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In each of the years 1983 and 1984, the total number of automobiles sold in the United States was 1.2 million more than in the p
In each of the years 1983 and 1984, the total number of automobiles sold in the United States was 1.2 million more than in the p
admin
2009-05-19
30
问题
In each of the years 1983 and 1984, the total number of automobiles sold in the United States was 1.2 million more than in the previous year.
Column A Column B
Percent increase in the number of automobiles Percent increase in the number of automobiles
sold in 1983 over 1982 sold in 1984 over 1983
选项
A、if the quantity in Column A is greater
B、if the quantity in Column B is greater
C、if the two quantity are equal
D、if the relationship cannot be determined from the information given
答案
A
解析
在1983年和1984年这两年的每一年中美国汽车的总销售量均比前一年增加120万辆。
解:本题的正确答案为(A)。比较的左项为1983年比1982年汽车销售数量增长的百分数,比较的右项为1984年比1983年汽车销售数量增长的百分数。因为题目中未给出1982年的汽车销售量,所以某些考生认为该题无法进行比较。其实不然,考生经仔细分析都会发现,两个百分数的大小虽然不能确定,但是他们的相对大小还是可以确定的:设1982年销售汽车x万辆,则1983年比1982年销售增长的百分比=120/x,1984年比1983年增长的百分比=120/(x+120),两个百分比的分子相同,但分母不同,显然x
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