请教新东方Section 5 第19题

buickbuick

Recent estimates predict that between 1982 and 1995 the greatest increase in the number of people employed will be in the category of low-paying service occupations. This category, however, will not increase its share of total employment, whereas the category of high-paying service occupations will increase its share.

If the estimates above are accurate, which of the following conclusions can be drawn?

(A) In 1982 more people were working in low-paying service occupations than were working in high-paying service occupations.

(B) In 1995 more people will be working in high-paying service occupations than will be working in low-paying service occupations.

(C) Nonservice occupations will account for the same share of total employment in 1995 as in 1982.

(D) Many of the people who were working in low-paying service occupations in 1982 will be working in high-paying service occupations by 1995.

(E) The rate of growth for low-paying service occupations will be greater than the overall rate of employment growth between 1982 and 1995.

arundhati

你的疑惑是什么啊，请下次贴出答案，和你的具体疑惑，好方便我们讨论。

这道题应该选A。

这象是一道数学题，低收入职位的人数增多得最多，但在被雇佣人中所占比例没有增加。然而，高收入群体所占的比例增加了。从这可以看出低收入人群的基数很大所以在人数增长最多的情况下比例会不变。

举个例子：100个被雇佣的人，70个低收入，30个高收入。如果收入增加了30个，高收入增加了20个，那么高收入所占比例增加了，但增加的绝对人数没有低收入的高。

如果想不通可以代数字算。请指教！

buickbuick

非常感谢。

xjlv128

晕……！！

明白了！

zxzhyzcy

以下是引用arundhati在2004-7-23 8:56:00的发言：

你的疑惑是什么啊，请下次贴出答案，和你的具体疑惑，好方便我们讨论。

这道题应该选A。

这象是一道数学题，低收入职位的人数增多得最多，但在被雇佣人中所占比例没有增加。然而，高收入群体所占的比例增加了。从这可以看出低收入人群的基数很大所以在人数增长最多的情况下比例会不变。

举个例子：100个被雇佣的人，70个低收入，30个高收入。如果收入增加了30个，高收入增加了20个，那么高收入所占比例增加了，但增加的绝对人数没有低收入的高。

如果想不通可以代数字算。请指教！

太感谢了！！！