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One afternoon I toured an art museum while waiting for my husband to finish a business meeting.
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△ABC中,若∠A、∠B、∠C所对的边a,b,c均成等差数列,∠B= π /3 ,△ABC的面积为4 根号3 ,那么b=______.
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They told _____ about their families.
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Jim likes playing football.And he also likes watching football matches .
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CH3 CH2 CH CH2 CHO中间C连了一个CH3怎么命名?
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