The girl __ on the ground __ to me that she had __ the book on the shelf.
题目
The girl __ on the ground __ to me that she had __ the book on the shelf.
A.lying,lay,laid B.lay,laid,lain C.lie,lied,lay D.lying,lied,laid
答案
D..
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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