[-B11] We went through a period ______ communications were very difficult in the rural areas.
题目
[-B11] We went through a period ______ communications were very difficult in the rural areas.
A.which
B.whose
C.in which
D.with which
翻译并分析
答案C
答案
首先找 when ,选项中没有when
找带介词的which来替代when
为什么选in which ,因为 原句可以改为 communications were very difficult in this period
所以要选带in的.
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．
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