英语翻译
题目
英语翻译
由于他们的不合作,导致我们一直没有办法收到文件.因为已经拖了很多天,我担心会造成延误,所以让他们直接将文件寄给你了,我自己没有收到过.
答案
We hadn't received the documents because they are uncooperative.Since it has been delayed for several days,I'm afraid of possible postponement to you.So I asked them to directly send the documents to you.I've never received them.
举一反三
已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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