求助大全-10-16

JayNicholas

In the 1970’s there was anoversupply of college graduates. The oversupply caused the average annualincome of college graduates to fall to a level only 18 percent greater thanthat of workers with only high school diplomas. By the late 1980’s the averageannual income of college graduates was 43 percent higher than that of workerswith only high school diplomas, even though between the 1970’s and the late1980’s the supply of college graduates did not decrease.
Whichof the following, if true, in the late 1980’s, best reconciles the apparentdiscrepancy described above?
(A) The economy slowed, thus creating adecreased demand for college graduates.
(B) The quality of high school educationimproved.
(C) Compared to the 1970’s, a greaternumber of high schools offered vocational guidance programs for their students.
(D) The proportion of the population withat least a college-level education increased.
(E) There was for the first time in 20years an oversupply of job seekers with only high school diplomas.

lxw19

答案选E

文中说从70年代到80年代，大学毕业生的收入与高中毕业生的收入差距拉大了~~但是大学生的供给并没有减少，也就是说大学生的工资不应该增加，那么为什么差距会拉大，那就要从那些高中毕业生的身上找原因了。。。也就是E，高中毕业生的供极度的大于需~~导致高中毕业生的竞争更加激烈，进而也导致了收入的减少~~所以差距就拉大了~~

songer_xj

E.
A供应多，平均薪水比下降了，为18%。
即，供应多，平均薪水比下降；

而后来，A供应不变，但平均薪水比上升了，为43%；反之，B的平均薪水比下降了（原来-18%，现在-43%）。应用前面的因果关系，可知B的供应是多了（从而导致B的平均薪水比下降）。