深圳市宝安区沪教版九年级一模真题卷含答案
广东省深圳市宝安区九年级语文中考一模试卷
广东省深圳市宝安区九年级语文中考一模试卷姓名:________ 班级:________ 成绩:________一、选择题 (共5题；共10分)1. （2分） (2017七上·腾冲期中) 下列词语中，有错别字的一组是（）A . 烘托萌发宽敞秋风萧瑟B . 莅临令尊劳驾浑为一谈C . 尴尬光顾惨淡煞有介事D . 褪色和蔼轻捷截然不同2. （2分）下列各句中没有语病的一句是（）A . 进入21世纪，随着经济全球化进程的加快和知识经济的深入发展，国与国之间的竞争越来越集中到知识和人才方面。
B . 很多人利用长假出游，怎样才能避免合法权益不受侵害，有关部门对此作了相关提示。
C . 科学工作者认为，目前国内具有如此独特的适于华南虎种群自然繁衍的生态环境，已经不多了。
D . 新华路乒乓球馆是经体育局和民政局批准的专门推广乒乓球运动的团体。
3. （2分）下列关于文学名著表述有误的一项是（）A . “舌战群儒”“草船借箭”“七擒孟获”“智取生辰纲”家等情节，刻画了诸葛亮深谋远虑、博学多才的形象，他因此成为读者喜爱的智者化身。
B . “像秋风扫落叶一样地对待敌人，是螳螂永不改变的情感”，正因为法布尔喜欢赋予昆虫人的情感，《昆虫记》才让读者如此痴迷。
C . “你以为，因为我穷、低微、不美、矮小，我就没有灵魂没有心吗？你想错了！——我的灵魂跟你的一样，我的心也跟你的完全一样！”简·爱对罗切斯特说的这段话，体现了她独立倔强的个性和追求平等爱情的精神。
D . 格列佛在“风暴中偏航”又于“麦田里获救”，“孤身救舰队”后又“奇招灭火灾”。
他是一个喜欢冒险、渴望自由、刚毅勇敢的航海家。
4. （2分） (2020九下·天津期末) 阅读《行路难》（其一）回答小题。
行路难·其一金樽清酒斗十千，玉盘珍羞直万钱。
停杯投箸不能食，拔剑四顾心茫然。
欲渡黄河冰塞川，将登太行雪满山。
闲来垂钓碧溪上，忽复乘舟梦日边。
2020-2021深圳宝安区民众学校九年级数学下期末一模试题(附答案)
（1）本次参加抽样调查的居民有多少人？
（2）将两幅不完整பைடு நூலகம்图补充完整；
（3）若居民区有8000人，请估计爱吃D粽的人数；
（4）若有外型完全相同的A、B、C、D粽各一个，煮熟后，小王吃了两个．用列表或画树状图的方法，求他第二个吃到的恰好是C粽的概率．
24．为培养学生良好学习习惯，某学校计划举行一次“整理错题集”的展示活动，对该校部分学生“整理错题集”的情况进行了一次抽样调查，根据收集的数据绘制了下面不完整的统计图表．
2020-2021深圳宝安区民众学校九年级数学下期末一模试题(附答案)
一、选择题
1．若直线 经过点 ，直线 经过点 ，且 与 关于 轴对称，则 与 的交点坐标为（）
A． B． C． D．
2．如图，矩形ABCD中，AB=3，BC=4，动点P从A点出发，按A→B→C的方向在AB和BC上移动，记PA=x，点D到直线PA的距离为y，则y关于x的函数图象大致是（）
（1）判断直线BC与⊙O的位置关系，并说明理由；
（2）若AC=3，∠B=30°．
①求⊙O的半径；
②设⊙O与AB边的另一个交点为E，求线段BD、BE与劣弧DE所围成的阴影部分的图形面积．（结果保留根号和π）
①若由成人8人和少年5人带队，则所需门票的总费用是多少元?
②若剩余经费只有1200元可用于购票，在不超额的前提下，最多可以安排成人和少年共多少人带队?求所有满足条件的方案，并指出哪种方案购票费用最少．
26．如图，在Rt△ABC中，∠C=90°，∠BAC的角平分线AD交BC边于D．以AB上某一点O为圆心作⊙O，使⊙O经过点A和点D．
（1）求m，k，n的值；
（2）求△ABC的面积．
23．“端午节”是我国的传统佳节，民间历来有吃“粽子”的习俗．我市某食品厂为了解市民对去年销量较好的肉馅粽、豆沙馅粽、红枣馅粽、蛋黄馅粽（以下分别用A、B、C、D表示）这四种不同口味粽子的喜爱情况，在节前对某居民区市民进行了抽样调查，并将调查情况绘制成如下两幅统计图（尚不完整）．
2024届广东省深圳市宝安区宝安中学九年级物理第一学期期末教学质量检测模拟试题含解析
2024届广东省深圳市宝安区宝安中学九年级物理第一学期期末教学质量检测模拟试题注意事项1．考试结束后，请将本试卷和答题卡一并交回．2．答题前，请务必将自己的姓名、准考证号用0．5毫米黑色墨水的签字笔填写在试卷及答题卡的规定位置． 3．请认真核对监考员在答题卡上所粘贴的条形码上的姓名、准考证号与本人是否相符．4．作答选择题，必须用2B 铅笔将答题卡上对应选项的方框涂满、涂黑；如需改动，请用橡皮擦干净后，再选涂其他答案．作答非选择题，必须用05毫米黑色墨水的签字笔在答题卡上的指定位置作答，在其他位置作答一律无效． 5．如需作图，须用2B 铅笔绘、写清楚，线条、符号等须加黑、加粗．一、选择题（每题1.5分，共30题，45分） 1．关于温度、内能和热量，下列说法正确的是（ ）A ．物体的内能增大，一定是吸收了热量B ．物体吸收热量，温度就一定升高C ．物体的温度升高，内能就会增大D ．物体的内能增大，温度就会升高2．如图所示电路，闭合开关后，两灯正常发光，比较a b c d 、、、四处电流的大小，其中可能正确的是（ ）A ．a d I I >B ．a b I I <C ．b c I I >D ．c d I I =3．如图所示，金属小球从光滑轨道中的A 点处由静止滑下，经过B 点，到达最低点C 后，再沿轨道向上运动，若不计空气阻力，则下列说法中正确的是A ．小球能沿轨道向上运动到E 点处B ．小球从A 点加速下滑到C 点时，重力没有对小球做功 C ．小球到达C 点时，它的动能最大，重力势能最小D ．小球到达D 点时的机械能大于它到达B 点时的机械能 4．关于欧姆定律，下列说法正确的是（ ） A ．电阻越大，电流越小 B ．电压越大，电流越大C ．电压为零，电阻也为零D ．电阻一定时，电压越大，电流越大5．（2016·新疆卷）关于家庭电路和安全用电，下列说法正确的是（ ） A ．使用电冰箱时，外壳必须接地B．开关可以接在用电器和零线之间C．当用电器着火时，应迅速向用电器泼水D．为了方便可以直接抓住导线拉出插座上的插头6．如图所示，人在科技馆内用手触摸静电球时，头发丝一根根竖起并散开，由该现象可推断竖起的头发丝所带的电荷一定是A．正电荷B．负电荷C．异种电荷D．同种电荷7．下列做法符合安全用电原则的是（）A．家用保险丝熔断后，可用铁丝或铜丝代替B．雷雨天气可以站在大树下避雨C．选用插座时，所有家用电器都使用两孔插座D．搬动电器前应断开电源开关8．如图所示，灯泡L1、L2的电阻分别为20Ω、40Ω，闭合开关S，通过L1、L2的电流分别为I1、I2，它们两端的电压分别为U1、U2，则（）A．I1：I2=2:1，U1：U2=2:1B．I1：I2=2:1，U1：U2=1:1C．I1：I2=1:2，U1：U2=1:1D．I1：I2=1:2，U1：U2=1:29．下列符合安全用电原则的是（）A．家里同时使用几个大功率用电器B．选择保险丝时应尽量选择粗的C．打雷下雨时，站在大树下避雨D．如果有人发生了触电事故，要立即切断电源10．电烙铁通电后热得发烫，而跟电烙铁连接的铜导线却不怎么热。
广东省深圳市宝安区2022年中考一模数学试题含解析
广东省深圳市宝安区2022年中考一模数学试题注意事项:1．答题前，考生先将自己的姓名、准考证号码填写清楚，将条形码准确粘贴在条形码区域内。
2．答题时请按要求用笔。
3．请按照题号顺序在答题卡各题目的答题区域内作答，超出答题区域书写的答案无效；在草稿纸、试卷上答题无效。
4．作图可先使用铅笔画出，确定后必须用黑色字迹的签字笔描黑。
5．保持卡面清洁，不要折暴、不要弄破、弄皱，不准使用涂改液、修正带、刮纸刀。
一、选择题（每小题只有一个正确答案，每小题3分，满分30分）1．如图，下列图形都是由面积为1的正方形按一定的规律组成，其中，第（1）个图形中面积为1的正方形有2个，第（2）个图形中面积为1的正方形有5个，第（3）个图形中面积为1的正方形有9个，…，按此规律．则第（6）个图形中面积为1的正方形的个数为（）A．20 B．27 C．35 D．402．一次函数满足，且随的增大而减小，则此函数的图象不经过（）A．第一象限B．第二象限C．第三象限D．第四象限3．计算（﹣ab2）3的结果是（）A．﹣3ab2B．a3b6C．﹣a3b5D．﹣a3b64．下列调查中适宜采用抽样方式的是（）A．了解某班每个学生家庭用电数量B．调查你所在学校数学教师的年龄状况C．调查神舟飞船各零件的质量D．调查一批显像管的使用寿命5．如图，正方形ABCD的顶点C在正方形AEFG的边AE上，AB＝2，AE＝42，则点G 到BE的距离是（）A 165B．3625C．25D1856．tan60°的值是( )A ．3B ．32C ．33D ．127．已知，C 是线段AB 的黄金分割点，AC ＜BC ，若AB=2，则BC=（ ） A ．3﹣5B ．12（5+1） C ．5﹣1D ．12（5﹣1） 8．下列实数中，在2和3之间的是（ ） A ．πB ．2π-C ．325D ．3289．如图，在矩形ABCD 中AB ＝2，BC ＝1，将矩形ABCD 绕顶点B 旋转得到矩形A'BC'D ，点A 恰好落在矩形ABCD 的边CD 上，则AD 扫过的部分（即阴影部分）面积为（ ）A ．8π B ．222π-C ．23π-D ．6π 10．在围棋盒中有x 颗白色棋子和y 颗黑色棋子，从盒中随机取出一颗棋子，取得白色棋子的概率是25，如再往盒中放进3颗黑色棋子，取得白色棋子的概率变为14，则原来盒里有白色棋子（ ） A ．1颗B ．2颗C ．3颗D ．4颗二、填空题（共7小题，每小题3分，满分21分）11．如图，在Rt △ABC 中，∠ACB=90°，D 是AB 的中点，过D 点作AB 的垂线交AC 于点E ，BC=6，sinA=35，则DE=_____．12．如图，在圆O 中，AB 为直径，AD 为弦，过点B 的切线与AD 的延长线交于点C ，AD ＝DC ，则∠C ＝________度.13．不等式组11251x x -≥⎧⎨-<⎩的解集是_____；14．分解因式：ax 2﹣2ax+a=___________．15．小球在如图所示的地板上自由地滚动，并随机地停留在某块方砖上，那么小球最终停留在黑色区域的概率是_____________________．16．若2a b +=，3ab =-，则代数式32232a b a b ab ++的值为__________．17．口袋中装有4个小球，其中红球3个，黄球1个，从中随机摸出两球，都是红球的概率为_________． 三、解答题（共7小题，满分69分）18．（10分）向阳中学校园内有一条林萌道叫“勤学路”，道路两边有如图所示的路灯（在铅垂面内的示意图），灯柱BC 的高为10米，灯柱BC 与灯杆AB 的夹角为120°．路灯采用锥形灯罩，在地面上的照射区域DE 的长为13.3米，从D 、E 两处测得路灯A 的仰角分别为α和45°，且tanα=1．求灯杆AB 的长度．19．（5分）动画片《小猪佩奇》分靡全球，受到孩子们的喜爱.现有4张《小猪佩奇》角色卡片，分别是A 佩奇，B 乔治，C 佩奇妈妈，D 佩奇爸爸（四张卡片除字母和内容外，其余完全相同）.姐弟两人做游戏，他们将这四张卡片混在一起，背面朝上放好.（1）姐姐从中随机抽取一张卡片，恰好抽到A 佩奇的概率为 ；（2）若两人分别随机抽取一张卡片（不放回），请用列表或画树状图的分方法求出恰好姐姐抽到A 佩奇弟弟抽到B 乔治的概率.20．