The problem which ___at the meeting now is of great importance.
题目
The problem which ___at the meeting now is of great importance.
A is discussing B being discussed C is being discussed D is to be discussed答案是C 为什么呢
答案
有now ,表示正在进行,用现在进行时态
这个问题是被讨论,用被动语态
综合起来选C
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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