green. .......C

CỐ GẮNG NHA MỌI NGƯỜI!!!

2
30 tháng 3 2017

Read the following passage, translate and write T (for TRUE) and F (for FALSE).

Like most other hobbies, stamp colleting can be exhilarating, time-consuming and, for the uninitiated, overwhelming. Consider this - it is estimated that in the last 100 years alone, close to one billion diffrent stamps have been issued by governments all around the world. Not only that, but some of these stamps are as rare, and as expensive, as Renaissance paintings. The most famous is probably the upside-down airplane stamp, valued at almost 1 million dollars. Also the result of a printing mistake is the world's most expensive stamp, the Treskilling Yellow, so called because it was originally worth three shillings when issued in Sweden in 1855, and because it was supposed to be printed in green, this being the only known sample in yellow. This stamp was recently sold at auction for 1.7 milion pounds, making it the single most expensive item by weight in the world. Of course, amateur philatelists would do well to concentrate on a sub-section of the wonderful world that is philately, such as collecting every stamp issued by a certain government in a year, or collecting every stamp of a particular design, etc. Any other approach to this hobby is a sure fire recipe for frustration and perhaps for ruin.

1. This artical mainly tells hobbyists how to get into stamp collecting. T

2. The most famous stamp is also the most expensive.T

3. Both of the stamps mentioned have printing mistakes. F

4. The sale of the world's most expensive stamp was arranged through a private dealer. F

5. The world's most expensive stamp was originally supposed to be green

30 tháng 3 2017

trời ơi, khó thế!

Anh Đức Minh ơi, giúp bọn em với!!!