shock at 怎么用?The mother was shocked at her only son —— when she was away for work.
题目
shock at 怎么用?The mother was shocked at her only son —— when she was away for work.
The mother was shocked at her only son —— when she was away for work.
A to do something illegal B doing something illegal C to have done something illegal
D done something illegal
答案
shock at..对.吃了一惊 可以接sb.doing sth.
选B
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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