even if they are on sale,these refrigerators are equal in price to,if not more expensive than,the on
题目
even if they are on sale,these refrigerators are equal in price to,if not more expensive than,the ones at others store
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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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