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标题: lsat-1-4-21 [打印本页]

作者: dalunzi 时间: 2004-12-6 16:07
标题: lsat-1-4-21

21. A low-pressure weather system is approaching Plainville; rainfall results from about 70 percent of such systems in the Plainville area. Moreover, the current season, spring, is the time of year in which thundershowers, which sometimes result from low-pressure systems, are most likely to occur in Plainville.

Knowing which one of the following, in addition to the information above, would be most useful for determining the probability that Plainville will have a thundershower soon?

(A) the percentage of thundershowers in Plainville that occur in the spring

(B) the percentage of spring rainfalls in Plainville that are thundershowers

(D) whether low-pressure systems in other areas are associated with rainfall

(E) whether Plainville has more or fewer thundershowers each spring than do near by towns.

个人认为B/C 都有道理，而且C更准确。请指点！

作者: lawyer_1 时间: 2004-12-7 07:43
已回答过很多次，请到GMAT的逻辑区搜索。

作者: dalunzi 时间: 2004-12-8 10:43

斑竹啊，我发之前就到GMAT区用“lsat”搜索了，没有该题，所以一定是以“feifei”或“大全”名头出现的，那对我来说就是大海捞针了。

作者: lawyer_1 时间: 2004-12-8 11:21
关键理解原文rainfall results from about 70 percent of such systems in the Plainville area：意思为：低压系统的70%可能性导致rainfall 。那麽须要知道rainfall的多少可能性导致thundershowers。即B。C错在Percentage修饰thundershowers，不是修饰低压系统。它的意思为thundershowers的多大可能性来之于低压系统。而不是低压系统多大可能性导致thundershowers。这样就不可能从现在的低压系统推出多大可能性的thundershowers

作者: chelseayang 时间: 2004-12-8 11:28

我当时做题就觉得B比C 好的关键在于"SPRING"一词
rainfall results from about 70 percent of such systems + B 就可以得出起PRABABILITY

不过对C) ,LAWYER的解释很好，我都没有想到!

[此贴子已经被作者于2004-12-8 12:10:17编辑过]

作者: dalunzi 时间: 2004-12-9 10:31

谢谢两位版主指点。这种考试的确考准确理解的能力，我看了好几遍都很自然地理解成“低压系统多大可能性导致thundershowers”。

作者: mucully 时间: 2005-2-25 14:59

(D) whether low-pressure systems in other areas are associated with rainfall

请问D选项为何不对呢?

作者: kingdoms 时间: 2006-8-18 14:50

lawyer就是不一般,这个题这么解释真是十分正确.受教了.

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