錯！！三腳架要比圓規穩定得多！！打回去複習物理課。

來源: π 於 2011-04-28 15:37:52 [舊帖] [給我悄悄話] 本文已被閱讀：次

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錯！！ 三腳架要比圓規穩定得多！！ 打回去複習物理課。