不带这样玩的。我吭哧吭哧算了十几分钟,连积分都想到了,你倒好,来个脑筋急转弯。。。
所有跟帖:
• 哈哈哈,难为教授啦 :-) -爪四哥- ♂ (0 bytes) () 10/09/2020 postreply 06:28:08
• 这题是偏微分方程 -老生常谈12- ♂ (0 bytes) () 10/09/2020 postreply 10:46:38
• 哈哈哈,难为教授啦 :-) -爪四哥- ♂ (0 bytes) () 10/09/2020 postreply 06:28:08
• 这题是偏微分方程 -老生常谈12- ♂ (0 bytes) () 10/09/2020 postreply 10:46:38
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