请帮我做这道题并讲解,谢谢___he first heard of that the compass was first invented in China.
题目
请帮我做这道题并讲解,谢谢___he first heard of that the compass was first invented in China.
A.It was from the teacher that B.It was the teacher whom C.That was from the teacher who .D .That was the teacher whom
答案
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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