In the United States 30 percent of the adult population has a “weight problem”. To many people, the cause is clear: We eat too much. But scientific evidence does 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(体力地), walked more, used machines much less, and didn’t watch television.
Several modern studies, moreover, have shown that fatter people don’t eat more on average(平均)than thinner people. In fact, some investigations, such as a 1970 study of 3,545 London office workers, report that, on balance, fatter people eat less than slimmer people.
Studies show that slim people are more active than fat people. A study by a research group at Stanford University School of Medicine found the following interesting facts.
The more the men ran, the greater loss of body fat.
The more they ran, the greater their increase in food intake(吸收).
Thus those who ran the most ate the most, yet lost greatest amount of body fat.
1.What kind of physical problem do many adult Americans have?
A.They are too slim.
B.They work too hard.
C.They are too fat.
D.They lose too much body fat.
2.Is there scientific evidence to support eating too much is the cause of a “weight problem”?
A.Yes, there is plenty of evidence.
B.Of course, there is some evidence to show this is true.
C.There is hardly any scientific evidence to support this.
D.We don’t know because the information is not given.
3.In comparison with the adult American population today, the Americans of 1910 _______.
A.ate more food and had more physical activities
B.ate less food but had more activities
C.ate less food and had fewer physical exercises
D.had more weight problems
4.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 than slim people and are more active.
C.Fat people eat more food than slim people but are less active.
D.Thin people run less, but have greater increase in food intake.