帮我汉译英~~在线等~~
题目
帮我汉译英~~在线等~~
我发E-mail给他询问过课程的问题,他很热心的给我解答.
我不知道这算不算是认识(他).
口语一些
答案
1 I sent e-mail to him for some questions of the courses and he was very kind-hearted to help me.
2 I don't know does it means I am familiar with him.
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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