the basics of electric propulsion were virtually unknown 17 years ago,while today there are electric
题目
the basics of electric propulsion were virtually unknown 17 years ago,while today there are electric motors everywhere.3922
答案
电子驱动的理念在17年前还是不为人知的,然而今天电子车却到处都是了
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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