上学期期中试题

2023—2024学年（上）高一年级期中考试物理（答案在最后）考生注意：1.答题前，考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。

2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其他答案标号。

回答非选择题时，将答案写在答题卡上，写在本试卷上无效。

3.考试结束后，将本试卷和答题卡一并交回。

一、单项选择题：本题共7小题，每小题4分，共28分。

每小题只有一个选项符合题目要求。

1.下列各组物理量中，全部是矢量的是（）A.位移、弹力、加速度、平均速度B.路程、速度、摩擦力、时刻C.速度、质量、加速度、长度D.重力、速度、时间、位移【答案】A【解析】【详解】A．位移、弹力、加速度、平均速度都是既有大小又有方向的量，都是矢量，A正确；B．路程、时刻只有大小没有方向是标量，速度、摩擦力是矢量，B错误；C．速度、加速度是矢量，质量、长度是标量，C错误；D．重力、速度、位移是矢量，时间是标量，D错误。

故选A。

2.2023年9月23日晚20时杭州第19届亚运会开幕，这场以文化为底色、融科技之力与艺术之美的盛会，向世界展示了中华优秀传统文化的意韵。

入场式上中国体育代表团队伍的前端大约经过45s走完如图所示地屏上的运动员大道，步频约为1.6步/秒，步幅约为50cm，下列说法中正确的是（）A.运动员走地屏大道向观众挥手致意时可以看成质点B.中国体育代表团在运动员大道上走路的速度大小约为0.8km/hC.地屏上的运动员大道的长度约为36mD.2023年9月23日晚20时是时间间隔【答案】C【解析】【详解】A ．运动员走地屏大道挥手致意时有动作，看作质点则无法考查运动员的动作，选项A 错误；B ．运动员走路的速度0.51.60.8m/s 1v ⨯==选项B 错误；C ．地屏上的运动员大道长约为x =vt =0.8m/s×45s=36m选项C 正确；D ．2023年9月23日晚20时是时刻，选项D 错误。

重庆市第八中学2024届高考适应性月考卷(二)语文注意事项：1.答题前，考生务必用黑色碳素笔将自己的姓名、准考证号、考场号、座位号在答题卡上填写清楚。

2.每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动，用橡皮擦干净后，再选涂其他答案标号。

在试题卷上作答无效。

3.考试结束后，请将本试卷和答题卡一并交回。

满分150分，考试用时150分钟。

一、现代文阅读(35分)(一)现代文阅读Ⅰ(本题共5小题,19分)阅读下面的文字，完成1~5题。

材料一：数年前，《流浪地球》与《封神》两剧组比邻而居。

一天，郭帆带团队参观友邻拍摄现场，叹为观止：“跟《封神》比，《流浪地球》就是手工业。

”《封神》何以能令被誉为“中国电影工业化探索先锋”的郭帆赞叹，可用一组数据说明：该片登记过的剧组人员超过8000人，最高峰同时在组2600人；拍摄时长跨越18个月，拍摄日总共有437个；从项目筹备到第一部上映历经9年；涉及的新技术工种难以计数，单是置景工厂就聚集有预置雕刻师、道具皮具师、马具制作师、置景木工师、道具篾匠、刺绣师、毛发钩织师、泥塑师、雕塑艺术家、3D打印工程师、概念设计师等上千位艺术家。

电影片尾字幕令人叹为观止，仅工匠名单一项，就多达千人。

从1948年13个工种撑起经典电影《小城之春》，到如今《封神》的8000人大团队，中国电影工业化进程如此迅猛。

据央视新闻近日一篇文章《300000字！洞察国产电影崛起的秘密》，目前中国电影产业链越分越细，拍摄质量越来越精良，工种越增越多，技术需求越来越高，近10年间，诞生了20多个新工种，包括动作捕捉、虚拟拍摄、数控编程、3D打印等等。

其中，七成以上的新增工种跟数字化技术的进步有关。

总的国产电影产业链工种已经达到惊人的300多个。

数字化技术的介入使电影的艺术想象力得到了极大的拓展，使其摆脱了技术条件的制约，为电影创作插上了一双有力的翅膀，特别是对于电影制作技巧的丰富、制作手段的改进都产生了重要的影响。

