he put his hand into his pocket,and took out a phrasebook这一句he后面怎么没有was?
题目
he put his hand into his pocket,and took out a phrasebook这一句he后面怎么没有was?
答案
he主语 put 谓语 hand 宾语
took 谓语 phrasebook宾语
一个句子主谓宾都完整不需was
不是被动也不需要was
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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．
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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