2012年贵州省黔东南州中考数学试卷(含解析版)
2012年贵州省黔东南州中考数学试卷一、选择题1.(1分)计算﹣1﹣2等于( )A.1B.3C.﹣1D.﹣32.(1分)七(1)班的6位同学在一节体育课上进行引体向上训练时,统计数据分别为7,12,10,6,9,6则这组数据的中位数是( )A.6B.7C.8D.93.(1分)下列等式一定成立的是( )A.B.C.D.=94.(1分)如图,若AB是⊙O的直径,CD是⊙O的弦,∠ABD=55°,则∠BCD的度数为( )A.35°B.45°C.55°D.75°5.(1分)抛物线y=x2﹣4x+3的图象向右平移2个单位长度后所得新的抛物线的顶点坐标为( )A.(4,﹣1)B.(0,﹣3)C....
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