these stamps are from china.对china提问.
题目
these stamps are from china.对china提问.
I’ve got a chinese stamp.（chinese stamp画线）改为一般疑问句,改为否定句,对划线部分提问
答案
句子分别是：
Where are these stamps from?
Have you got a chinese stamps
I haven't got a chinese stamps
What have you got?
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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