阅读理解A goodmemory is a great help in learning a language
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阅读理解A goodmemory is a great help in learning a language
找这篇阅读理解，这是那篇阅读理解的第一句话
答案
好的记忆力对学习一门语言来说有很大的帮助A good memory is a great help in learning a language.Everybody learns his own language by remembering what he hears when he is a small child,and some children -...
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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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