what does everybody do at the same time?how long should your legs be?
题目
what does everybody do at the same time?how long should your legs be?
what has four legs and a back but can not walk
答案
Ok ,lady,let me tell you something with four legs and a back but can not walk ,for example ,a desk(桌子) ,a stool (凳子) and so on.Wish you good luck ,and I really hope you can understand.
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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