(完整word版)广东省珠海市香洲区2017-2018学年九年级(上)期末数学试卷(解析版).pdf

2017-2018 学年广东省珠海市香洲区九年级（上）期末数学试卷一、选择题（本大题 10 小题，每小题 3 分，共 30 分）每小题给出四个选项中只有一个是正确的请把答题卡上对应题目所选的选项涂黑1下列图形既是轴对称图形，又是中心对称图形的是（）ABCD2下列说法正确的是（）A投掷一枚质地均匀的硬币10 次，反面朝上的次数一定是5 次B“5 名同学中恰有 2 名同学生日是同一天”是随机事件C“明天降雨的概率为”，表示明天有半天时间都在降雨D“路过十字路口时刚好是红灯”是确定事件3一元二次方程 x26x+9=0的根的情况是（）A有两个不等的实数根B有两个相等的实数根C没有实数根D不能确定4如图，点 A，B，C在O上，A=50，则 BOC的度数为（）A40B50C80D1005已知点 A（2，3）在双曲线 y=上，则下列哪个点也在此双曲线上（）A（2，3）B（1，6）C（1，6）D（2，3）6用配方法解一元二次方程x26x+1=0，则配方后所得的方程为（）A（x+3）2=10B（x+3）2=8C（x3）2=10D（x3）2=87二次函数 y=（x4）2+5 的顶点坐标是（）A（4，5）B（，5）C（4，5）D（4，5）8已知圆的直径是13cm，如果圆心到某直线的距离是6.5cm，则此直线与这个圆的位置关系是（）A相交B相切C相离D无法确定9边长为 4cm 的正方形纸上有一半径为1cm的圆形阴影，随机往纸上扎针，则针落在阴影部分的概率是（）ABCD10已知点（x1，y1）（x2，y2）在抛物线 y=（xh）2+k 上，如果 x1x2h，则 y1，y2，k 的大小关系是（）Ay1y2kBy2y1kCky1y2Dky2y1二、填空題（本大题6 小题，每小题4 分，共 24 分）请将下列各题的正确答案填写在答题卡相应的位置上11若关于 x 的一元二次方程 x23x+m=0的一个根为 1，则 m 的值为12一个不透明的布袋中装有8 个完全相同的小球，其中红球 x 个，若随机摸出一个球，刚好是红球的概率为，则 x=13 圆锥形冰淇淋的母线长是12cm，侧面积是 60cm2，则底面圆的半径长等于14 如图，点 A 在双曲线 y=上，ABx 轴于 B，且AOB的面积 SAOB=1，则 k=15如图已知二次函数y1=x2+c 与一次函数 y2=x+c 的图象如图所示，则当y1y2时 x的取值范围文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G10文档编码:CN1J3U4C10F9 HK4Y9R7D5N7 ZI6E2N4I9G1016如图，在扇形OAB中，AOB=90 ，OA=1，将扇形 OAB绕点 B 逆时针旋转，得到扇形 BDC，若点 O 刚好落在弧 AB上的点 D 处，则线段 AC的长等于三、解答题（一）（本大题 3 小题，每小题 6 分，共 18 分）17解方程：x24x1=018如图，在 O 中，直径 ABCD，E为垂足，AE=2，弦 CD=8，求 O 的半径19如图，在边长均为1 的正方形网格纸上有一个ABC，顶点 A，B，C及点 O均在格点上，请按要求完成以下操作或运算：（1）将 ABC绕点 O顺时针旋转 90，得到 A1B1C1（不写作法，但要标出字母）；（2）求点 A 绕着点 O旋转到点 A 所经过的路径长文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2四、解答题（二）（本大题 3 小题，每小题 7 分，共 21 分）20三张形状、大小、质地相同并标有数字0，1，2 的卡片，将卡片洗匀后，背面朝上放在桌上，若第一次任意抽取一张（不放回），第二次再抽取一张，用列表法或树状图求两次所抽取卡片上的数字恰好是方程x22x=0的两根的概率21某市要组织一次篮球联赛，赛制为单循环形式（每两队之间都赛一场），计划安排15 场比赛（1）应该邀请多少支球队参加比赛？（2）若某支球队参加2 场后，因故不参与以后比赛，问实际共比赛多少场？