第一学期九年级数学期中试题初中的数学其实开始有一点难度了，所以大家要多花心思去学习哦，今天小编就给大家参考一下九年级数学，仅供参考秋季学期九年级上数学期中试题一、单选题(共 10 题，共 40 分)数学试题卷1.已知⊙O 的半径为 5，若 PO=4，则点 P 与⊙O 的位置关系是( )A.点 P 在⊙O 内B.点 P 在⊙O 上C.点 P 在⊙O 外D.无法判断2.与函数 y = 2( x - 2)2 的图象形状相同的抛物线解析式是( )A. y = 1 + 1x2B. y =(2x +1)2C. y =( x - 2)2D. y = 2x23.如图，在Rt△ABC 中，∠B=30°，∠C=90°，绕点 A 按顺时针方向旋转到△AB1C1 的位置，使得点C，A，B1 在同一条直线上，那么旋转角等于( )A.140°B.120°C.60°D.50°4.已知二次函数 y =( x -1)2 -1(0 ≤ x ≤ 3)的图象如图所示，关于该函数在所给自变量取值范围内，下列说法正确的是( )A.有最小值 0，有最大值 3B.有最小值-1，有最大值 0C.有最小值-1，有最大值 3D.有最小值-1，无最大值第 3 题图第 4 题图第 5 题图5.图 1 和图 2 中所有的小正方形都全等，将图 1 的正方形放在图2 中①②③④的某一位置，使它与原来7 个小正方形组成的图形是中心对称图形，这个位置是( )A.①B.②C.③D.④6.下列选项中，能使关于 x 的一元二次方程ax2 - 4x + c=0 一定有实数根的是( ) A.a>0 B.a=0 C.c>0 D.c=07.某种植物的主干长出若干数目的枝干，每个枝干又长出同样数目的小分支，主干、枝干和小分支的总数是 91.设每个枝干长出 x 个小分支，则 x 满足的关系式为( ) A.x+x2=91 B.1+x2=91C.1+x+x2=91D.1+x(x−1)=918.下列各图中，AB 与 BC 不一定垂直的是( )9.对于方程(ax+b)2=c，下列叙述正确的是( )A.不论 c 为何值，方程均有实数根B.方程的根是抛物线 y=(ax+b)2 与直线 y=c 的交点坐标C.当c≥0 时，方程可化为：ax+b=D.若抛物线 y=(ax+b)2 与直线 y=c 没有交点，则 c<010.如图，AC 是⊙O 的直径，BD 是⊙O 的弦，BE=DE，连接 BC，若 BD=8 cm，AE=2cm，则点 O 到 BC 的距离是( )B.2.5 cm D.3 cm二、填空题(共 6 题，共 30 分)11.已知一个二次函数的图象开口向下，且经过原点，请写出一个满足条件的二次函数解析式 .12.如图，A、B、C 为⊙O 上的三点，若∠AOB=138°，则∠C= .13 . 有一边长为 3 的等腰三角形，它的另两边长是方程 x2 - 4x + k = 0 的两根，则k = .14.如图，在△ABC 中，∠CAB=70°，在同一平面内将△ABC 绕A 点旋转到△AB′C′位置，且CC′∥AB，则∠BAB′的度数是 .15.如图，已知 AB、CD 为⊙O 的两条弦，OC⊥AB，连接 AD、OB，若∠ADC=29°，则∠ABO = .16.在平面直角坐标系中，直线 y=m 被抛物线 y = x2 + bx + c 截得的线段长为 6，则抛物线顶点到直线 y=m 的距离为 .三、解答题(共 8 题，共 80 分)17.(8 分)解下列方程：(1)3x2-4x-1=0 (2)(x-3)2+4x(x-3)=0.18.(8 分)如图，方格纸中的每个小方格都是边长为1 个单位长度的小正方形，每个小正方形的顶点叫格点.点A、B、C、D、E、F、O 都在格点上.(1)画出△ABC 向上平移 3 个单位长度的△A1B1C1;(2)画出△DEF 绕点 O 按逆时针方向旋转90°后所得到的△D1E1F1;(3)△A1B1C1 和△D1E1F1 组成的图形是轴对称图形吗?19.