The really friend is someone who know the song in your heart and can sing it back to you when you f
题目
The really friend is someone who know the song in your heart and can sing it back to you when you f
答案
真正的朋友是那种知道你心灵深处的声音,而且能够在你.的时候唱给(说给)你听的人.
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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