哈哈碼工急中生智想起了杠杆，力的分解，平麵和滾動摩擦力等老早學過的東東。首先應想到用專業工具避免受傷。

來源: IEbird 於 2024-04-16 08:43:15 [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.