辽宁省阜新市2021年中考数学试题(原卷版)
辽宁省阜新市2021年中考数学试题一、选择题(在每一个小题给出的四个选项中,只有一个是正确的,每小题3分,共30分)1.计算:,其结果等于()A.2B.C.4D.2.一个几何体如图所示,它的左视图是()A.B.C.D.3.在庆祝中国共产党成立100周年的“红色记忆”校园歌咏比赛中,15个参赛班级按照成绩(成绩各不相同)取前7名进入决赛,小红知道了自己班级的比赛成绩,如果要判断自己的班级能否进入决赛,还需要知道这15个参赛班级成绩的()A.平均数B.中位数C.众数D.方差4.不等式组的解集,在数轴上表示正确的是()A.B.C.D.5.已知点,都在反比例函数的图象上,且,则,的关系是()A.B.C...
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