I know china is the country that have poplation of more than on billion
题目
I know china is the country that have poplation of more than on billion
这句话对吗 还是用with a population of
答案
I know china is a country with a population of more than on billion
I know china is a country which has a poplation of more than on billion
这两个都是对的
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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