英语高手来帮我把这句改成被动语态再变成否定句和疑问句
题目
英语高手来帮我把这句改成被动语态再变成否定句和疑问句
They make TV sets in that factory.
答案
TV sets are made by them in that factory.
Are TV sets made by them in that factory?
TV sets are not made by them in that factory.
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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