1.He was tired and in class.
题目
1.He was tired and in class.
A.get to asleep B.got to sleep C.went to sleep D.wake up
2.In China,people like giving expensive gifts to .
A.someone slse B.slse someone C.other someine D.someone other
答案
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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