用at the same tine填 both millie and kitty are ciever.they worked out the problem----yesterday
题目
用at the same tine填 both millie and kitty are ciever.they worked out the problem----yesterday
答案
both millie and kitty are ciever.they worked out the problem--at the same time--yesterday
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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