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1、1 北师大版七年级第二学期数学期中试题一、慧 眼 识 金：（每 小 题2分，共15小 题，30分）1 在代数式22221,5,3,1,35xxxxxx中是整式的有（）个A、3 B、4 C、5 D 6 2、下列说法 错误 的是()、内错角相等，两直线平行、两直线平行，同旁内角互补、同角的补角相等、相等的角是对顶角3、下列计算 正确 的是（）A、623aaa B、aaa23 C、32)()(aaa D、326aaa4、如图，已知：1=2，那么下列结论正确的是_ AC=D BAD BC CAB CD D3=4 5、下列各题中的数据，哪个是精确值？_ A 客车在公路上的速度是60km/h B我们学校大
2、约有1000 名学生 C 小明家离学校距离是3km D从学校到火车站共有10 个红灯路口6、如图,1与2是对顶角的是 ()A.B.C.D.7、下列各式中不能用平方差公式计算的是（）A、)(yxyx B、)(yxyx C、)(yxyx D、)(yxyx8、下列说法 正确 的是（）精品资料-欢迎下载-欢迎下载 名师归纳-第 1 页，共 21 页 -2 A、相等的角是对顶角 B、两条直线相交所成的角是对顶角C、对顶角相等 D、有公共顶点且又相等的角是对顶角9、如果一个角的补角是150，那么这个角的余角的度数是（）A、30 B、60C、90D、120 10、下列说法 正确 的是.（）A、31012.3
3、精确到百分位。B、312000精确到千位。C、3.12 万精确到百位。D、0.010230 有四个有效数字。11、一只口袋里共有 3 只红球，2 只黑球，1 只黄球，现在小明任意摸出一个球，则摸出一只黑球的概率是（）A、41 B、61 C、21 D、3112、一只小狗在如图的方砖上走来走去，最终停在阴影方砖上的概率是（）A、154 B、31C、51 D、15213、当老师讲到“肥皂泡的厚度为0.00000007m时，小明立刻举手说老师，我可以用科学记数法表示它的厚度。”同学们，你们不妨也试一试，请选择（）A、0.710 7m B、0.710 8m C、710 8m D、7107m 14、下列事
4、件，你认为是必然事件的是（）A、2004 年 2 月有 30 天 B、如果今天是星期三，明天一定是星期四C、明天会下雨 D、小彬明天的考试将得满分15、23,24mn，则322mn等于（）A、1 B、98 C、278 D、2716二、无空不入（每题 2 分，共计 20 分）02005 ,2)21(._99_,9810223、吸管吸易拉罐内的饮料时，如图，1=110，则 2=12精品资料-欢迎下载-欢迎下载 名师归纳-第 2 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9
5、T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6
6、P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码
7、:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8
8、H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M
9、5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y
10、9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6
11、Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P33（易拉罐的上下底面互相平行）4、有一单项式的系数是2，次数为 3，且只含有yx,则这个单项式可能是5、如果直线a/b,且直线ac,则直线c与 b 的位置关系 (填“平行”或“垂直”).6、若 x2+mx+4是关于 x 的完全平方式，则m=_ 7、用科学记数法表示:0.0000035=.8、近似数 0.305 精确到位
12、,有个有效数字.9、单项选择题是数学试题的重要组成部分，当你遇到不懂做的情况时，如果你随便选一个答案（假设每个题目有4 个备选答案），那么你答对的可能性为 .10、甲看乙在北偏东46 度，那么乙看甲的方向为三、巧算妙解（共 50 分）1、用心算一算（1,2,3,4，每题 4 分，5 题 6 分，共 22分）（1）aaaa723225（2）)45()754(22xxyyxxxyyx（3）xyyxyyx3)221(22（4）)2()1264(3223xyxyyxyx（5）化简求值)()2(2yxyxyx，其中21,2 yx2、动手做一做（5 分）2如图，已知：1=120，C=60。说明 AB CD
13、的理由。3、开心画一画（在原图作图，保留作图痕迹）（8 分）在下列图形中，补充作图：A B C D 精品资料-欢迎下载-欢迎下载 名师归纳-第 3 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:C
14、O9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H1
15、0L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5
16、HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E
17、10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3
18、 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8
19、B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3
20、4（1）在 AD的右侧作 DCP DAB；（2）在射线 CP上取一点 E，使 CE AB，连接 BE。（3）以点 A、B、C、E为顶点的图形是一个怎样的图形？。四、完成下面推理过程（4 分）如图：2=3 _()又EF GH _=_ ()1=3 五、（1）下面是我国几个城市今年三月份的平均降水量。（本题 6 分）地区昆明广 州海口上海降水量（毫升）11 3322 44 你能制作形象的统计图表示这几个地区三月份的平均降水量吗？（2）甲、乙两人打赌，甲说，往图中的区域掷石子，它一定会落在阴影部分上，乙说决不会落在阴影部分上，你认为谁获胜的概率较大？通过计算说明.六、附加题（20 分）1、乘法公式的探
21、究及应用.（1）如左图，可以求出阴影部分的面积是（写成两数平方差的形式）；（2）如 右 图，若 将 阴影 部 分 裁 剪 下 来，重 新拼 成 一 个 矩 形，它 的 宽是，长是，面积是（写成多项式乘法的形式）a a b b 精品资料-欢迎下载-欢迎下载 名师归纳-第 4 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X
