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初二上学期数学期中试卷及试卷分析

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初二上学期数学期中试卷及试卷分析 一. 选择题（每题3分，共30分） 1. 下列多项式中，是多项式 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952217.gif" \* MERGEFORMATINET 的因式的是（ ） A.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952497.gif" \* MERGEFORMATINET  B.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952722.gif" \* MERGEFORMATINET  C.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952946.gif" \* MERGEFORMATINET  D.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952102.gif" \* MERGEFORMATINET  2. 下列多项式中不能再继续分解的是（ ） A.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952326.gif" \* MERGEFORMATINET  B.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952551.gif" \* MERGEFORMATINET  C.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952943.gif" \* MERGEFORMATINET  D.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952268.gif" \* MERGEFORMATINET  3. 下列语句正确的是（ ） A. 在所有连接的两点线中，直线最短 B. 线段AB是点A与点B的距离 C. 三条直线两两相交必有三个交点 D. 两点确定一条直线 4. 下列两个圆形中只有位置关系而无大小关系的图形是（ ） A. 点与点 B. 线段与线段 C. 角与角 D. 钝角与锐角 5. 下列说法正确的个数是（ ） ① 比锐角大的角叫钝角 ② 一条直线就是一个平角 ③ 一个角的补角必定比这个角大 ④ 一个锐角的余角比这个角小 A. 0个 B. 1个 C. 2个 D. 3个 6. 一个角的补角是它余角的3倍，这个角的余角的补角是（ ） A. 30° B. 45° C. 135° D. 60° 7. 如果线段AB=13，MA+MB=17，那么下面说法正确的是（ ） A. M点在线段AB上 B. M点在直线AB上 C. M点在直线AB外 D. M点在直线AB上，也可能在直线AB外 8. 已知： INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092952324.gif" \* MERGEFORMATINET ，画 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953569.gif" \* MERGEFORMATINET ，如果OC是 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953962.gif" \* MERGEFORMATINET 的平分线，那么 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953286.gif" \* MERGEFORMATINET =（ ） INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953510.gif" \* MERGEFORMATINET  A.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953567.gif" \* MERGEFORMATINET  B.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953959.gif" \* MERGEFORMATINET  C.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953115.gif" \* MERGEFORMATINET  D.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953340.gif" \* MERGEFORMATINET  9. 如图，AOE是一直线， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953732.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953393.gif" \* MERGEFORMATINET ，则图中相等的角，互余的角，互补的角分别为（ ）对 A. 4，5，7 B. 4，4，8 C. 5，6，8 D. 5，4，7  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953617.gif" \* MERGEFORMATINET  10. 如图，一条直线上，顺次有四个点，A、B、C、D则下列成立的是（ ） A.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953842.gif" \* MERGEFORMATINET  B.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953166.gif" \* MERGEFORMATINET  C.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092953390.gif" \* MERGEFORMATINET  D.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954636.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954860.gif" \* MERGEFORMATINET    二. 填空题（每题3分，共24分） 11. 计算 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954967.gif" \* MERGEFORMATINET  12.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954572.gif" \* MERGEFORMATINET  分 秒， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954796.gif" \* MERGEFORMATINET  度 13. 计算十一点五十分时，时针与分针夹角是 度 14.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954177.gif" \* MERGEFORMATINET 可分解为 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092954401.gif" \* MERGEFORMATINET 则 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955590.gif" \* MERGEFORMATINET  15. 已知： INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955815.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955139.gif" \* MERGEFORMATINET 则 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955532.gif" \* MERGEFORMATINET  16. 分解 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955192.gif" \* MERGEFORMATINET 因式为 17. 若 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955417.gif" \* MERGEFORMATINET 且 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955641.gif" \* MERGEFORMATINET ，则 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955590.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955526.gif" \* MERGEFORMATINET  18. 整数a , b满足 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955863.gif" \* MERGEFORMATINET ，则 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955187.gif" \* MERGEFORMATINET    三. 解答题（19—25题每题8分，26题10分） 19. 分解 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955243.gif" \* MERGEFORMATINET 因式 20. 分解 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955468.gif" \* MERGEFORMATINET  21. 分解 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956881.gif" \* MERGEFORMATINET 因式 22. 利用因式分解解方程 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956206.gif" \* MERGEFORMATINET  23. 已知： INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956430.gif" \* MERGEFORMATINET 当 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956486.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956259.gif" \* MERGEFORMATINET 为何值时， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956483.gif" \* MERGEFORMATINET 值最小，并求出最小值。 24. 将线段AB延长到C，使 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956708.gif" \* MERGEFORMATINET ，AB中点是D点，E、F是BC上的点，且 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956932.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956256.gif" \* MERGEFORMATINET ，如果 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956649.gif" \* MERGEFORMATINET ，求DE和DF的长。 25. 点O在直线AB上，过点O在直线AB上方画射线OM、ON，如果 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956986.gif" \* MERGEFORMATINET 比 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092957892.gif" \* MERGEFORMATINET 大20°，且 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092957382.gif" \* MERGEFORMATINET 。求出 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092957491.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092956986.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092957892.gif" \* MERGEFORMATINET 的度数，并画出图形。（用直尺半圆仪） 26. 已知： INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958734.gif" \* MERGEFORMATINET ， INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958171.gif" \* MERGEFORMATINET ，求 INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958563.gif" \* MERGEFORMATINET 的值。       【试题答案】 一. 1. C 2. D 3. D 4. A 5. A 6. C 7. D 8. C 9. D 10. A   二. 11.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958956.gif" \* MERGEFORMATINET  12. 4；48； INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958561.gif" \* MERGEFORMATINET  13. 5 14.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958841.gif" \* MERGEFORMATINET  15.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958334.gif" \* MERGEFORMATINET  16.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958558.gif" \* MERGEFORMATINET  17. 3； INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958614.gif" \* MERGEFORMATINET  18. 15 提示： INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092955863.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092958838.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959689.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959913.gif" \* MERGEFORMATINET  ∵  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959969.gif" \* MERGEFORMATINET 为整数  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959462.gif" \* MERGEFORMATINET  ∴  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959686.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959910.gif" \* MERGEFORMATINET  三. 19.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959235.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959403.gif" \* MERGEFORMATINET  20.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959795.gif" \* MERGEFORMATINET  21.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959120.gif" \* MERGEFORMATINET  22.  INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959344.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092959681.gif" \* MERGEFORMATINET   INCLUDEPICTURE "http://www.k8edu.com/adminhsfei/webedit/uploadfile/LOCAL/2010-01-04/20100104092
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