rich people need it,poor people need it,and if yo
题目
rich people need it,poor people need it,and if yo
一个英语谜题 求解
答案
nothing
Poor people have nothing,rich people need nothing,if you eat nothing you will die.
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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