初中数学下册期末考试题及答案

下册期末考试题及答案以下以初中数学下册期末考试为例生成一套试卷及答案：一、选择题（每题3分，共30分）1.下列各点中，在第二象限的点是（）A.(2,3)B.(2,-3)C.(-2,3)D.(-2,-3)2.不等式2x1<3的解集是（）A.x>1B.x<1C.x>2D.x<23.若一个多边形的内角和是外角和的3倍，则这个多边形是（）A.八边形B.九边形C.十边形D.十二边形4.已知点P(a+1,2a3)关于x轴的对称点在第一象限，则a的取值范围是（）A.a<-1B.-1<a<3/2C.-3/2<a<1D.a>3/25.下列调查中，适合采用全面调查（普查）方式的是（）A.对某班50名同学视力情况的调查B.对元宵节期间市场上汤圆质量情况的调查C.对某类烟花爆竹燃放质量情况的调查D.对重庆嘉陵江水质情况的调查6.已知方程组$\begin{cases}2x+y=3\\x2y=5\end{cases}$，则2x+6y的值是（）A.-2B.2C.-4D.47.若点M(3,a2)，N(b,a)关于原点对称，则a+b的值是（）A.-2B.-1C.1D.28.一次函数y=kx+b（k≠0）的图象经过点A(-1,-2)和点B(1,2)，则不等式kx+b>2的解集是（）A.x<-1B.x>-1C.x<1D.x>19.为了了解某校1500名学生的体重情况，从中抽取了100名学生的体重，就这个问题来说，下面说法正确的是（）A.1500名学生是总体B.1500名学生的体重是总体C.每个学生是个体D.100名学生是所抽取的一个样本10.如图，在平面直角坐标系中，已知点A(1,1)，B(-1,1)，C(-1,-2)，D(1,-2)，把一根长为2023个单位长度且没有弹性的细线（线的粗细忽略不计）的一端固定在点A处，并按ABCDA…的规律紧绕在四边形ABCD的边上，则细线另一端所在位置的点的坐标是（）A.(1,-1)B.(-1,1)C.(-1,-2)D.(1,-2)二、填空题（每题3分，共18分）11.点P(-3,4)到x轴的距离是______。12.不等式组$\begin{cases}x1>0\\2x<6\end{cases}$的解集是______。13.一个样本数据为19,23,26,29,28,23,29,23,29,29,23,26,29,23,26,29,23,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23,26,29,23