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(2006•沈阳)下列事件:(1)阴天会下雨;(2)随机掷一枚均匀的硬币,正面朝...
(2006•沈阳)下列事件:(1)阴天会下雨;(2)随机掷一枚均匀的硬币,正面朝上;(3)12名同学中,有两人的出生月份相同;(4)2008年奥运会在北京举行.其中不确定事件有( )
A.1个
B.2个
C.3个
D.4个
考点分析:
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的解集表示在数轴上,正确的是( )
A.
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B.
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C.
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D.
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(2006•沈阳)下列计算中,正确的是( )
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