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标题: GWD T30 [打印本页]

作者: falcons 时间: 2005-6-19 06:47 标题: GWD T30

这道题应该是选e吧？答案居然是c

30:

What is the ratio of the average (arithmetic mean) height of students in class X to the average height of students in class Y?

(1) The average height of the students in class X is 120 centimeters.

(2) The average height of the students in class X and class Y combined is 126 centimeters.

作者: falcons 时间: 2005-6-23 06:41

thanks !!!

作者: sammen 时间: 2005-6-23 20:30

GWD里有不少答案是有问题的，不明白欢迎上来讨论。

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