1.They were in hospital lask week.改为一般疑问句
题目
1.They were in hospital lask week.改为一般疑问句
2.The food there is tasty.改为否定句
答案
Were they in hospital last week?
the food there is not tasty.
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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