The doctors and nurses are in the hospital.(对划线部分提问）划得是in the hospital
题目
The doctors and nurses are in the hospital.(对划线部分提问）划得是in the hospital
___ __the doctors and nurses?
They're having an English lesson (改为否定句）
They ___ ___ an English lesson.
答案
Where are the doctors and nurses?
aren't having
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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