每个节日描述一件好玩的事,10个节日(英语描述)怎么写啊
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每个节日描述一件好玩的事,10个节日(英语描述)怎么写啊
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Mother's day 母亲节Mother's day is a special day for everyone!On that day,children usually give their mother with cards,presents and flowers.But most of the people,like giving their moth...
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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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