Question

6．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．
29．Nowadays many Americans have the problem thatC．
A．they are too slim              
B．they work too hard
C．they are too fat           
D．they lose too much body fat
30．According to the passage，how many people in 900 Americans have a"weight problem"？D
A.150．B.300．C.600．D.270．
31．Is there any scientific evidence to support the idea that eating too much is the cause of a"weight problem"？C
A．Yes，there is plenty of evidence．
B．Of course，there is some evidence to support this．
C．There is hardly any scientific evidence to support this．
D．We are not sure．
32．The Americans in 1910A．
A．ate more food and had more physical activities
B．ate less food but had more physical activities
C．ate less food and had less physical activities
D．had more problems．

Answer 1

分析 本文属于议论文阅读，主要向我们介绍了如今在美国30%的人有体重问题，然而以前人们吃的更多却比现在要瘦，文章中分析了造成这个现象的原因：现在的人们缺乏运动，以前的人们虽然吃的多但是从事的体力劳动也多．

解答 29．C  细节理解题，根据第一段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．可知30%的美国人有体重问题，他们吃的太多，体重太重了，故选C．
30．D  细节理解题，根据第一段In the United States，30 percent of the people have a"weight problem"．可知30%的人有体重问题，900*30%=270个人，故选D．
31．C  细节理解题，根据第一段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．可知科学依据不支持吃太多是一个"体重问题"的原因，故选C．
32．A  细节理解题，根据第一段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．可知在1910年人们吃更多的食物但是却比现在瘦，他们从事更多辛苦的体力劳动，故选A．

点评 考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．