She is going to spend the winter holiday in Macao,which returned to China in 1999 为何不用who引导
题目
She is going to spend the winter holiday in Macao,which returned to China in 1999 为何不用who引导
答案
因为,是要解释Macao这个地方的,当然不能用who了.
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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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