The back garden of our house contains a lawn,_____ very pleasant to sit on in summer.
题目
The back garden of our house contains a lawn,_____ very pleasant to sit on in summer.
A.which is B.which it is C.it is D.where it is
我就在纠结A和B.我觉得A是对的,可答案是B.网上到处A、B的答案都有,众说纷纭.到底为什么?
答案
该选B,which指代a lawn ,which在从句中做to sit on 的介词宾语.后面从句还原为It’s very pleasant to sit on which in summer. to sit on which又做从句的逻辑主语.
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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．
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