There has obviously been a hook on the wall in the lounge room which has been taken off and paint ha
题目
There has obviously been a hook on the wall in the lounge room which has been taken off and paint has come away which has been patched
答案
很明显,再起居室的墙上一直有个钩子,他现在已经被取下了,而且已经补上的漆已经脱落剥离了.
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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