题目内容

D

The food we eat seems to have deep effects on our health.Although science has made enormous steps in making food more fit to eat ,it has, at the same time,made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well,especially cancer of the colon. Different cultures are more likely to cause certain different illnesses because of the food that is characteristic in these cultures. That food is related to illness is into a new discovery. In 1945, about 35 years ago, government researchers realized that nitrates(硝盐酸), commonly used to preserve color in meats,and other food additives,caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives which we eat are not all so direct. Farmers often give penicillin to beef and living animals, and because of this ,penicillin has been found in the milk of treated cow. Sometimes similar drugs are given to animals not for medical purposes,but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration(FDA) has tried repeatedly to control these procedures, the practices continue.

67.What is the best possible title of the passage?

       A.Drug and Food   B.Cancer and Health

       C.Food and Health D.Health and Drug

68.The word “carcinogenic” underlined most nearly means '_____'.

       A.trouble-making   B.color-retaining    C.money-making    D.cancer-causing

69.Which of the following statements is NOT true?

   A.Drugs are always given to animals for medical reasons

   B.Some of the additives in our food are added to the food itself and some are          

      given to the living animals

   C.Researchers have known about the potential dangers of food additives for over                  

     thirty-five years.

   D.Food may cause forty percent of cancer in the world.

70.How has science done something harmful to mankind?

   A.Because of science , diseases caused by polluted food have been virtually wiped out

   B.It has caused a lack of information concerning the value of food.

   C.Because of the application of science,some potentially harmful substances have been added

     to food.

   D.The scientists have preserved the color of meats,but not of vegetables.

67---70   CDAC    

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Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today, nearly two—thirds of the world’s population live within 80 kilometers of the sea coast.
In the modern technological world, the sea offers many resources to help mankind survive. Resources on land are beginning to be used up. The sea, however, still can be hoped to supply many of man’s needs.
The list of riches of the sea yet to be developed by man’s technology is immense. Oil and gas explorations have been carried out for nearly 30 years. Valuable amounts of minerals exist on the ocean floor ready to be mined.
Fish farming promises to be a good way to produce large quantities of food. The culture of fish and shellfish (贝类动物) is an ancient skill practised in the past mainly by Oriental people.
Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam in a steamship. Ocean currents and waves offer possible use as a source of energy.
Technology is enabling man to explore ever more deeply under the sea. The development of strong, new materials has made this possible.
The technology to harvest the sea continues to improve. Experts believe that by the year 2020 the problems that prevent us from exploiting fully the food, minerals, and energy sources of the sea will be largely solved.
1. The major things that the sea offers man are ______.
A. fish and oil                           B. minerals and oil
C. warm temperature and ocean currents       D. the food, energy sources, and minerals
2. The sea serves the needs of man because ______.
A. in provides man with food              B. it offers oil to man
C. it supplies man with minerals            D. all of the above
3. We can conclude from this passage that ______.
A. the sea resources have largely been used up
B. the sea, in the broad sense, has not yet been developed
C. the problems that prevent us from using the food, minerals, and energy sources of the
sea have already been solved.
D. by the year 2000 , the technology will be good enough to exploit all the sea resources
4. The underlined words Oriental people in the fourth paragraph probably mean ______.
A. the people in Asia                  B. African people
C. European people                   D. American people
5. The best title for this passage is ______.
A. Sea Harvest                       B. Sea Food
C. Technology for Exploiting the Sea     D. Man and the Sea

Why would an animal kill itself? It seems a strange question, and yet it is one that has made some scientists curious for a long time. For there is a kind of animal called lemming(旅鼠), that periodically killed themselves together, and no one knows just why!

The small creatures which live in the Scandinavian mountains, feed on a diet of roots and special insects and live in nests they dig underground. When their food supply is large, the lemmings live a normal and undisturbed life. 

However, when the lemmings’ food supply becomes too low to support the population, a singular migration(迁徙)begins. The lemmings leave their nests in groups. Great numbers of them begin to travel across the Scandinavian plains, a journey that may last weeks. The lemmings eat everything in their path, continuing their long march until they reach the sea. 

The reason for what follows remains unbelievable to naturalists. Upon reaching the coast, the lemmings do not stop but swim by the thousands into the sea. Most stay afloat only a short time before they tire, sink and drown. 

A common theory for this mass self-killing is that the lemmings do not realize that the ocean is such a huge body of water in their cross-country journey, the animals must cross many smaller bodies of water, such as rivers and small lakes. They may think that the sea is just another such swimmable path to go through. But no final answer has been found to the strange happening. 

1.The passage is mainly about______.

A. how lemmings find food

B. why animals kill themselves

C. the lemmings’ self-killing

D. the food supply in the Scandinavian mountains

2.A reason for the lemmings’ self-killing might be that they______.

A. go mad from a lack of food

B. hope to find fish for food

C. decide to reduce the population

D. think they can cross the sea

3.Why are scientists curious about the lemmings’ behavior?

A. Because they are the only animals that live in Scandinavia.

B. Because it is very unusual for animals to kill themselves.

C. Because of the amount of food they can eat on their march to the sea.

D. Because they can gather together in such huge numbers.

4.The underlined word “singular” means______.

A. unusual       B. single       C. wonderful      D. common

 

Why would an animal kill itself? It seems a strange question, and yet it is one that has made some scientists curious for a long time. For there is a kind of animal called lemming(旅鼠), that periodically killed themselves together, and no one knows just why!

