The question is so difficult that no one can answer it.改为同义句
题目
The question is so difficult that no one can answer it.改为同义句
答案
1.The question is too difficult to answer.
2.It is such a difficult question that no one can answer it.
3.It is such a difficult queston as no one can answer.
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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