把此句翻译成英文：这是一件很难解决的问题.This is the issue which is difficult to solve.
题目
把此句翻译成英文：这是一件很难解决的问题.This is the issue which is difficult to solve.
答案
对的.同时还有其他参考：
------ This is a very difficult issue to solve
--------This is a very hard issue (to deal with).
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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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