有关笑的英语谚语
题目
有关笑的英语谚语
答案
He is not laughed at that laughs at himself first.
自嘲者不会让人见笑.
He laughs best who laughs last.
谁笑到最后,谁笑得最好.
Not to know what happened before one was born is always to be a child.
不懂世故,幼稚可笑.
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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