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已知集合A=｛1,2｝,B｛（a,b）,（c,d）｝,则从集合A到集合B的映射共有几个?并将他们分别表示出来?如何表示啊 已知两个集合A={1,2,3},B={a,b,c,d,e},从A到B建立映射,问可建立多少个不同的映射? Hey是啥意思 请问hey是啥意思? latex \arabic在Latex中是什么意思 hey的意思 麻烦检查一下这句话的时态对不对,谢谢啦As men around him begin to flee, Henry lost his nerve and ran in terror. The notion about red badge in Henry’s heart accept me for who I am 请问这里的for是什么意思?who I 翻译成，接受我，因为这就是我？还是，接受真正的我？ To speak English well for us is diffcult.(改为同义句)_ _ _ _ us _speak English well. 将Pass the hall like this改为否定句快 Which is ______ (far)of the three cities?(根据括号里的单词选择正确的形式准确填空） latex 中 \ra used 的几种用法的区别用自己的语言概括,不要复制粘贴的,不要太抽象的,易懂最好,sth.be used to dosth.be used for doingsb.be used to doingsb.used to dosth.be used to do 某物被用来干…… sth.be used for doing 某物 I failed in the exam again,and the d____ look on my father's face made me even more upset. 关于used的全部用法带翻译的最好 they require some kind of incentives in the form of victory over others or humiliation when defeated.without competition they will lose their drive to better themselves.看了半天没看懂什么意思 还有drive to snatches defeat from the jaws of victory" 英语翻译형한테 팬레터 보내 손편지로다가 구럼 관리대상리스트에 넣어줄께 ㅋ your defeat now is you victory in the future什么意思? 能否给翻译一下呢?麻烦您了 I want to rely on you always beside me to lead the way 英语翻译would you have an e - catalogue where to choose from collection ,if so pls send and copy to william.hebel@gmail.com for heavy mails bring on和lead to 都是导致的意思,二者有什么区别?该怎么用? used 的几中用法 那位英语好的能指点一下 请各位指点英语中used to 的用法?最好说得详细些 英语翻译3 is the remainder when 2p+7 is divided by 5这句话怎么翻译是2p+7除以5的余数是3还是2p+7被5除的余数是三? 16除以4等于4.（divide)翻译成英语 有一份关于电脑设备维护的合同想翻译成英文, My father had given me a book and I lost it.请问哪里错了?这样说还是不是太清楚。我把我父亲给我的那本书丢掉了。父亲给我，是先发生的，用过去完成时，我丢掉了，是后发生的，用过去时。这样 let me be your winter warmer 和 let me be with you 这两句英语是啥意思? would you let me borrow your old winter coat 是哪首歌里的歌词?