Wait a minute, let's see who forgot what after I got off work

来源: MoonRiverMe 于 2014-10-07 13:23:01 [档案] [旧帖] [给我悄悄话] 阅读数 : (0 bytes)

回答: Your question indicates that you forgot high school physics some 由 CW62 于 2014-10-07 12:27:16

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