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In the world, soccer or football is the most popular sport.英译汉

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In the United States a lot of college students do not live at home.英译汉

He doesn’t know what life means to him.英译汉

How long will it take us to get there?英译汉

各类矿物的浮选粒度上限不同,非硫化矿物一般为()。

A. 0.25~0.3mm
B. 0.2~0.25mm
C. 0.25以下
D. 0.3mm以上

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