用七句以上的英语给你的笔友写信介绍你的家庭.
题目
用七句以上的英语给你的笔友写信介绍你的家庭.
答案
Dear my friend,It has been two weeks since I received your letter.I am so sorry that I haven't written back soon.I miss you so much,but I had had an English exam.It is the reason.I want to intrduce my...
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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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