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标题: [求助]CXD page184第七题 [打印本页]

作者: wujie_rens 时间: 2006-9-8 06:54 标题: [求助]CXD page184第七题

CXD page184第七题

if a certain grove consists of 36 pecan tress, what was the yield per tree last year?

(1)the yield per tree for the 18 trees in the northern half of the grove was 60 kilograms last year.

(2)the yield per tree for the 18 trees in the eastern half of the grove was 55 kilograms last year.

这题为什么答案选E，我怎么觉得应该选C啊？不可以用（18×60＋18×55）/36求出吗？各位高手请帮我看看

作者: taohuaxianzi 时间: 2006-9-8 13:37

你上当了. 题目说NORTHERN + EASTERN, 不是NORTHERN + SOUTHERN, 或 WESTERN + EASTERN

作者: wujie_rens 时间: 2006-9-21 20:02

原来是这样，真是阴险啊呵呵，谢谢：）  

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