用英语介绍自己的教室 (不少于5句话)
题目
用英语介绍自己的教室 (不少于5句话)
答案
Our classroom is clean and tidy. It is big. There are forty desks and chairs in it. In the front of the classroom, there is a teacher's table. On the table, there are some beautiful flowers. We clean ...
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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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