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标题: 新prep cr1 120 [打印本页]

作者: reginechen    时间: 2012-5-5 09:54     标题: 新prep cr1 120

From 1973 to 1976, total United States consumption of cigarettes increased 3.4 percent, and total sales of chewing tobacco rose 18.0 percent.  During the same period, total United States population increased 5.0 percent.
If the statements above are true, which of the following conclusions can be properly drawn?
A. United States manufacturers of tobacco products had higher profits in 1976 than in 1973.
B. Per capita consumption of cigarettes in the United States was lower in 1976 than in 1973.
C. The proportion of nonsmokers in the United States population dropped slightly between 1973 and 1976.
D. United States manufacturers of tobacco products realize a lower profit on cigarettes than on chewing tobacco.
E. A large percentage of United States smokers switched from cigarettes to chewing tobacco between 1973 and 1976.


这里香烟只增加了3.4%,烟草却增加了18%,人口只增加5%,说明烟草的人均使用量增加,E错在哪里呢?
是因为可能以前抽香烟的人,同时也开始使用烟草了吗?所以不一定在从一个转移到只消费另一个。求解答
作者: myungryong    时间: 2012-5-6 08:38

How do you know the increase in chewing tabacoo is caused by the

switch?  

This is a must-be-true type of questions. The correce answer choice has

to be found in the passage without adding any outside information.
作者: reginechen    时间: 2012-5-7 06:31

谢谢解答,明白了




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