22如图，正方形 ABC的项点 A 在抛物线 y=x2上，顶点 B，C在 x 轴的正半轴上，且点B的坐标为（1，0）（1）求点 D 坐标；（2）将抛物线 y=x2适当平移，使得平移后的抛物线同时经过点B 与点 D，求平移后抛物线解析式，并说明你是如何平移的五、解答题（三）（本大题 3 小题，每小题 9 分，共 27 分）23如图，直线 y=x+b 与 x 轴，y 轴分别交于 A，B 两点，与双曲线 y=（x0）交于点C，过 C作 CD y 轴于点 D，已知 A 的坐标为（1，0），DO=2BO（1）直接写出 b 的值，b=；（2）求双曲线的解析式；（3）若双曲线上有一点E，直线 AB上有一点 F，满足以 CD，EF为对边的四边形是平行四边形，求点 E的横坐标文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I224如图，O 与 AB，AC分别相切于 D，E两点，AB=AC，AO交O于点 F，交 BC于点 G，BC与O交于点 P，Q 连接 EQ（1）求证：AGBC；（2）若 DE平分 OF，求证：ADE是等边三角形；（3）在（2）的条件下，若 AD=PQ，EQ=2，求 BP的长25如图 1，在 RtABC中，ACB=90 ，AC=6，BC=8，直角 POQ的顶点 O刚好为 AB的中点，且 OP交 BC边于点 DOQ经过点 C（1）填空：OC=，点 O到 BC的距离=；（2）如图 2，若将 POQ绕点 O逆时针旋转，在 POQ旋转过程中，OQ交线段 AC于点 E，OP交线段 BC于点 F当 EF=OC 时，求 CE的长；设 CE的长为 x（0 x3），CEF的面积为 S，试求 S与 x 的函数关系式，并求面积S是否有最大值或者最小值？若有，请求出其值；若无请说明理由文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I22017-2018 学年广东省珠海市香洲区九年级（上）期末数学试卷参考答案与试题解析一、选择题（本大题 10 小题，每小题 3 分，共 30 分）每小题给出四个选项中只有一个是正确的请把答题卡上对应题目所选的选项涂黑1下列图形既是轴对称图形，又是中心对称图形的是（）ABCD【分析】根据轴对称图形与中心对称图形的概念解答【解答】解：A、是轴对称图形，不是中心对称图形；B、是轴对称图形，不是中心对称图形；C、是轴对称图形，也是中心对称图形；D、是轴对称图形，不是中心对称图形故选：C【点评】本题考查的是中心对称图形与轴对称图形的概念轴对称图形的关键是寻找对称轴，图形两部分折叠后可重合，中心对称图形是要寻找对称中心，旋转180 度后两部分重合2下列说法正确的是（）A投掷一枚质地均匀的硬币10 次，反面朝上的次数一定是5 次B“5 名同学中恰有 2 名同学生日是同一天”是随机事件C“明天降雨的概率为”，表示明天有半天时间都在降雨D“路过十字路口时刚好是红灯”是确定事件文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2文档编码:CZ2W5B4M8C7 HR9Q7X1R8Q10 ZI5V6Z4I5I2【分析】直接利用概率的意义以及随机事件的定义分别分析得出答案【解答】解：A、投掷一枚质地均匀的硬币10 次，反面朝上的次数不一定是5 次，故此选项错误；B、5名同学中恰有2名同学生日是同一天”是随机事件，正确；C、“明天降雨的概率为”，表示明天降雨的可能性是50%，故此选项错误；D、路过十字路口时刚好是红灯”是随机事件，故此选项错误故选：B【点评】此题主要考查了概率的意义以及随机事件的定义，正确把握相关定义是解题关键3一元二次方程 x26x+9=0的根的情况是（）A有两个不等的实数根B有两个相等的实数根C没有实数根D不能确定【分析】先计算判别式的值，然后根据判别式的意义判断方程根的情况【解答】解：=（6）2419=0，方程有两个相等的实数根故选：B【点评】本题考查了一元二次方程ax2+bx+c=0（a0）的根的判别式=b24ac：当0，方程有两个不相等的实数根；当=0，方程有两个相等的实数根；当0，方程没有实数根4如图，点 A，B，C在O上，A=50，则 BOC的度数为（）A40B50