求教！！

wellmichelle

Among those automobile mechanics who own their own garages and completed a qualifying course at Main Street Technical School, 35% earn above $80,000 a year. Among those who own their own garages but did not complete the qualifying course at Main Street Technical School, only 10% earn above $80,000 a year. These figures indicate the importance of technical education in getting a higher salary.

　　The argument above depends on which of the following assumptions about the people mentioned in the statistics?

A.At least one-third of the group of people who did not complete the qualifying course would today be earning more than $80,000 a year if they had completed the course.

B.The group of people who did not complete the qualifying course and the group who did are comparable in terms of factors that determine how much people are paid.

C.Most of those people who did not complete the course did so entirely because of the cost of the course.

D.As a group, those persons who completed the course are more competent as mechanics than the group that did not.


E.The group of people who did not complete the qualifying course and who today earn more than $80,000 a year are more capable than the group that completed the course

为啥选B?

HarrisZheng

就是排除它因

assumption有两种主要形式

第一： 是架桥  即把两个概念联系起来
第二：就是排除它因

B 说的就是 这两组人 其它的条件都一样 差别就是有证没证

我们可以取非验证一下 如果说他们还有其它差别 那结论就被削弱了 因为有可能是其它差别导致收入不同，而不是有没有证的原因。

yakev6

怎可看怎么像xdf烹饪学校的广告。。。
defending assumption 很明显的例子，支持LS

wellmichelle

are comparable 只是说可以比较的意思啊~并没有两种人一样吧！

wellmichelle

A为什么不行？？！！