Most human beings are as good as they are because some unsung teacher were there when needed
题目
Most human beings are as good as they are because some unsung teacher were there when needed
答案
大多数人都同他们一样优秀,因为总有一些默默无闻的老师,在社会需要他们时默默付出.
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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