You can see pretty hills and beautiful rivers in Guilin.(就画线提问）
题目
You can see pretty hills and beautiful rivers in Guilin.(就画线提问）
答案
What can you see in Guilin?(pretty hills and beautiful rivers)Where can you see pretty hills and beautiful rivers?(in Guilin)What can you do in Guilin?(see pretty hills and beautiful rivers)
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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