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The 29th Olympic Games was h______ (举办) in Beijing on August 8th, 2008.
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In those hard days, we could not leave behind________came to us for help.
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如图,∠A+∠B+∠C+∠D+∠E 等于( ) A. 90 ° B. 180° C.360° D.270°
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4位老师带着58位同学去划船,每条船最多只能坐5人,他们至少要租多少条船?
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若a,b,c是△ABC的三边,则化简|a-b-c|+|b-c-a|+|c-a-b|的结果是( )
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