这里大多是学科学的，有点基本的科学常识好不好？

来源: CirrusCloud 于 2013-05-06 08:32:32 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.

Change Ad Consent