2012年贵州省毕节市中考数学试卷(含解析版)
2012年贵州省毕节地区中考数学试卷一、选一选(本大题共15小题,每小题3分,共45分.在每小题的四个选项中,只有一个选项正确,请把你认为正确的选项填涂在相应的答题卡上)1.(3分)下列四个数中,无理数是( )A.B.C.0D.π2.(3分)实数a、b在数轴上的位置如图所示,下列式子错误的是( )A.a<bB.|a|>|b|C.﹣a<﹣bD.b﹣a>03.(3分)下列图形是中心对称图形的是( )A.B.C.D.4.(3分)下列计算正确的是( )A.3a﹣2a=1B.a4•a6=a24C.a2÷a=aD.(a+b)2=a2+b25.(3分)如图,△ABC的三个顶点分别在直线a、b上,且a...
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