新概念2册 47课练习E答案
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新概念2册 47课练习E答案
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1 i asked G..what these people were looking at?2 G..answered that he didnt know.He thought a new road was being built and it would be finished soon.3 because they were looking into an empty hole.4 he ...
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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