你說的是物理嗎? 俺家孩子沒怎麽用過可汗家的數學教程.

來源: Pilsung 於 2025-01-16 15:08:47 [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.