把下列句子变为被动语态.1,she has told me about the story.2.
题目
把下列句子变为被动语态.1,she has told me about the story.2.
We have completed all the preparations for the tast,abd we are ready
to start.
答案
1.I have been told the story by her./The story has been told by her to me.2.All the preparations for the task have been completed by us,and we are ready to start.
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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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