you her do hear often singyou her do hear often sing连问句
题目
you her do hear often singyou her do hear often sing连问句
答案
Do you often hear her sing?你经常听见她唱歌吗?
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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