IntheUnitedStates，30percentofthegrown—uppopulationhasa“weight”problem.Tomanypeople，thecauseisclear：theyeattoomuch.Butscientificexperimentsdolittletosupportthisidea.GoingbacktotheA

题目详情

In the United States ， 30 percent of the grown—up population has a “weight” problem. To many people ， the cause is clear ： they eat too much. But scientific experiments do little to support this idea. Going back to the America of 1910 we find that people were thinner than today ， yet they ate more food. In those days people worked harder physically ， walked more ， used machines much less ， and didn’t watch television.

Several modern studies ， besides ， have shown that fatter people do not eat more on average than thinner people. In fact ， some research work ， such as l970 study of 3 545 London Office workers ， reports that fat people eat less than thinner people on the average.

Studies show that thin people are more active than fat people. A study by the research group of School of Medicine at Stanford University found the following interesting facts. The more a man ran ， the greater body fat he lost. The more he ran ， the greater he needed for food. Thus ， those who ran the most ate the most ， yet lost the greater amount of body fat.

1 What kind of physical problem do many grown-up Americans have?

A. They are too thin.

B. They work too hard.

C. They are too fat.

D. They lose too much body fat.

2. Based on the information given in this article ， suppose there are 500 Americans ， about how many of them will have a “weight” problem?

A. 30 　　 B. 50 　　 C. 100 　　 D. 150

3. What have modern medical and scientific researches reported to us?

A. Fat people eat less food and are less active.

B. Fat people eat more food and are more active.

C. Fat people eat more food but lose greater amount of body fat.

D. Thin people run less but eat more food.