The book is really good.we should read it.合成一句!The book is really?
题目
The book is really good.we should read it.合成一句!The book is really?
答案
The book is really good enough to read.
The book is so good that we should read it.
The book is worth reading.
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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