大学英语(3)第二次作业题及答案.doc

第2次作业

一、阅读理解（本大题共100分，共5小题，每小题20分） 1.

Prehistoric men and women enjoyed a more varied diet than people do now, since they ate species of plant and several hundreds thousands types of living things. But only a tiny percentage of these were ever domesticated. Modern shops have hastened a trend towards specialization which began in the earliest days of agriculture. The food of the rich countries has become cheaper relative to wages. It is speedily distributed in supermarkets. But the choice annually becomes less and less great. Even individual foods themselves become more standardized. We live in the

world of carrot specially blunted in order to avoid making a hole in the bag, and the tomato grown to meet a demand for a standard weight of weighting tomatoes to a kilo. Siri von Reis asks: "Only the three major cereals (谷物类食物)and perhaps ten other widely cultivated species stand between famine and survival for the world" s human population and a handful of drug plants has served Western civilization for several thousand years. A rather obvious question arises: Are we missing something?” After all, there are 800 000 species of plant on earth.

(1). Tn prehistoric times people.

A.ate much more than we do today

B.lived mainly on plant food

C.had a wide-ranging diet

D.were more fussy about what they ate

(2).

Most of us have come to expect

A.

no variation in our diet

B. a reduction in food supplies

C. a specialist diet

D.

food conforming to a set standard

(3). The specialization of food was started by

A .

B . the emergence of supermarkets the rise of agriculture the rich countries the modern shops （4）.

According to the passage, people in the West today survive on.

A.carrots and tomatoes

B.several thousand types of plants and cereals

c.

a very small number of cultivated foods

D. special species planted one thousand years ago

（5）. The conclusion seems to be that we.

A.

could make use of more natural species

B.don't cultivate the right kind of food

c.

produce more food than we need

D.

cultivate too many different species

2.

human body is distributed （分布）in two different ways. Some fat people have a large chest and no waistline（腰身），looking rather like apples. Others are fatter below the waist, looking more like pears.

Doctors in Cambridge, England have been examining the relationship between health and fat （脂肪）distribution. They find that the pear- shaped fat people have fewer problems than the apple-shaped fat people. What seems to be most important is not how much fat you have but where you have it. The doctors measured the apple-shaped women and peai，--shaped women with X-ray scanners （X 光扫描器）.Human beings