（8分）如图，已知正方形ABCD的边长为4，点P是AB边上的一个动点，连接CP，过点P作PC的垂线交AD 于点E，以PE为边作正方形PEFG，顶点G在线段PC上，对角线EG、PF相交于点O．（1）若AP=1，则AE= ；（2）①求证：点O一定在△APE的外接圆上；②当点P从点A运动到点B时，点O也随之运动，求点O经过的路径长；（3）在点P从点A到点B的运动过程中，△APE的外接圆的圆心也随之运动，求该圆心到AB边的距离的最大值．21．（10分）某通讯公司推出①，②两种通讯收费方式供用户选择，其中一种有月租费，另一种无月租费，且两种收费方式的通讯时间x(分)与费用y(元)之间的函数关系如图所示．有月租的收费方式是________(填“①”或“②”)，月租费是________元；分别求出①，②两种收费方式中y与自变量x之间的函数表达式；请你根据用户通讯时间的多少，给出经济实惠的选择建议．22．（10分）（1）观察猜想如图①点B、A、C在同一条直线上，DB⊥BC，EC⊥BC且∠DAE=90°，AD=AE，则BC、BD、CE之间的数量关系为______；（2）问题解决如图②，在Rt△ABC中，∠ABC=90°，CB=4，AB=2，以AC为直角边向外作等腰Rt△DAC，连结BD，求BD的长；（3）拓展延伸如图③，在四边形ABCD中，∠ABC=∠ADC=90°，CB=4，AB=2，DC=DA，请直接写出BD的长．23．（12分）如图，在平面直角坐标系xOy 中，直线y kx k =+与双曲线4=y x（x>0）交于点1)（，Aa ． 求a ，k 的值；已知直线l 过点(2,0)D 且平行于直线y kx k =+，点P （m ，n ）（m>3）是直线l 上一动点，过点P 分别作x 轴、y 轴的平行线，交双曲线4=y x（x>0）于点M 、N ，双曲线在点M 、N 之间的部分与线段PM 、PN 所围成的区域（不含边界）记为W ．横、纵坐标都是整数的点叫做整点．①当4m =时，直接写出区域W 内的整点个数；②若区域W 内的整点个数不超过8个，结合图象，求m 的取值范围． 24．（14分）如图，直线y 1=﹣x +4，y 2=34x +b 都与双曲线y =kx 交于点A （1，m ），这两条直线分别与x 轴交于B ，C两点．（1）求y 与x 之间的函数关系式； （2）直接写出当x ＞0时，不等式34x +b ＞kx 的解集；（3）若点P 在x 轴上，连接AP 把△ABC 的面积分成1：3两部分，求此时点P 的坐标．参考答案一、选择题（每小题只有一个正确答案，每小题3分，满分30分）1、B【解析】试题解析：第（1）个图形中面积为1的正方形有2个，第（2）个图形中面积为1的图象有2+3=5个，第（3）个图形中面积为1的正方形有2+3+4=9个，…，按此规律，第n个图形中面积为1的正方形有2+3+4+…+（n+1）=(3)2n n个，则第（6）个图形中面积为1的正方形的个数为2+3+4+5+6+7=27个．故选B．考点：规律型：图形变化类.2、A【解析】试题分析：根据y随x的增大而减小得：k＜0，又kb＞0，则b＜0，故此函数的图象经过第二、三、四象限，即不经过第一象限．故选A．考点：一次函数图象与系数的关系．3、D【解析】根据积的乘方与幂的乘方计算可得．【详解】解：（﹣ab2）3=﹣a3b6，故选D．【点睛】本题主要考查幂的乘方与积的乘方，解题的关键是掌握积的乘方与幂的乘方的运算法则．4、D【解析】根据全面调查与抽样调查的特点对各选项进行判断．【详解】解：了解某班每个学生家庭用电数量可采用全面调查；调查你所在学校数学教师的年龄状况可采用全面调查；调查神舟飞船各零件的质量要采用全面调查；而调查一批显像管的使用寿命要采用抽样调查．故选：D．【点睛】本题考查了全面调查与抽样调查：全面调查与抽样调查的优缺点：全面调查收集的到数据全面、准确，但一般花费多、耗时长，而且某些调查不宜用全面调查．抽样调查具有花费少、省时的特点，但抽取的样本是否具有代表性，直接关系到对总体估计的准确程度．5、A【解析】根据平行线的判定，可得AB与GE的关系，根据平行线间的距离相等，可得△BEG与△AEG的关系，根据根据勾股定理，可得AH与BE的关系，再根据勾股定理，可得BE的长，根据三角形的面积公式，可得G到BE的距离．【详解】连接GB、GE，由已知可知∠BAE=45°．又∵GE为正方形AEFG的对角线，∴∠AEG=45°．∴AB∥GE．∵2，AB与GE间的距离相等，∴GE=8，S△BEG＝S△AEG＝12S AEFG＝1．过点B作BH⊥AE于点H，∵AB=2，∴BH ＝AH ．∴HE ＝∴BE ＝设点G 到BE 的距离为h ．∴S △BEG ＝12•BE•h ＝12×h ＝1．∴h ＝5．即点G 到BE 故选A ． 【点睛】本题主要考查了几何变换综合题．涉及正方形的性质，全等三角形的判定及性质，等积式及四点共圆周的知识，综合性强．解题的关键是运用等积式及四点共圆的判定及性质求解． 6、A 【解析】根据特殊角三角函数值，可得答案． 【详解】tan60°故选：A ． 【点睛】本题考查了特殊角三角函数值，熟记特殊角三角函数值是解题关键． 7、C 【解析】根据黄金分割点的定义，知BC 为较长线段；则 AB ，代入数据即可得出BC 的值． 【详解】解：由于C 为线段AB=2的黄金分割点，且AC ＜BC ，BC 为较长线段；则．．【点睛】本题考查了黄金分割，应该识记黄金分割的公式：较短的线段=原线段的352倍，较长的线段=原线段的倍．8、C【解析】分析：先求出每个数的范围，逐一分析得出选项. 详解：A、3<π<4，故本选项不符合题意；B、1<π−2<2，故本选项不符合题意；C、<3，故本选项符合题意；D、<4，故本选项不符合题意；故选C.点睛：本题考查了估算无理数的大小，能估算出每个数的范围是解本题的关键.9、A【解析】本题首先利用A点恰好落在边CD上，可以求出A´C＝BC´＝1，又因为A´B可以得出△A´BC为等腰直角三角形，即可以得出∠ABA´、∠DBD´的大小，然后将阴影部分利用切割法分为两个部分来求，即面积ADA´和面积DA´D´【详解】先连接BD,首先求得正方形ABCD1ABA´＝∠DBD´＝45°，即可以求得扇形ABA´的面积为245118024＝ππ⨯⨯，扇形BDD´的面积为2451318028ππ⨯⨯＝，面积ADA´＝面积ABCD－面积A´BC－扇形面积ABA´11112424ππ⨯⨯－－－；面积DA´D´＝扇形面积BDD´－面积DBA´－面积BA´D´＝)3113111182282ππ⨯⨯－－＝－，阴影部分面积＝面积DA´D´+面积ADA´＝8π【点睛】熟练掌握面积的切割法和一些基本图形的面积的求法是本题解题的关键.10、B 【解析】试题解析：由题意得25134xx yxx y⎧⎪+⎪⎨⎪⎪++⎩＝＝，解得：23 xy⎧⎨⎩＝＝．故选B．二、填空题（共7小题，每小题3分，满分21分）11、15 4【解析】∵在Rt△ABC中，BC=6，sinA=3 5∴AB=10∴AC8==．∵D是AB的中点，∴AD=12AB=1．∵∠C=∠EDA=90°,∠A=∠A ∴△ADE∽△ACB，∴DE AD BC AC=即DE5 68=解得：DE=154．12、1【解析】利用圆周角定理得到∠ADB=90°，再根据切线的性质得∠ABC=90°，然后根据等腰三角形的判定方法得到△ABC为等腰直角三角形，从而得到∠C的度数．【详解】解：∵AB为直径，∴∠ADB=90°，∵BC为切线，∴AB⊥BC，∴∠ABC=90°，∵AD=CD，∴△ABC为等腰直角三角形，∴∠C=1°．故答案为1．【点睛】本题考查了切线的性质：圆的切线垂直于经过切点的半径．也考查了等腰直角三角形的判定与性质．13、x≤1【解析】分析：分别求出不等式组中两个不等式的解集，找出解集的公共部分即可确定出不等式组的解集.详解：10251xx-≤⎧⎨-<⎩①②，由①得：x 1.≤由②得：x3<.则不等式组的解集为：x1≤.故答案为x≤1.点睛：本题主要考查了解一元一次不等式组.14、a（x-1）1．【解析】先提取公因式a，再对余下的多项式利用完全平方公式继续分解．【详解】解：ax1-1ax+a，=a（x1-1x+1），=a（x-1）1．【点睛】本题考查了用提公因式法和公式法进行因式分解，一个多项式有公因式首先提取公因式，然后再用其他方法进行因式分解，同时因式分解要彻底，直到不能分解为止．15、试题分析：根据题意和图示，可知所有的等可能性为18种，然后可知落在黑色区域的可能有4种，因此可求得小球停留在黑色区域的概率为：.16、-12 【解析】分析：对所求代数式进行因式分解，把2a b +=，3ab =-，代入即可求解. 详解：2a b +=，3ab =-，()()23223222223212.a b a b ab ab a ab b ab a b ++=++=+=-⨯=- ，故答案为：12.-点睛：考查代数式的求值，掌握提取公因式法和公式法进行因式分解是解题的关键. 17、12【解析】先画出树状图，用随意摸出两个球是红球的结果个数除以所有可能的结果个数即可. 【详解】∵从中随意摸出两个球的所有可能的结果个数是12， 随意摸出两个球是红球的结果个数是6， ∴从中随意摸出两个球的概率=61=122； 故答案为：12.【点睛】此题考查的是用列表法或树状图法求概率．列表法可以不重复不遗漏的列出所有可能的结果，适合于两步完成的事件；树状图法适合两步或两步以上完成的事件；解题时要注意此题是放回实验还是不放回实验．用到的知识点为：概率=所求情况数与总情况数之比．三、解答题（共7小题，满分69分） 18、灯杆AB 的长度为2.3米．过点A 作AF ⊥CE ，交CE 于点F ，过点B 作BG ⊥AF ，交AF 于点G ，则FG =BC =2．设AF =x 知EF =AF =x 、DF =AF tan ADF ∠=6x，由DE =13.3求得x =11.4，据此知AG =AF ﹣GF =1.4，再求得∠ABG =∠ABC ﹣∠CBG =30°可得AB =2AG =2.3． 【详解】过点A 作AF ⊥CE ，交CE 于点F ，过点B 作BG ⊥AF ，交AF 于点G ，则FG =BC =2．由题意得：∠ADE =α，∠E =45°． 设AF =x ．∵∠E =45°，∴EF =AF =x ． 在Rt △ADF 中，∵tan ∠ADF =AF DF ，∴DF =AF tan ADF ∠=6x． ∵DE =13.3，∴x +6x=13.3，∴x =11.4，∴AG =AF ﹣GF =11.4﹣2=1.4． ∵∠ABC =120°，∴∠ABG =∠ABC ﹣∠CBG =120°﹣90°=30°，∴AB =2AG =2.3． 答：灯杆AB 的长度为2.3米． 【点睛】本题主要考查解直角三角形﹣仰角俯角问题，解题的关键是结合题意构建直角三角形并熟练掌握三角函数的定义及其应用能力． 19、（1）14；（2）112【解析】（1）直接利用求概率公式计算即可；（2）画树状图（或列表格）列出所有等可能结果，根据概率公式即可解答． 【详解】 （1）14； （2）方法1：根据题意可画树状图如下： 方法2：根据题意可列表格如下：弟弟姐姐A B C DA （A,B）(A,C) (A,D)B (B,A) (B,C) (B,D)C (C,A) (C,B) (C,D)D (D,A) (D,B) (D,C)由列表（树状图）可知，总共有12种结果，每种结果出现的可能性相同，其中姐姐抽到A佩奇，弟弟抽到B乔治的结果有1种：（A，B）.