A friend and I were stangding in line at the grocery store the other day ,and I was telling her how
题目
A friend and I were stangding in line at the grocery store the other day ,and I was telling her how
答案
A friend and I were standing in line at the grocery store the other day ,and I was telling her how
前两天我和一个朋友正在杂货店排队,我在告诉她的如何.
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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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