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owenmorecn

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[此贴子已经被作者于2008-9-18 7:26:07编辑过]

遥遥G梦

xie xie!

hccchen

Thank you!! few questions~

11.

一堆东西里面有p和s,问p和s各多少

1）  取走一个p, p占总数 2/5

2）  取走两个p, p占总数1/4

我选C

Why is this C? a typo? will the 2.) be S? If its about S, what's the reason?

Thanks!!