they want to help() a.we b.us c.our there ()many people in the park a.am b.is c.are
题目
they want to help() a.we b.us c.our there ()many people in the park a.am b.is c.are
答案
they want to help us
there are many people in the park
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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