∴P（姐姐抽到A佩奇，弟弟抽到B乔治）1 12【点睛】本题考查的是用列表法或树状图法求概率，列表法可以不重复不遗漏的列出所有可能的结果，适合于两步完成的事件；树状图法适合两步或两步以上完成的事件；解决问题用到概率公式：概率=所求情况数与总情况数之比．20、（1）；（2）①证明见解析；②；（3）．【解析】试题分析：（1）由正方形的性质得出∠A=∠B=∠EPG=90°，PF⊥EG，AB=BC=4，∠OEP=45°，由角的互余关系证出∠AEP=∠PBC，得出△APE∽△BCP，得出对应边成比例即可求出AE的长；（2）①A、P、O、E四点共圆，即可得出结论；②连接OA、AC，由勾股定理求出AC=，由圆周角定理得出∠OAP=∠OEP=45°，周长点O在AC上，当P运动到点B时，O为AC的中点，即可得出答案；（3）设△APE的外接圆的圆心为M，作MN⊥AB于N，由三角形中位线定理得出MN=AE，设AP=x，则BP=4﹣x，由相似三角形的对应边成比例求出AE的表达式，由二次函数的最大值求出AE的最大值为1，得出MN的最大值=即可．试题解析：（1）∵四边形ABCD、四边形PEFG是正方形，∴∠A=∠B=∠EPG=90°，PF⊥EG，AB=BC=4，∠OEP=45°，∴∠AEP+∠APE=90°，∠BPC+∠APE=90°，∴∠AEP=∠PBC，∴△APE∽△BCP，∴，即，解得：AE=，故答案为：；（2）①∵PF⊥EG，∴∠EOF=90°，∴∠EOF+∠A=180°，∴A、P、O、E四点共圆，∴点O一定在△APE的外接圆上；②连接OA、AC，如图1所示：∵四边形ABCD是正方形，∴∠B=90°，∠BAC=45°，∴AC==，∵A、P、O、E四点共圆，∴∠OAP=∠OEP=45°，∴点O在AC上，当P运动到点B时，O为AC的中点，OA=AC=，即点O经过的路径长为；（3）设△APE的外接圆的圆心为M，作MN⊥AB于N，如图2所示：则MN∥AE，∵ME=MP，∴AN=PN，∴MN=AE，设AP=x，则BP=4﹣x，由（1）得：△APE∽△BCP，∴，即，解得：AE==，∴x=2时，AE的最大值为1，此时MN的值最大=×1=，即△APE的圆心到AB边的距离的最大值为．【点睛】本题考查圆、二次函数的最值等，正确地添加辅助线，根据已知证明△APE∽△BCP是解题的关键.21、(1)①30；（2）y1＝0.1x＋30，y2＝0.2x；（3）当通话时间少于300分钟时，选择通话方式②实惠；当通话时间超过300分钟时，选择通话方式①实惠；当通话时间为300分钟时，选择通话方式①，②花费一样．【解析】试题分析：（1）根据当通讯时间为零的时候的函数值可以得到哪种方式有月租，哪种方式没有，有多少；（2）根据图象经过的点的坐标设出函数的解析式，用待定系数法求函数的解析式即可；（3）求出当两种收费方式费用相同的时候自变量的值，以此值为界说明消费方式即可．解：（1）①；30；（2）设y1=k1x+30，y2=k2x，由题意得：将（500，80），（500，100）分别代入即可：500k1+30=80，∴k1=0.1，500k2=100，∴k2=0.2故所求的解析式为y1=0.1x+30；y2=0.2x；（3）当通讯时间相同时y1=y2，得0.2x=0.1x+30，解得x=300；当x=300时，y=1．故由图可知当通话时间在300分钟内，选择通话方式②实惠；当通话时间超过300分钟时，选择通话方式①实惠；当通话时间在300分钟时，选择通话方式①、②一样实惠．22、（1）BC=BD+CE，（2）10（3）32【解析】（1）证明△ADB≌△EAC，根据全等三角形的性质得到BD=AC，EC=AB，即可得到BC、BD、CE之间的数量关系; （2）过D作DE⊥AB，交BA的延长线于E，证明△ABC≌△DEA，得到DE=AB=2，AE=BC=4，Rt△BDE中，BE=6，根据勾股定理即可得到BD的长；（3）过D作DE⊥BC于E，作DF⊥AB于F，证明△CED≌△AFD，根据全等三角形的性质得到CE=AF，ED=DF，设AF=x，DF=y，根据CB=4，AB=2，列出方程组，求出,x y的值，根据勾股定理即可求出BD的长.【详解】解：（1）观察猜想结论：BC=BD+CE，理由是：如图①，∵∠B=90°，∠DAE=90°，∴∠D+∠DAB=∠DAB+∠EAC=90°，∴∠D=∠EAC，∵∠B=∠C=90°，AD=AE，∴△ADB≌△EAC，∴BD=AC，EC=AB，∴BC=AB+AC=BD+CE；（2）问题解决如图②，过D作DE⊥AB，交BA的延长线于E，由（1）同理得：△ABC≌△DEA，∴DE=AB=2，AE=BC=4，Rt△BDE中，BE=6，由勾股定理得：22BD=+=；62210（3）拓展延伸如图③，过D作DE⊥BC于E，作DF⊥AB于F，同理得：△CED≌△AFD，∴CE=AF ，ED=DF ， 设AF=x ，DF=y ，则42x y x y +=⎧⎨+=⎩，解得：13,x y =⎧⎨=⎩ ∴BF=2+1=3，DF=3，由勾股定理得：223332BD =+=．【点睛】考查全等三角形的判定与性质，勾股定理，二元一次方程组的应用，熟练掌握全等三角形的判定与性质是解题的关键. 23、（1）4a =，=2k ；（2）① 3，② 3 4.5m <≤. 【解析】（1）将1)（，Aa 代入4=y x可求出a ，将A 点坐标代入y kx k =+可求出k ； （2）①根据题意画出函数图像，可直接写出区域W 内的整点个数；②求出直线l 的表达式为24y x =-，根据图像可得到两种极限情况，求出对应的m 的取值范围即可. 【详解】解：（1）将1)（，A a 代入4=y x得a=4 将14)（，A代入=4+k k ，得=2k （2）①区域W 内的整点个数是3②∵直线l 是过点(2,0)D 且平行于直线22y x =+ ∴直线l 的表达式为24y x =-当24=5-x 时，即=4.5x 线段PM 上有整点 ∴3 4.5m <≤【点睛】本题考查了待定系数法求函数解析式以及函数图像的交点问题，正确理解整点的定义并画出函数图像，运用数形结合的思想是解题关键.24、（1）3yx；（2）x＞1；（3）P（﹣54，0）或（94，0）【解析】分析：（1）求得A（1，3），把A（1，3）代入双曲线y=kx，可得y与x之间的函数关系式；（2）依据A（1，3），可得当x＞0时，不等式34x+b＞kx的解集为x＞1；（3）分两种情况进行讨论，AP把△ABC的面积分成1：3两部分，则CP=14BC=74，或BP=14BC=74，即可得到OP=3﹣74=54，或OP=4﹣74=94，进而得出点P的坐标．详解：（1）把A（1，m）代入y1=﹣x+4，可得m=﹣1+4=3，∴A（1，3），把A（1，3）代入双曲线y=kx，可得k=1×3=3，∴y与x之间的函数关系式为：y=3x；（2）∵A（1，3），∴当x＞0时，不等式34x+b＞kx的解集为：x＞1；（3）y1=﹣x+4，令y=0，则x=4，∴点B的坐标为（4，0），把A（1，3）代入y2=34x+b，可得3=34+b，∴b=94，∴y2=34x+94，令y2=0，则x=﹣3，即C（﹣3，0），∴BC=7，∵AP把△ABC的面积分成1：3两部分，∴CP=14BC=74，或BP=14BC=74∴OP=3﹣74=54，或OP=4﹣74=94，∴P（﹣54，0）或（94，0）．点睛：本题考查了反比例函数与一次函数的交点问题：求反比例函数与一次函数的交点坐标，把两个函数关系式联立成方程组求解，若方程组有解则两者有交点，方程组无解，则两者无交点．。
2024年广东省深圳市宝安区数学九年级第一学期开学学业质量监测试题【含答案】
2024年广东省深圳市宝安区数学九年级第一学期开学学业质量监测试题题号一二三四五总分得分A 卷（100分）一、选择题（本大题共8个小题，每小题4分，共32分，每小题均有四个选项，其中只有一项符合题目要求）1、（4分）不等式321x ->的解集为（）.A ．2x >B ．1x <C ．2x <D ．1x >2、（4分）若a ＝﹣0.32，b ＝﹣3﹣2，c ＝（﹣13）﹣2，d ＝（﹣15）0，则（）A ．a ＜b ＜c ＜d B ．b ＜a ＜d ＜c C ．a ＜d ＜c ＜b D ．c ＜a ＜d ＜b 3、（4分）一次函数y ＝kx －k(k ＜0)的图象大致是()A ．B ．C ．D ．4、（4分）在“爱我永州”中学生演讲比赛中，五位评委分别给甲、乙两位选手的评分如下：甲：8、7、9、8、8乙：7、9、6、9、9则下列说法中错误的是（）A ．甲、乙得分的平均数都是8B ．甲得分的众数是8，乙得分的众数是9C ．甲得分的中位数是9，乙得分的中位数是6D ．甲得分的方差比乙得分的方差小5、（4分）某铁工艺品商城某天销售了110件工艺品，其统计如表：货种A B C D E 销售量（件）1040301020该店长如果想要了解哪个货种的销售量最大，那么他应该关注的统计量是（）A ．平均数B ．众数C ．中位数D ．方差6、（4分）某小组7名同学积极捐出自己的零花钱支援地震灾区，他们捐款的数额分别是（单位：元）：50，20，50，30，50，25，1．这组数据的众数和中位数分别是（）．A ．50，20B ．50，30C ．50，50D ．1，507、（4分）下列多项式中不能用公式进行因式分解的是（）A ．a 2+a +14B ．a 2+b 2-2ab C ．2225a b -+D ．24b --8、（4分）用配方法解方程2230x x --=，方程可变形为（）A ．(x +1)2=4B ．(x -1)2=4C ．(x +1)2=2D ．(x -1)2=2二、填空题（本大题共5个小题，每小题4分，共20分）9、（4分）在一张直角三角形纸片的两直角边上各取一点，分别沿斜边中点与这两点的连线剪去两个三角形，剩下的部分是如图所示的直角梯形，其中三边长分别为2、3、4，则原直角三角形纸片的斜边长是.10、（4分）是一个正整数，则正整数m 的最小值是___________．11、（4分）如图，一张纸片的形状为直角三角形，其中90C ∠=，6AC cm =，8BC cm =，沿直线AD 折叠该纸片，使直角边AC 与斜边上的AE 重合，则CD 的长为______cm ．12、（4分）若一组数据123,,a a a 的平均数4，方差3，则数据12a +，22a +，32a +的方差是_________.13、（4分）在平面直角坐标系内，直线l ⊥y 轴于点C(C 在y 轴的正半轴上)，与直线y=14x 相交于点A ，和双曲线y=2x 交于点B ，且AB=6，则点B 的坐标是______．三、解答题（本大题共5个小题，共48分）14、（12分）如图，方格纸中每个小正方形的边长都是1个单位长度，Rt △ABC 的三个顶点分别为A （0，4），B （﹣4，2），C （0，2）．（1）画△A 1B 1C 1，使它与△ABC 关于点C 成中心对称；（2）平移△ABC ，使点A 的对应点A 2坐标为（﹣2，4），画出平移后对应的△A 2B 2C 2；（3）若将△A 1B 1C 1绕点P 旋转可得到△A 2B 2C 2，请直接写出旋转中心P 的坐标．15、（8分）计算：（1）(2)5)++16、（8分）如图，在ABC ∆中，AB AC =，AD BC ⊥于点D ，BC 10cm =，8AD cm =.点P 从点B 出发，在线段BC 上以每秒3cm 的速度向点C 匀速运动；与此同时，垂直于AD 的直线m 从底边BC 出发，以每秒2cm 的速度沿DA 方向匀速平移，分别交AB 、AC 、AD于点E 、F 、H ，当点P 到达点C 时，点P 与直线m 同时停止运动，设运动时间为t 秒（0t >）.（1）当2t =时，连接DE 、DF ，求证：四边形AEDF 为菱形；（2）当3t =时，求PEF ∆的面积；（3）是否存在某一时刻t ，使PEF ∆为以点E 或F 为直角顶点的直角三角形？若存在，请求出此时刻t 的值；若不存在，请说明理由.17、（10分）小明和小兵两人参加体育项目训练，近期的5次测试成绩如下表所示：1次2次3次4次5次小明1014131213小兵1111151411根据以上信息，解决以下问题：（1）小明成绩的中位数是__________.（2）小兵成绩的平均数是__________.（3）为了比较他俩谁的成绩更稳定，老师利用方差公式计算出小明的方差如下（其中x 表示小明的平均成绩）;()()()()()222221452231 1.845x x x x x x x x S x x ⎡⎤=-+-+-+-+-=⎣⎦小明请你帮老师求出小兵的方差，并比较谁的成绩更稳定。
