根据要求改写句子
题目
根据要求改写句子
1There are (nineteen) boys in this class.(对画线部分提问）
2Sue helps her mother wash up everyday 用what提问
3The girls of Class Four are mopping the floor in Mrs Lynn’s office用what 提问
4Mary never wears red clothes用who提问
答案
how many boys are there in that class?what dose sue help her mother do everyday?what are the girls of class four doing in mrs lynn's office?who never wears red clothes?
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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