送交者: Enlighten 于 2007-04-30, 19:35:04:

回答: A causes B = A and B 统计相关 + A happens before B all the time 由 008 于 2007-04-30, 18:52:03:

• A has to happen before B. In that case, how do you know it is not A-->B (无内容) - 008 (0 bytes) 2007-04-30, 20:19:44 (138305)

加跟贴