2019-2020学年宝安区九年级第一次调研测试卷参考答案20191228
2019-2020学年宝安区九年级第一次调研测试卷语文答案一、单项选择题1.D（A “走投无路”的“投”，“瞥见”应读piē；B“宽宥”应读yòu ；C“形销骨立”的“消”，“摇曳”应读yè。
）2.A“歇斯底里”指情绪异常激动，举止失常，句中演讲很精彩，不可能举止失常。
“强聒不舍”指唠唠叨叨说个没完，使人厌烦。
句中班主任的规劝“用心良苦”，用“强聒不舍”不太合适。
“附庸风雅”是为了装点门面而结交文人，参加有关文化活动（多含贬义）。
3.B A项是对偶；C项是排比；D项是比喻。
B项“像”表示列举，不是比喻句。
4.B文段先列举宠物市场的例子，再分析原因。
有几个关键词，先讲所有宠物，再讲“单是猫狗”，“1707亿元”后接“这千亿级的生意”，“独身人群”后接“单独居住的人”。
5.C“既然……就……”表示因果关系。
二、古诗文能力考查（一）古诗文默写6.（1）沉舟侧畔千帆过（2）万古惟留楚客悲（3）豪兴徜徉（4）戍鼓断人行（5）槲叶落山路（6）千里共婵娟（7）佳木秀而繁阴（8）云横秦岭家何在；溪云初起日沉阁；直挂云帆济沧海。
（二）文言文阅读能力7.（1）探求（2）如果没有（3）送，给（4）告诫8.（1）不因外物和自己处境的变化而喜悲。
（2）（岳飞）没有接受（送的美女），吴玠就更加敬仰佩服岳飞了。
9.共同点：都是忧国忧民，不考虑自己。
对岳飞的话的理解：谈到为官廉洁，加强军队的建设等等，言之成理即可。
参考译文：吴玠一向敬仰岳飞，愿意与他结为好友，打扮了美女送给他。
岳飞说：“主上终日为国事操劳，怎能是臣子贪图享乐之时？”岳飞没有接受，将美女送回。
吴玠就更加的敬仰岳飞了。
岳飞嗜酒，皇帝告诫他：“爱卿将来到了河朔（把金人赶过黄河的意思），才可以这样酗酒。
”于是从此不再饮酒。
皇帝曾经想要给岳飞建造一个房子，岳飞推辞道：“敌人尚未被消灭，怎能谈论家事！”有人问：“天下何时才会太平？”岳飞说：“文官不爱财，武将不怕死，天下就太平了。
深圳市宝安区2021-2022学年-有答案-第一学期开学考试九年级英语模拟试卷
深圳市宝安区2021-2022学年第一学期开学考试九年级英语模拟试卷一、单选题1. ---I wonder whether 5G is widely used.---I am not sure. But I think we will use it soon.A.want to useB.want to knowC.want to answer2. ---Steven, did you make an apology to Wilson for being late?---Yes, I did. I’m so regretful.A.say yesB.say helloC.say sorry3. ---These two brothers look too similar in appearance for me to tell them apart(辨别).---So do I.A.patternsB.looksC.characters4. ---When did you get home last night?---It was nearly ten o’clock.A.close toB.hardlyC.almost not5. ---Katrina, the cakes you baked are very delicious. How did you do that?---I am prepared to teach you if you have time now.A.would be pleasedB.am planningC.get ready6. ---I didn’t underst and how to do the sum in class this morning.---Why didn’t you raise your hand to ask the teacher for help?A.collectB.put upC.give food to7. ---Don’t lie around all day. You should look for a job.---OK. I will do my best to find a job.A.lie on the bedB.do nothingC.cheat others8. ---Her eyes popped out when she heard the news.---I am sure the news must be very surprising.A.changed suddenlyB.saw nothingC.opened wide9. If something you, it makes you get interested in it.A.attractsB.remindsC.satisfies10. A(n) is something said or written to tell people of a possible danger of problem.A.descriptionB.sketchC.warning11. The young police officer filmed their conversation . And nobody else knew it.A.secretlyB.separatelyC.seriously12. ---Thank you for lending me the storybook. I will give it back to you .---Just take it easy. I have finished reading it.A.in my spare timeB.in a secondC.as soon as possible13. ---What the accident?---We’re not sure yet. But I think the driver should take the .A.made; organizationB.created; behaviourC.caused; responsibility14. ---People will easily illness, so they should to exercise every day to improve their health.---Many people would like to. However, they don’t have time to do that.A.offer toB.suffer fromC.expect to15. ---The little boy ran away .---Do you know what happened to him?A.in fearB.in dangerC.in future二、完型填空Einstein often ______ invitations to explain his theories(学说) at different universities. On these trips, his driver Hans often said to him, “It’s a pleasure to drive a genius like you, Dr Einstein.”One evening, on their way to a university, Einstein said, “I’m so ______. I wish I could avoid(避免) giving my lecture tonight, Hans, but I don’t want to let my audience ______.”“I know what to do,” said Hans. “I can give the lecture for you. You can ______ me. I’ve listened to your lecture so many times that I’v e learnt it by heart. ______ knows you at this university, so they won’t find out.”So, they changed places. At the university, Hans was ______ the front of the hall. Einstein took a seat, listened to Hans give his lecture without difficulty, and joined in the applause at the end.______, before Hans left, a man shouted, “I’d like to ask you a question.” He then asked a question so ______ that Hans had no idea what he was talking about.Einstein turned pale. “Oh no!” he thought. “Now we’re in trouble.” But Hans just______ and said, “That’s such an easy question that even my driver can answer it. Hans, please…”Einstein stood up and answered the question perfectly.They left the university, with Einstein driving. A little later, Hans offer ed to drive. “No,” laughed Einstein. “It’s a pleasure to drive a ______ like you, Hans.”