this kind of pets are popular 还是 this kind of pet is interesting哪个正确
题目
this kind of pets are popular 还是 this kind of pet is interesting哪个正确
this kind of pets are popular 还是 this kind of pets is interesting哪个正确
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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