There is none here,they must have gone to school意疑问句是什么
题目
There is none here,they must have gone to school意疑问句是什么
答案
Is there no one here?Have they gone to school?
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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