（1）A.sentB.receivedC.lost（2）A.tiredB.excitedC.relaxed（3）A.upB.inC.down（4）A.look atB.believe inC.play against（5）A.NobodyB.AnybodyC.Somebody（6）A.gone intoB.led toC.cared for（7）A.SinceB.HoweverC.Although（8）A.easyB.simpleC.hard（9）ughedB.criedC.shouted（10）A.scientistB.driverC.genius三、阅读单选A new Metro train for Metro Line 6 has arrived at Changzhen Depot(车库) in Guangming District, marking the start of tests for the operation of Line 6, which will be put into use in June 2020.Metro Line 6 has a major line in Phase I and an extension(延长) line in Phase II. Phase I runs 37 kilometers from Shenzhen North S tation to Songgang Station, covering Bao’an, Longhua and Guangming districts. It has 20 stations, including six stations interchanging(换乘) with lines 4, 5, 11 and 13. With holding at least 2,502 passengers, the six-carriage train was designed to run at 100 kilometers per hour.The extension line starts at Shenzhen North Station and runs southward to Shenzhen Science Museum. The 11.77-km extension line has seven stations, including five interchange stations with lines 1, 3, 7 and 9.In another develo pment, Metro Line 9’s extension line is expected to open before the end of the year. Once it is put into operation, a trip between Qianhai and Wenjin in Luohu Districtwill take 44 minutes. The 10.8-km extension line is a major rail linking(连接) Qianhai, Nanyou and Shenzhen Technology Park with Luohu and Futian districts. It starts at Hongshuwan South Station and ends at Qianwan in Qianhai with 10 stations, including five interchange stations with lines 5, 11, 12, 13 and 15.（1）How long is the whole Metro Line 6?A.37 kilometers.B.47.8 kilometers.C.22.57 kilometers.D.48.77 kilometers.（2）Which Metro Line CANNOT be interchanged in Metro Line 6?A.Metro Line 2.B.Metro Line 11.C.Metro Line 9.D.Metro Line 5.（3）Which of the following can we learn from the passage?A.The major line of Metro Line 6 starts from Shenzhen Science Museum.B.There are 27 stations in Metro Line 6, including 11 interchange stations.C.The train in Metro Line 9’s extension line can hold at least 2,502 passengers.D.We can go to Shenzhen Technology Park in Futian by taking Metro Line 9.（4）Which page can we read this passage in the newspaper?A.Sports News.B.International News.C.Local News.cational News.Kathie, I remember the first day that 1 met you. I remember the look on your face as you rushed out from your dorm and slammed directly into me. You knocked me over, both metaphorically (比喻地) and physically. You were dressed in a sports bra and tight little shorts and I was suddenly feeling a little bitter that I was picking your roommate up for dinner and not you.No, it can't start that way.Who starts a speech with a memory about what bra someone was wearing? How about this?I remember staring at the projector image of stars in Astronomy and thinking only of your eyes. I only signed up for Astronomy because you said were taking it. You hadn't said it to me, of course, but to one of your girlfriends. I was behind you in the sandwich line at the student center and l heard you ask that redhead girl—Jessica Randolph, I think her name was. Well, it's Johnson, now; she's married with a baby on the way. I heard you ask Jessica if she thought the professor would talk about the possibility of aliens. That was all it took. I signed up for Astronomy almost immediately.That sounds like I'm a huge stalker (跟踪狂). I won't share that story. No one wants to hear about aliens and about the stars in your eyes. No one wants to hear about Jessica Johnson. Jessica and her husband will be there today. She'll cry. I'm certain that she'll cry. A lot of people will, I'd assume.Will I?I can't think about that. I don't want to mess things up in front of everyone. All of our family and friends will be there, watching, and I’ve never been good at public speaking.I remember sitting next to you on the couch while I waited for your roommate to get ready for dinner. She took so long to do her hair and makeup. It was intentional, I think. She thought it was classy to make me wait. You never did.Anyway, I was waiting for your roommate to be ready for our date. All I wanted to do was put my hand over yours as you changed the channels. Something funny would happen on the television and you'd laugh so hard you'd snort. I loved you even then, I think.I can't talk about that. People will think Tm a cheater. I never cheated. I was set up with your roommate on a blind date. It was you, you, always you from the moment I saw you until today. I broke up with her that night, I remember. We never even made it out of the parking lot. I don't know what made me do it, I just knew that whenever I closed my eyes I couldn't picture anything but your face.Today is so important, so critical. I can't mess up. Not when you'll be there, so peaceful and lovely.Another, then.What about the day I proposed? I had planned it out so carefully and nothing went right. The fower order was wrong. I burned my new shirt with the iron. The