he gave us a nod and murmured a yes after (what)seemed like hours.为什么不是that/which/it
题目
he gave us a nod and murmured a yes after (what)seemed like hours.为什么不是that/which/it
答案
what 这里和 that which 有相同作用,
从句的另一个说法是
after (a period of time which) seems like hours
what 就是 a period of time which 的替代词
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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