This is a big nature().Yes,they are().Are there any ()?Yes,they are ()the bamboo.
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This is a big nature().Yes,they are().Are there any ()?Yes,they are ()the bamboo.
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This is a big nature ( forest).There are many (animal )in it.The two ( dogs )are running .The tigers( are )sleeping .what about the baby (tiger oh,she is ( drinking) ( water )near the river.can you se...
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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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