英语家庭介绍作文
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英语家庭介绍作文
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Passage 1:I have a small family of three people.They are,of course,my parents and I. Both my parents are middle school teachers.My father is a Chinese teacher and my mother is a teacher of English. Th...
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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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