The small creatures which live in the Scandinavian mountains, feed on a diet of roots and special insects and live in nests they dig underground. When their food supply is large, the lemmings live a normal and undisturbed life. 

However, when the lemmings’ food supply becomes too low to support the population, a singular migration(迁徙)begins. The lemmings leave their nests in groups. Great numbers of them begin to travel across the Scandinavian plains, a journey that may last weeks. The lemmings eat everything in their path, continuing their long march until they reach the sea. 

The reason for what follows remains unbelievable to naturalists. Upon reaching the coast, the lemmings do not stop but swim by the thousands into the sea. Most stay afloat only a short time before they tire, sink and drown. 

A common theory for this mass self-killing is that the lemmings do not realize that the ocean is such a huge body of water in their cross-country journey, the animals must cross many smaller bodies of water, such as rivers and small lakes. They may think that the sea is just another such swimmable path to go through. But no final answer has been found to the strange happening. 

1.The passage is mainly about______. 

A. how lemmings find food

B. why animals kill themselves

C. the lemmings’ self-killing

D. the food supply in the Scandinavian mountains

2.A reason for the lemmings’ self-killing might be that they______. 

A. go mad from a lack of food

B. hope to find fish for food

C. decide to reduce the population

D. think they can cross the sea

3.Why are scientists curious about the lemmings’ behavior?

A. Because they are the only animals that live in Scandinavia.

B. Because it is very unusual for animals to kill themselves.

C. Because of the amount of food they can eat on their march to the sea.

D. Because they can gather together in such huge numbers.

4.The underlined word “singular” means______.

A. unusual       B. single       C. wonderful      D. common

 

 

  Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today, nearly two—thirds of the world’s population live within 80 kilometers of the sea coast.

    In the modern technological world, the sea offers many resources to help mankind survive. Resources on land are beginning to be used up. The sea, however, still can be hoped to supply many of man’s needs.

    The list of riches of the sea yet to be developed by man’s technology is immense. Oil and gas explorations have been carried out for nearly 30 years. Valuable amounts of minerals exist on the ocean floor ready to be mined.

    Fish farming promises to be a good way to produce large quantities of food. The culture of fish and shellfish (贝类动物) is an ancient skill practised in the past mainly by Oriental people.

    Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam in a steamship. Ocean currents and waves offer possible use as a source of energy.

    Technology is enabling man to explore ever more deeply under the sea. The development of strong, new materials has made this possible.

    The technology to harvest the sea continues to improve. Experts believe that by the year 2020 the problems that prevent us from exploiting fully the food, minerals, and energy sources of the sea will be largely solved.

1. The major things that the sea offers man are ______.

   A. fish and oil                           B. minerals and oil

   C. warm temperature and ocean currents       D. the food, energy sources, and minerals

2. The sea serves the needs of man because ______.

   A. in provides man with food              B. it offers oil to man

   C. it supplies man with minerals            D. all of the above

3. We can conclude from this passage that ______.

   A. the sea resources have largely been used up

   B. the sea, in the broad sense, has not yet been developed

   C. the problems that prevent us from using the food, minerals, and energy sources of the

     sea have already been solved.

   D. by the year 2000 , the technology will be good enough to exploit all the sea resources

4. The underlined words Oriental people in the fourth paragraph probably mean ______.

   A. the people in Asia                  B. African people

   C. European people                   D. American people

5. The best title for this passage is ______.

   A. Sea Harvest                       B. Sea Food

   C. Technology for Exploiting the Sea     D. Man and the Sea

 

Man, a land animal. But he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today, nearly two-thirds of the world’s population live within 80 kilometers of the sea coast.

    In the modern technological world, the sea offers many resources to help mankind survive. Resources on land are beginning to be used up. The sea, however, still can be hoped to supply many of man’s needs.

    The list of riches of the sea yet to be developed by man’s technology is big. Oil and gas explorations have been carried out for nearly 30 years. Valuable amounts of minerals exist on the ocean floor ready to be mined.

    Fish farming promises to be a good way to produce large quantities of food. The culture of fish and shellfish (贝类动物) is an ancient skill practised in the past mainly by Oriental people, including people in China.

    Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam in a steamship. Ocean currents and waves offer possible use as a source of energy.

    Technology is enabling man to explore ever more deeply under the sea. The development of strong, new materials has made this possible.

    The technology to harvest the sea continues to improve. Experts believe that by the year 2020 the problems that prevent us from exploiting(开发) fully the food, minerals, and energy sources of the sea will be largely solved.

1.The major things that the sea offers man are ______.

A. fish and oil                        

B. minerals and oil

    C. warm temperature and ocean currents   

D. the food, energy sources, and minerals

2.We can conclude from this passage that ______.

    A. the sea resources have largely been used up

    B. the sea, in the broad sense, has not yet been developed

    C. the problems that prevent us from using the food, minerals, and energy sources of the sea have already been solved.

    D. by the year 2020, the technology will be good enough to exploit all the sea resources

3.The underlined words “Oriental people” in the fourth paragraph probably mean ______.

    A. the people in Asia                       B. African people

    C. European people                          D. American people

4.The best title for this passage is ______.

    A. Sea Harvest                              B. Sea Food

    C. Technology for Exploiting the Sea            D. Man and the Sea

 

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