The American student gave me English leassons () Chinese lessons
题目
The American student gave me English leassons () Chinese lessons
A.in exchange fo B.to exchange for C.in exchange with
答案
The American student gave me English leassons () Chinese lessons
是A
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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