求教一道CR题

sonnetsue

Surveys in Domorica indicate that only 10 percent of Domoricans in their twenties read a newspaper regularly, while more than half of all Domoricans over thirty read a newspaper regularly. Although Domoricans in their twenties constitute a large proportion of the population, newspaper publishers nonetheless predict that ten years from now, the percentage of Domoricans who regularly read a newspaper will probably be no lower than it is today.
Which of the following, if true, provides the strongest grounds for the newspaper publishers’ prediction?
A. The number of Domoricans in their twenties is less than the number of Domoricans over thirty.
B. The number of newspapers in Domorica has been gradually increasing over the past several decades.
C. The proportion of Domoricans in their twenties who regularly read a newspaper has always been low.
D. The surveys defined a regular reader of a newspaper as someone who reads a newspaper more than twice a week.
E. The proportion of Domoricans who regularly read a newspaper was higher 20 years ago than it is today.

Key: C

不理解，哪位高人解释一下

hoyancyn

答案是选C
首先看A，肯定不对，如果二十岁的人数比三十岁的人数多的话，十年以后三十岁的人肯定要比现在少（因为他们就是现在的二十岁的人），而正如题中所说三十岁读书的人超过一半，而二十岁只有百分之十，那么这个得到结论正好与题中publishers得出的是相反的。
B，更不沾边，报纸的数量与人们读不读它是没有必然关系的。
C，很好的支持了publishers的推论，试想，这个百分之十的比例in their twenties一直保持这么低的话，那么这些人到了三十岁读报纸的人数必然会大于现在。举个例子，比如二十岁的人有100人 ，而读报纸的比例百分之十，即只有这是个人在他们二十岁到三十岁读报纸，而十年之后这些人都三十岁了，这个比例超过了百分之五十，即50人，这是必然会导致读报纸人数的增加的。
D，不知道在说什么，完全没有关系啊。
E，与二十年前的比较也无法得到什么。

sonnetsue

但是题目问的是比例不是人数啊？

jingjane

说白了就是always be low怎么也比lower and lower强。。哈哈

francoisw

太喜欢分析，考试时有用吗？
问题支持predication->percentage->low than today
只看主语发现
A、B number，干掉。不是指percentage
D   瞎扯干掉
C、E说proportion和percentage意思差不多，留下
E说higher than today，与结论相反了，不是支持，干掉
C 说always low 还成