能量=力量x距離，車撞牆，兩方受力是一樣大，什麽無限大乘無限小?

來源: khyang86 於 2018-10-11 19:53:51 [舊帖] [給我悄悄話] 本文已被閱讀：次

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

Change Ad Consent