英语作文 对人有礼貌!
题目
英语作文 对人有礼貌!
答案
Good manners are necessary because one is judged by his manners.One’s manners not only show what kind of education he has received and what his social position is,but they also tend to show what his ...
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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