22、6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ
23、9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A
24、6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编
25、码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M
26、8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7
27、M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5
28、Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P35（3）比较左、右两图的阴影部分面积，可以得到乘法公式（用式子表达）2、如图，已知 AB/CD，猜想图 1、图 2、图 3 中B,BED,D之间有什么关系？请用等式表示出它们的关系，并证明。1.2.3.证明：精品资料-欢迎下载-欢迎下载 名师归纳-第 5 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7
29、M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5
30、Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X
31、6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ
32、9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A
33、6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编
34、码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M
35、8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P36 北师版七年级下数学期中考试模拟题（四）一、选择题（第 18 题为 B 层次题目，每小题3分，共 24 分）1、单项式221ab的系数和次数分别为【】A、-21，2 B、-21，3 C、21，2D、21，32、用科学计数法表示0.0000907，并保留两个有效数字得【】A、4101.9B、5101.9C、5100.9D、51007.93、下列计算正确的是【】A、
36、5322abaB、aaa44C、632aaaD、632aa4、如果两个不相等的角互为补角,那么这两个角【】A、都是锐角B、都是钝角C、一个锐角,一个钝角D、以上答案都不对5、两整式相乘的结果为122aa的是【】A、43 aaB、43 aaC、26 aaD、26 aa6、有一只小狗在如图的方砖上走来走去，最终停在阴影方砖上的概率是【】A、154B、51C、31D、1527、数学课上老师给出了下面的数据，请问哪一个数据是精确的。【】A、2003 年美国发动的伊拉克战争每月耗费约40 亿美元B、地球上煤储量为5万亿吨左右C、人的大脑约有110 10 个细胞D、某次期中考试中小颖的数学成绩是98 分8
37、、某天数学课上老师讲了整式的加减运算，小颖回到家后拿出自己的课堂笔记，认真地复习老师在课堂上所讲的内容，她突然发现一道题目：（2a2+3ab-b2）-（-3a2+ab+5b2）=5a2-6b2，空格的地方被墨水弄脏了，请问空格中的一项是【】A、+2ab B、+3ab C、+4ab D、-ab 精品资料-欢迎下载-欢迎下载 名师归纳-第 6 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T
38、8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P
39、3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:
40、CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H
41、10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5
42、 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9
43、E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q
44、3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P37 二、填空题9、请你写出一个只含有字母m、n 的单项式，使它的系数为2，次数为3。答：。10、已知：如图1，EAD=DCF，要得到 AB/CD，则需要的条件。（填一个你认为正确的条件即可）11、小明、小刚、小亮三人正在做游戏，现在要从他们三人中选出一人去帮王奶奶干活，则小明 未被选中的概率P=_。12、已知：如图 2，直线AB、CD与直线EF相交于E、F，且AB/CD。若1051，则2度。图1EBFD
45、ACMN图 2ABCDEF13、观察：22225251644161533914224131你发现了什么规律？根据你发现的规律，请你用含一个字母的等式将上面各式呈现的规律表示出来。14、已知9)(2xaxax,那么 a=。15、在生活中人们常用“细如发丝”来形容物体非常非常微小，自从扫描隧道显微镜发明以后，世界上便诞生了一门新学科，这就是“纳米技术”。纳米是一种长度单位，1 纳米是 1 米的亿分之一，即1 纳米=10-9米。VCD 光碟是一个圆形薄片，它的两面有用激光刻成的小凹坑，坑的宽度只有0.4 微米。则 0.4 微米=纳米。16、若054222baba，则ba的值为 _。精品资料-欢迎下载
46、-欢迎下载 名师归纳-第 7 页，共 21 页 -文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9
47、E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q
48、3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T
49、8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P
50、3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码:CO9M8H10L7M5 HV5Y9E10X6Q3 ZQ9T8B4A6P3文档编码: