A man was sitting in a cafe,____the sad music playing on an old tape recorder.
题目
A man was sitting in a cafe,____the sad music playing on an old tape recorder.
A.listening to B.hear C.to listen to D.listen to
答案
A 只能有一个谓语动词 并列的除外 这里用现在分词做伴随状语
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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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