sweater I had ordered for your stupid dog--the one that read, "will you marry my daddy?" —arrived in the mail just that morning and was two sizes too small. I squeezed him into it anyway, and it somehow made his already giant head look even bigger. Maybe that's why you couldn't stop laughing when you saw him. You were laughing—loudly—your dress half on and your nails half painted. I had come to get you for our date too early. I couldn't help it. I was sweating through my burnt shirt and holding wilted flowers, kneeling like a fool. You didn't say yes or no, but the stars in your eyes were confirmation enough.I can share that. I've shared it a hundred times before. Everyone wanted to know the engagement story, which led us to the altar (圣坛).The altar.I stood up there and stammered (口吃)through the speech I had prepared for you—through the promise I had written for you. It was nowhere near as hard as this. My vows (誓言), then, included that eternal drivel, for better or for worse. Till death do us part.How was I to know?How was I to know there was another speech to write, another vow to make?What story do I share, standing before our friends and family—before you? What goodbye can I give that honors your memory? I am selfish with my memories of you. I don't want to share them.You are among the stars, now—scattered among the universe that first led me to you. The universe called you home too soon, and I will let the universe praise you highly.I don't need a memory to say goodbye. I only need to remember the vow I made then, and the vow I'll make now.I'll see you again.（1）What can be inferred about Jessica Johnson?A.She was the author's ex-girlfriend.B.She is becoming a mother very soon.C.She was unpopular with people at college.D.She is attending Kathie's wedding ceremony.（2）Why does the author say that people will think of him as a cheater?A.Because he shifted his love to another woman.B.Because he fell in love with Kathie at first sight.C.Because he got to know his ex-girlfriend through a blind-date.D.Because he put his hand over Kathie's when waiting for her roommate.（3）What can be inferred from the underlined sentence "your dress half on and your nails half painted"?A.Kathie cared little about her appearance.B.The author arrived early to please Kathie.C.Kathie was too busy with the dog to make up.D.The author couldn't wait to propose to Kathie.（4）How does the author develop the passage?A.By telling stories.B.By drawing inferences.C.By listing examples.D.By making comparisons.（5）The tone of the author can be described as__________.A.regretfulB.affectionateC.objectiveD.optimistic（6）The author writes this passage to_________.A.win back his wife's loveB.change readers' attitude to lifeC.teach readers to accept misfortuneD.express his deep love for his wifeBeatboxing is the art of making rhythm(节奏) and musical sounds with one’s mouth and voice. It is also a good way to help kids who are suffering from cancer(癌症).Justin Sanchez is a student at Sugar Land’s Logos Preparatory Academy, US. He is called MC Cure-Rageous. Beatboxing was only a hobby at first, as Sanchez loves rhythm and sound. But now he uses it to help kids to deal with cancer and make them happy.It all started when Sanchez took part in a fundraising (筹款) activity for his classmate who got cancer. Everybody was shocked (震惊的) when they first heard his musical sounds. Host of the event, the L3 Foundation(基金会), came to Sanchez at that time. They asked if he’d like to be part of the fundraiser. Therefore, the teenager thought he could use his hobby for good.With the help of the L3 Foundation, Sanchez held a successful beatboxing activity for Candlelighters. This is a childhood family cancer center. The kids there were very happy to listen to Sanchez perform.（1）What is the meaning of the underlined word “beatboxing” in Chinese?A.拳击B.打击乐C.口技D.打鼓（2）Why was everybody shocked when hearing Sanchez’s performance?A.Because it was wonderful.B.Because he could sing like a musician.C.Because he performed badly.D.Because he didn’t know about any art.（3）What did Sanchez do for Candlelighters?A.He gave some money to children.B.He performed to make money.C.He did beatboxing to make children happy.D.He visited every child in the center.