a doctor and a lawyer loved the same girl.the iawyer went away for a week and gave the girl seven
题目
a doctor and a lawyer loved the same girl.the iawyer went away for a week and gave the girl seven
apples before he left.why?
答案
An apple a day,keep doctor away.
给她七个苹果,就能让医生远离她一周,就是他出差的这周咯~
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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