急!体育用品收藏收藏的英语作文!初一的.七十词左右.
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急!体育用品收藏收藏的英语作文!初一的.七十词左右.
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My hobby is playing basketball.I started to play basketball when I was 12 years old.After school,I would stay on the playground and play basketball with some friends of mine until it was dark .Since t...
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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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