（4）What is the main idea of the passage?A.A teenager plays a key role in a hospital.B.Beatboxing helps kids with cancer.C.There is a new form of music.D.Beatboxing is getting more and more popular among kids.For most teenagers, the kitchen may be a mysterious(神秘的) place. But Flynn McGarry is already able to take charge of(掌管) a kitchen.At the age of 15, he was already a well-known teenage chef in the US. He has opened his own dining club at home and works with some of the best restaurants in his country. McGarry’s love for cooking started at the age of 10. He p racticed his knife skills after school and taught himself from books and the Internet. In his room, there are no video games, basketballs or movie posters, but pots, cutting boards and pans(平底锅).When he was 11, McGarry’s parents helped turn his bedroo m into a monthly supper club called Eureka. Each month, he hosted his mother’s friends and soon won the title of “culinary prodigy(烹饪神童)”. Now, people pay $160(979 yuan) per person to eat at Eureka.McGarry does not stick with just simple types of cuisine(菜肴). He likes creating interesting dishes. “I could take a carrot and raise it to this amazing level that you’d never think you’re eating a carrot,” he said. The New York Times described his meals as “creative enough to make an experienced chef inferior(逊色的).”As for the future, McGarry dreams of being a Michelin-starred chef. He plans to open his own restaurant by 19 and make it, as he puts it, “the best restaurant in the world.”（1）If Martin go to Eureka with his parents for dinner, how much do they pay in total?A.$160.B.480 yuan.C.$2,937.D.2937 yuan.（2）Which of the following is TRUE according to the passage?A.People can eat at Eureka for free.B.McGarry’s parents supported his hobby.C.McGarry hosts Eureka for his friends.D.McGarry started Eureka four years ago.（3）According to The New York Times, McGarry’s dishes are _____.A.strangeB.cheapC.inferiorD.delicious（4）What is McGarry’s dream for the future?A.To become a wealthy cook.B.To open his own restaurant.C.To cook for movie stars.D.To work at a famous restaurant.Last holiday my family decided to go back to the countryside in New Hampshire again, but I found it boring．It was bad that I had to sleep in the same small bed with my brother．However, this trip ended up being fun for me because I met a very ________While I was walking in the countryside, I saw a man carrying a small brown bag． The man looked like a ghost（鬼） in his white clothes． When he looked at me, I felt scared（害怕的）．I wanted to run away when the man spoke to me． "Hello, beautiful day, isn't it? " he said． The man talked a lot． I wasn't listening very carefully because I was looking at his little bag． I wanted to know what was in it!He saw me looking at the bag and he asked me if I would like to see what was inside of it． Out came a beautiful puppy （小狗）． The brown puppy was small and only about two months old．The man then asked me, " Would you like to keep this puppy? "I had always wanted a puppy and now I had the chance．I thanked him, took the puppy and ran home．For the rest of that summer, I played with him all the time． And after the trip, I took him home．He is a friend to both my brother and me, a warm little ball of happiness in our lives．I've always wanted to thank the man because he changed my life． The gift has given me years of pleasure（快乐）． And I never have boring family holidays anymore．（1）The "special friend"in the third paragraph refers to （指的是）________．A. a manB. a ghostC. a puppyD. a bag．（2）Why did the writer keep looking at the man's little bag？________A. Because the man looked nervous while carrying it．B. Because he wanted to know what was inside．C. Because he thought there was something dangerous in it．D. Because the bag was so small．．（3）What did the writer do with （处理）the puppy ？________A. He left in the countryside．B. He gave it to his brother．C. He took it home after the holiday．D. He gave it back to the man．四、语法填空In ancient China, the State of Wu made an attack on the State of Yue．The king of Wu wa s badly hurt and soon died．His son Fu Chai became the new king．Fu was very sad and ang ry and he decided to fight back for his father's death．He trained his army strictly until it was very strong．Three years later, he led his army against the State of Yue and caught its king G ou Jian, who was taken to the State of Wu．Gou Jian was put into a small black stone house which was full of terrible smell and was m ade to raise horses．Gou worked hard and tried to keep himself quiet, but he never forgot his pain．Many years later, he was set free．Gou secretly trained his army after he went back to his own state．In order to make himself strong-minded he slept on firewood and ate a gall bladder（尝胆） before having dinner and going to bed every night．After a few years, his country beca me strong once more．Then Gou took hold of a golden chance to fight against Wu and won t he war in the end．If one voluntarily（自愿） works very hard and voluntarily stands up to pains and difficulties in order to succeed, we might call him a"Gou Jian", and his story, a"Gou Jian's story"．（1）________ was seriously hurt and died．A.Gou Jian's father ．B.Fu Chai's father.C.Gou Jian's brother．（2）Three years later________ was caught and taken to the state of Wu．A.Gou Jian.B.Fu Chai.C.Gou Jian's father．（3）Gou Jian________ when he was in the state of Wu．A.forgot his pain.B.raised horses.C.trained his army．（4）Which of the following is TRUE？________A.The gall bladders tasted good．B.Gou Jian loved horse-raising．C.Finally Gou Jian was set free．（5）The story mainly tells us that________A.a country without a strong army is easy to defeat．B.if someone attacks you，you should just fight back．C.if you face difficulties bravely without giving up，you'll finally succeed．五、书信作文最近，电视剧《少年派》和《小欢喜》受到了大家的关注。
