英语幽默故事一则[短的]
题目
英语幽默故事一则[短的]
答案
One day a Wolf,who was eating his dinner much too fast,swallowed a bone,which stuck in his throat and pained him very much.He tried to get it out,but could not.Just then he saw a Crane passing by.“De...
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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