You can easily do a web search and find the average

来源: 屋漏痕 于 2009-12-29 08:13:13 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (137 bytes)

of each position you are interested in. However, average is average. What's reasonalbe to one person may not be reasonable to another.

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