Here you go. xj need a poor example of "causal inference".
所有跟贴·加跟贴·新语丝读书论坛http://www.xys.org/cgi-bin/mainpage.pl
送交者: Latino2 于 2005-6-02, 17:35:13:
回答: He took 18000 mg Vitamin C everyday and RDA is only 60 mg 由 HunHunSheng 于 2005-6-02, 17:03:26:
所有跟贴:
加跟贴
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