As a student ,you should keep youself and your room______.
题目
As a student ,you should keep youself and your room______.
A.to clean B.clean C.cleaning D.cleaned
怎么发到音乐这里了 不好意思哈
答案
B keep +sth+adj.使某物保持.
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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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