There is some milk in the cup该成一般疑问句
题目
There is some milk in the cup该成一般疑问句
The old man goes swimming on Monday改成一般疑问句
答案
Is there any milk in the cup?
Does the old man go swimming on Monday?
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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