( )by the famous professor,the young doctor went on with his research
题目
( )by the famous professor,the young doctor went on with his research
A Encouraged B Encourage C Encouraging D To encourage
这种题目怎么来考虑
答案
A
encourage和doctor是被动关系,是被鼓励,所以用ed形式
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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