OG 上一道逻辑题，快考试了！求大神解答！谢谢！

hello_yyxUID: 3496065

A ten-year comparison between the United States and the Soviet Union in terms
of crop yields per acre revealed that when only planted acreage is compared,
Soviet yields were equal to 68 percent of United States yields. When total
agricultural acreage (planted acreage plus fallow acreage) is compared, however,
Soviet yield was 114 percent of United States yield.
From the information above, which of the following can be most reliably inferred
about United States and Soviet agriculture during the ten-year period?
A A higher percentage of total agricultural acreage was fallow in the United
States than in the Soviet Union.
B The United States had more fallow acreage than planted acreage.
C Fewer total acres of available agricultural land were fallow in the Soviet
Union than in the United States.
D The Soviet Union had more planted acreage than fallow acreage.
E The Soviet Union produced a greater volume of crops than the United
States produced.

yyt913UID: 3512556

楼主咋不说说问题在哪？
……我来抛个砖。。。。
文章说，1. 如果只针对planted area，苏联的crop yields per acre比美国的crop yields per acre小。
            2. 如果针对所有的area，包括planted 和 fallow，苏联的crop yields per acre比美国的crop yields per acre大。
为啥呢，因为美国的fallow拉低了平均水平。为啥美国的fallow可以拉低平均水平苏联的没拉低呢- -（其实是苏联拉低的没美国厉害）……为啥美国拉低的厉害呢。。。（因为人家fallow的比例高啊，一拉就拉下来了）。。所以A。。
另：全篇都在讲comparison，故BD选项貌似难入选。。（不知道这样做对不对。。）C的available land全文没讲。。E的话。。 volume of crops 也是没讲。。

嘿嘿- -

hello_yyxUID: 3496065

yyt913 发表于 2014-5-14 14:32
楼主咋不说说问题在哪？
……我来抛个砖。。。。
文章说，1. 如果只针对planted area，苏联的crop yields ...

感谢啊！明白了！一直错误以为原文在比面积。
结果原文在比产量，题目在比面积