问题
单项选择题
政府给予某种运输服务以补贴时( )。
A．运价上涨，需求量降低
B．运价降低，需求量增加
C．运价降低，需求量降低
D．运价上涨，需求量增加
答案
参考答案：B
解析： 本题考查的是补贴对运输供求的影响。政府给予某种运输服务以补贴时，运价降低，需求量增加。
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政府给予某种运输服务以补贴时( )。
A．运价上涨，需求量降低
B．运价降低，需求量增加
C．运价降低，需求量降低
D．运价上涨，需求量增加
参考答案：B
解析： 本题考查的是补贴对运输供求的影响。政府给予某种运输服务以补贴时，运价降低，需求量增加。
In the United States, 30 percent of the people have a “weight problem”。To many people the cause is obvious (明显的): they eat too much. But scientific evidence (证据) does little to support this idea. Going back to 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, moreover, have shown that fatter people don’t eat more on average than thinner people. A 1979 study of 3,545 London office workers showed that fat people eat less than slim (苗条的) people. Studies also show that slim people are more active than fat people. A study by a research group at Stanford University found the following interesting facts: The more the man ran, the greater loss of the body fat The more they ran, the greater increase in food intake. Thus, those who ran the most ate the most, yet lost the greatest amount of body fat. 小题1: Nowadays many Americans have the problem that ______.
 ing to the passage, how many people in 900 Americans have a “weight problem”?
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