河南省商丘市永城市龙岗镇2018届中考数学复习题一次函数1(无答案).doc

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1单元检测 1-一次函数一、选择题1.下列函数中,自变量 的取值范围是 的是( )A.B.C.D.2.下面哪个点在函数 的图象上( )A.B.C.D.3.一次函数 的图象经过的象限是( )A.一、二、三B.二、三、四C.一、二、四D.一、三、四4.若一次函数 的图象经过第二、三、四象限,则 的取值范围是( )A.B.C.D.25.已知一次函数的图象与直线 平行,且过点 ,那么此一次函数的解析式为( )A.B.C.D.6.汽车开始行驶时,油箱内有油 40 升,如果每小时耗油 5 升,则油箱内余油量 (升)与行驶时间 (时)的函数关系用图象表示应为下图中的( )7.李老师骑自行车上班,最初以某一速度匀速行进,中途由于自行车发生故障,停下修车耽误了几分钟,为了按时到校,李老师加快了速度,仍保持匀速行进,如果准时到校在课堂上,李老师请学生画出他行进的路程 (千米)与行进时间 (小时)的函数图象的示意图,同学们画出的图象如图所示,你认为正确的是( )8.一次函数 的图象经过点 和 ,那么这个一次函数的解析式为( )A.B.3C.D.

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