用英文写教室的样子不少于3句
题目
用英文写教室的样子不少于3句
答案
Our classroom is very big and bright. There are forty desks and chars in it. Of course, there is a big teacher's desk in front of the classroom. There is a computer and a TV set, too. There is a bookc...
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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