2022-2023学年广东省深圳市宝安区宝安中学中考一模物理试题含解析
2023年中考物理模似试卷注意事项1．考生要认真填写考场号和座位序号。
2．试题所有答案必须填涂或书写在答题卡上，在试卷上作答无效。
第一部分必须用2B 铅笔作答；第二部分必须用黑色字迹的签字笔作答。
3．考试结束后，考生须将试卷和答题卡放在桌面上，待监考员收回。
一、单项选择题（本大题7小题，每题3分，共21分）1．如图所示，将甲、乙两个质量不同的小球在相同的高度，以相同的初速度竖直上抛，甲球上升过程中依次经过Q、P两点，忽略空气阻力，下列说法正确的是A．上抛的瞬间，两球的动能相等B．甲球在P点的重力势能小于在Q点的重力势能C．甲球在P点的机械能等于在Q点的机械能D．从开始竖直上抛到两小球上升到同一高度h，两球克服重力做的功相等2．下列有关热的说法，正确的是A．晶体在熔化过程中温度不变，内能也不变B．物体的温度越高，所含的热量越多C．白炽灯泡用久了灯泡内壁会变黑，是因为钨丝发生了汽化和凝华D．夏天，在阳光照射下，地面温度高于湖水表面温度是因为水的比热容较大3．发现电流磁效应的科学家是A．安培B．奥斯特C．库仑D．伏特4．如图是一种自动测定油箱内油面高度的装置，R是转动式滑动变阻器，它的金属滑片P是杠杆的一端，下列说法正确的是（）A．电路中R和R0是并联的B．油量表是由电流表改装而成的C．油位越高，流过R的电流越大D．油位越低，R两端的电压越小5．下列光现象与日食的形成原因不同的是A．小孔成像B．雨后彩虹C．手影游戏D．树下阴影6．下列各电学实验，都可以通过调节滑动变阻器来测量多组电流和电压，其中为了减小实验误差的是（）A．电阻的大小与哪些因素有关B．电流的大小与哪些因素有关C．用“伏安法”测电阻器电阻D．用“伏安法”测小灯泡功率7．有甲、乙、丙三个带电的泡沫塑料小球，甲带正电．先用甲靠近乙，发现乙被排斥；再用乙靠近丙，丙被吸引（如图）．则下列判断正确的是（）A．乙带正电，丙带正电B．乙带负电，丙带负电C．乙带负电，丙带正电D．乙带正电，丙带负电二、填空题（本大题7小题，共21分）8．爱米用力拉弓射箭，力的作用效果是改变了弓的_____，箭以30m/s的速度飞行60m，所用时间为_____．9．如图所示的电路，电源电压保持不变．电键S1、S2处于断开状态，先闭合电键S1，小灯不发光．若灯L、电阻R 中仅有一个出现故障，请根据相关信息写出闭合电键S2前后，电流表示数的变化情况及相对应的故障．示例：电流表示数始终为零，电阻R断路．（写出示例以外的两种情况）①_____________________；②____________________.10．检查视力时，视力表放在被测者头部的后上方，被测者识别对面墙上镜子里视力表的_____（选填“虚”或“实”）像，如图所示。
2021-2021深圳市宝安区九年级英语一模卷
2021-2021深圳市宝安区九年级英语一模卷2021-2021年宝安区九年级第一学期期末质量检测英语试卷听力（15分）略笔试（85分）II.词汇。
（15小题，每小题1分，小计15分）i. 从下面每小题的A、B、C三个选项中选出可以替换划线部分的最佳选项，并在答题卡上将相应的字母编号涂黑。
（8小题，每小题1分） 14.---What’s wrong with you, David?---I am not quite well these days. Maybe it’s because I eat more and exercise less recently.A. more quicklyB. more than enoughC. not as often as before 15.--Jenny, you’re always the first to get to the classroom.---En. That’s because I l eave home early every morning just to avoid the rush hour. A. keep in touch with B. keep away from C. keep up with16.--Cathy’s tears poured out as soon as she drew the photo of herparents from the box.--How poor she is ! She hasn’t seen he r parents for two years. A.looked at B. took out C. looked for 17.--How is your new English teacher?--She has a good knowledge of English as well as a good sense of humor. A. and B. but C. Or 18.--John failed the Maths exam again,didn’t he?---Yes. He shows no interest in Maths at all. Can you give him some suggestions?A. feels happy withB. has no ideaC. is not interested in19. --China’s first female fighter pilot.Yu Xu, died in an accident on November 12th . ---What a pity! She was really young. A. How celebrated! B. How regretful! C. How excited!20. ---Using mindmaps in English learning is popular nowadays. What do you think of it,Mike?---Well, to a certain degree, I think it helps us organize the informationwe need. A. as a matter of fact B. for example C. in a way 21. --Did youvisit the 2021 Shenzhen Hi-tech Fair last week?--Yes. With the development of technology, many new products have been invented.A. growthB. developmentC. theoryii. 根据句子意思，从下面每小题的A、B、C三个选项中选出填入横线上的最佳选项，并在答题卡上将相应的字母编号涂黑。
宝安初三一模数学试题及答案
宝安区九年级调研测试卷数 学说明：1.全卷分二部分，第一部分为选择题，第二部分为非选择题，共 4页。
考试时间90分钟，满分100分。
2.考生必须在答题卡上按规定作答；答题卡必须保持清洁，不能折叠。
3.答题前，请将姓名、考生号、考场等用规定的笔填涂在答题卡指定的位置上。
4.本卷选择题1—10，每小题选出答案后，用2B 铅笔将答题卡选择题答题区内对应题目的答案标号涂黑；非选择题11—22，答案（含作辅助线）必须用规定的笔，按作答题目序号，写在答题卡非选择题答题区内相应位置上，写在本卷或其他地方无效。
第一部分 选择题一、选择题（本题共有10小题，每小题3分，共30分，每小题有四个项选，其中只有一个是正确的） 1．21-的相反数是（ ）。
A ． 21- B ． 21C ．2-D ．22．下列运算正确的是（ ）。
A ．a 2×a 2＝2a 2B ．2a 2+3a 2＝5 a 4C ．( a 3 )3＝a 9D ．a 6÷a 3＝a 2 3．数据0. 00598用科学记数法（保留两位有效数字）表示为（ ）。
A ．5.9×10 - 3B ．6.0×10 - 3C ．5.98×10 - 3D ．0.6×10 - 44．下图几何体（图1）的主视图是（ ）。
5．下面是一位美术爱好者利用网格图设计的几个英文字母的图形，你认为其中既是 轴称图形又是中心对称图形的是（ ）。
6．2009年331、35、31、34、30、32、31，这组数据的中位数、众数分别是（ ）。
A ．31，31B ．31，32 C ．32，31 D ．32，35 7．甲、乙两种商品原来的单价和为100元。
因市场变化，甲商品降价10%，乙商品提A ．价40%，调价后，两种商品的单价之和比原来的单价之和提高了20%。
求甲、乙两种商品原来的单价。
设甲商品原来的单价是x 元，乙商品原来的单价是y 元，根据题意可列方程组为（ ）。
2024学年广东省深圳市宝安区重点名校中考一模语文试题含解析
2024学年广东省深圳市宝安区重点名校中考一模语文试题考生须知：1．全卷分选择题和非选择题两部分，全部在答题纸上作答。
选择题必须用2B铅笔填涂；非选择题的答案必须用黑色字迹的钢笔或答字笔写在“答题纸”相应位置上。
2．请用黑色字迹的钢笔或答字笔在“答题纸”上先填写姓名和准考证号。
3．保持卡面清洁，不要折叠，不要弄破、弄皱，在草稿纸、试题卷上答题无效。
一、积累与运用1．下列各句中，加点成语使用不恰当的一项是（）A．“低头族”的注意力都集中在手中的方寸屏幕上，往往对身边的世界漠不关心．．．．。
殊不知，无论移动终端中的虚拟世界多么精彩，却无法替代现实世界的真实美好。
B．《流浪地球》公映10天就收获了30亿的票房佳绩，依照目前走势，《流浪地球》票房超过40亿指日可待．．．．。
C．他患有严重的胃病，日常饮食很受限制，不仅不能饮美酒，对面前的佳肴也只能浅尝辄止．．．．。
D．时间真如白驹过隙．．．．，当初迈进初中大门的那一刻仿佛就在昨天，转眼间，初中的学习生活就要结束，新的学习生活即将开始。
2．下列句子加点成语使用正确的一项是（）A．达州美术家画展在达州市图书馆开幕了，来自本市各区县的画家竞相观摩，艺术爱好者也趋之．．。
．．若鹜B．中心广场的各珠宝专卖店的柜子里，各种式样的名贵宝石俯拾即是．．．．，吸引了许多顾客。
C．贪官的蜕变大多是这样的：开始，人家送礼他都不收，时间长了，他就认为是小事一桩，犯不着太认真，也就不．以为然．．．了。
D．如果你们坚持与人民为敌的政策，一意孤行．．．．，制造事端，那么最后必然会被人民消灭。
3．下列句子中加点成语使用不正确的一项是( )A．两年前，世界大学生运动会就在这美轮美奂．．．．的建筑中上演了一部青春序曲。
B．茫茫人海中，能够与一个人萍水相逢．．．．，即便是擦肩而过，也是一种难得的缘分。
C．冰雪初融，江河日下．．．．，涓涓细流润泽万物，春天在人们不知不觉中悄然而至。
D．大型武术舞台剧《太极秀》融合声光电技术，场面极其壮观，令人叹为观止．．．．。