3分钟的英语文章,演讲用,
题目
3分钟的英语文章,演讲用,
不打算被选上,
答案
a ten dollar billSam waited patiently in the long line at the grocery store .He had come to pick up a few items for his mother.He often did chores for his parents after school.He enjioyed helping out ...
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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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