Tom was not old but he did not have much hair His wife grace had thick beautiful 翻译
题目
Tom was not old but he did not have much hair His wife grace had thick beautiful 翻译
答案
汤姆年纪不大却头发稀疏,他妻子格瑞斯有厚密的秀发.
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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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