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1、2018-2019 学年八年级第二学期期中数学试卷 一、选择题 1若ab，则下列不等式变形错误的是()A11ab B22ab C3434ab D4343ab 2下列电视台的台标，是中心对称图形的是()A B C D 3把不等式组12 3xx 的解集表示在数轴上，下列选项正确的是()A B C D 4在ABC中，:1:2:3ABC，最小边4BCcm，则最长边AB的长为()A8cm B6cm C5cm D5cm 5如图，在ABC中，60BAC，将ABC绕着点A顺时针旋转40后得到ADE，则(BAE )A80 B90 C100 D110 6如图，在ABC中，AD平分BAC，DEAB于E，15ABCS
2、，3DE，6AB，则AC长是()A7 B6 C5 D4 7如图，将四边形ABCD先向左平移 3 个单位，再向上平移 2 个单位，那么点A的对应点A的坐标是()A(6,1)B(0,1)C(0,3)D(6,3)8一次智力测验，有 20 道选择题评分标准是：对 1 题给 5 分，错 1 题扣 2 分，不答题不给分也不扣分小明有两道题未答至少答对几道题，总分才不会低于 60 分则小明至少答对的题数是()A11 道 B12 道 C13 道 D14 道 9如图，一次函数ykxb的图象与y轴交于点(0,1)，则关于x的不等式1kxb 的解集是()A0 x B0 x C1x D1x 10 若关于x、y的二元一
3、次方程组3133xyaxy 的解满足2xy，则a的取值范围是()A2a B2a C4a D4a 11如图，正方形OABC的两边OA、OC分别在x轴、y轴上，点(5,3)D在边AB上，以C为中心，把CDB旋转90，则旋转后点D的对应点D的坐标是()文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y
4、4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L
5、10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9
6、Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U
7、3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN
8、4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O
9、9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7文档编
10、码:CW6Y4Y2P4L10 HE9Y4O10U3O4 ZN4I5H2O9V7 A(2,10)B(2,0)C(2,10)或(2,0)D(10,2)或(2,0)12如图，在平面直角坐标系中，点A，B的坐标分别为(0,4)和(1,3)OAB沿x轴向右平移后得到O AB，点A的对应点A在直线45yx上，则点B与O间的距离为()A3 B4 C5 D34 二、填空题（本题有 4 小题）13不等式3(1)5xx的非负整数是 14 如图，等腰ABC中，ABAC，65C ，AB的垂直平分线MN交AC于点D，则DBC的度数是 15如图，在ABC中，4AB，6BC，60B ，将ABC沿射线BC的方向平移 2个单位
11、后，得到AB C，连接AC，则AB C的周长为 文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5
12、M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 Z
13、L4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W
14、9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3
15、文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:C
16、F6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2
17、W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q316如图，在ABC中，90C，2ACBC，将ABC绕点A顺时针方向旋转60到ABC的位置，连接C B，则C B 三、解答
18、题（本题有 7 小题）17解不等式（组)，并把解集在数轴上表示出来（1）45 2(1)xx （2）43(2)121(4)2xxxx 18 如图，Rt ABC，90B ，AD平分BAC，交BC于点D，DFAC于F 线段AB上一点E，且DEDC证明：BECF 19某市为鼓励居民节约用水，对每户用水按如下标准收费：若每户每月用水不超过38m，则每3m按 1 元收费；若每户每月用水超过38m，则超过部分每3m按 2 元收费某用户 7月份用水比38m要多3xm，交纳水费y元（1）求y关于x的函数解析式，并写出x的取值范围（2）此用户要想每月水费控制在 20 元以内，那么每月的用水量最多不超过多少3m？2
19、0如图，已知：AD平分CAE，/ADBC（1）求证：ABC是等腰三角形（2）当CAE等于多少度时ABC是等边三角形？证明你的结论 文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M
20、3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL
21、4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9
22、J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文
23、档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF
24、6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W
25、1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3 21某公司保安部去商店购买同一品牌的
26、应急灯和手电筒，查看定价后发现，购买一个应急灯和 5 个手电筒共需 50 元，购买 3 个应急灯和 2 个手电筒共需 85 元（1）求出该品牌应急灯、手电筒的定价分别是多少元？（2）经商谈，商店给予该公司购买一个该品牌应急灯赠送一个该品牌手电筒的优惠，如果该公司需要手电筒的个数是应急灯个数的 2 倍还多 8 个，且该公司购买应急灯和手电筒的总费用不超过 670 元，那么该公司最多可购买多少个该品牌应急灯？22已知：如图，在Rt ABC中，90C ，沿过点B的一条直线BE折叠这个三角形，使点C与AB边上的一点D重合（1）当30A 时，求证：点D为AB的中点；（2）在（1）的条件下，若1DE，求A
27、BC的面积 23如图，在直角三角形ABC中，90B ，12ABcm，16BCcm，点P从A开始沿AB边向点B以2/cm s的速度移动，点Q从点B开始沿BC边向点C以4/cm s的速度移动P，Q分别从A，B同时出发，当一个动点到达终点则另一动点也随之停止运动 设运动时间为()t s（1）求t为何值时，PBQ为等腰三角形？（2）是否存在某一时刻t，使点Q在线段AC的垂直平分线上？（3）点P、Q在运动的过程中，是否存在某一时刻t，直线PQ把ABC的周长与面积同时分为1:2两部分？若存在，求出t，若不存在，请说明理由 文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3
28、文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:C
29、F6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2
30、W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 H
31、F7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5
32、M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 Z
33、L4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W
34、9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3 文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q
35、3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:
36、CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P
37、2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1
38、HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C
39、5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6
40、ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10
41、W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3 参考答案 一、选择题 1若ab，则下列不等式变形错误的是()A11ab B22ab C3434ab D4343ab 解：A、在不等式ab的两边同时加上 1，不等式仍成立，即11ab 故本选项变形正确；B、在不等式ab的两边同时除以 2，不等式仍成立，即22ab故本选项变形正确；C、在不等式ab的两边同时乘以 3 再减去 4，不等式仍成立，即3434ab 故本选项变形正确；D、在不等式ab的两边同时乘以3再减去 4
42、，不等号方向改变，即4343ab 故本选项变形错误；故选：D 2下列电视台的台标，是中心对称图形的是()A B C D 解：A、不是中心对称图形，故A选项错误；B、不是中心对称图形，故B选项错误；C、不是中心对称图形，故C选项错误；D、是中心对称图形，故D选项正确 故选：D 3把不等式组12 3xx 的解集表示在数轴上，下列选项正确的是()文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编
43、码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L
44、4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P
45、1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W
46、9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W
47、6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K
48、10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J1
49、0Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3A B C D 解：由第一个不等式得：1x；由2 3x 得：1x 不等式组的解集为11x 故选：B 4在ABC中，:1:2:3ABC，最小边4BCcm，则最长边AB的长为()A8cm B6cm C5cm D5cm 解：设A、B、C分别为x、2x、3x，则23180 xxx，解得，30 x ，即30A ，390Cx ，28()ABBCcm，故选：A 5如图，在ABC中，60BAC，将ABC绕着点A顺时针旋转40后得到ADE，
50、则(BAE )A80 B90 C100 D110 解：ABCQ绕着点A顺时针旋转40后得到ADE，40CAE，60BACQ，6040100BAEBACCAE 故选：C 6如图，在ABC中，AD平分BAC，DEAB于E，15ABCS，3DE，6AB，文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6L4P2W1P1 HF7W9C5M3W6 ZL4K10W9J10Q3文档编码:CF6