英语作文my room 50个单词
题目
英语作文my room 50个单词
答案
My room isn't big but I like it very much.It's always clean and tidy.There is bed in my room.Beside the bed there is a desk and a chair.I often study and surf the iinternet there.There is a bookshelf ...
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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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