送交者: 湘女 于 2012-01-12, 20:13:41:

回答: according to NIH, in 2002, by age , 70% of samples have sex. 由 steven 于 2012-01-12, 20:04:22:

• why NIH would care about China? (无内容) - steven (0 bytes) 2012-01-12, 20:36:48 (641118)
  • because it funds China. (无内容) - cornbug (0 bytes) 2012-01-12, 21:18:54 (641127)

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