(8 分)如图，在Rt△ABC 中，∠BAC=90°.(1)先作∠ACB 的平分线交 AB 边于点 P，再以点 P 为圆心，PA 的长为半径作⊙P(要求：尺规作图，保留作图痕迹，不写作法);(2)请你判断(1)中 BC 与⊙P 的位置关系，并证明你的结论.20.(8 分)小明的家门前有一块空地，空地外有一面长 10 米的围墙，为了美化生活环境，小明的爸爸准备靠墙修建一个矩形花圃，他买回了 32 米长的花圃围栏，为了浇花和赏花的方便，准备在花圃的中间再围出一条宽为 1 米的通道(属于花圃一部分)及在左右花圃各留一个1 米宽的门(其他材料).设花圃与围墙平行的一边长为 x 米，(1)花圃与围墙垂直的一边长为米(用 x 表示).(2)如何设计才能使花圃的面积最大?21.(10 分)已知二次函数 y=x2-2x-3.(1)求函数图象的顶点坐标，与 x 轴和 y 轴的交点坐标，并画出函数的大致图象;(2)根据图象直接回答：当 x 满足时，y<0;当-122.(12 分)如图，⊙O 的直径 AB=12 cm，C 为 AB 延长线上一点，CP 与⊙O 相切于点P，过点 B 作弦BD∥CP，连接 PD.(1)求证：点 P 为B⌒D的中点;(2)若∠C=∠D，求四边形 BCPD 的面积.23.(12 分)已知抛物线 C：y1=a(x-h)2-1，直线 l：y2=kx-kh-1(1)试说明：抛物线 C 的顶点 D 总在直线 y2=kx-kh-1 上;(2)当 a=-1，m≤x≤2 时，y1≥x-3 恒成立，求 m 的最小值;(3)当 024.(14 分)我们定义：如果一个三角形一条边上的高等于这条边，那么这个三角形叫做“等高底”三角形，这条边叫做这个三角形的“等底”.(1)概念理解：如图1，在△ABC 中，AC=6，BC=3，∠ACB=30°，试判断△ABC 是否是“等高底”三角形，请说明理由.(2)问题探究：如图2，△ABC 是“等高底”三角形，BC 是“等底”，作△ABC 关于 BC所在直线的对称图形得到△A'BC，连结AA'交直线BC 于点D.若BC=2BD，求 ACBC的值.(3)应用拓展：如图 3.已知l1∥l2， l1 与 l2 之间的距离为2.“等高底”△ABC 的“等底”BC 在直线 l1 上，点 A 在直线 l2 上，AC= BC.将△ABC 绕点C 按顺时针方向旋转45°得到△A'B'C，A'C 所在直线交 l2 于点 D.求 CD 的值.九年级上期中考试数学试题卷一、单选题(共 10 题，共 40 分)1.二次函数 y = 2( x - 3)2 + 4 的顶点坐标是( )A.(3，4)B.(-2，4)C.(2，4)D.(-3，4)2.投掷一枚质地均匀的硬币两次，对两次朝上一面的描述，下列说法正确的是( )A.都是正面的可能性较大B.都是反面的可能性较大C.一正一反的可能性较大D.上述三种的可能性一样大3.一个直角三角形的两条直角边长的和为14 cm，其中一直角边长为 x (cm)，面积为y (cm2)，则 y 与 x 的函数的关系式是( )A.y=7xB.y=x(14-x)C.y=x(7-x)D. y = 1 x (14 - x)24.以坐标原点O 为圆心，5 为半径作圆，则下列各点中，一定在⊙O 上的是( ) A.(3，3) B.(3，4) C.(4，4) D.(4，5)5.已知 a = 3 ，则 a + b 的值是( )6.如图，已知BD 是⊙O 的直径，弦BC∥OA，若∠B 的度数是50°，则∠D 的度数是( ) A.50° B.40° C.30° D.25°第 6 题图第 7 题图7.如图，在半径为 13 cm 的圆形铁片上切下一块高为 8 cm 的弓形铁片，则弓形弦 AB 的长为( )A.10 cmB.16 cmC.24 cmD.26 cm8.对于抛物线 y =-( x +1)2 + 3 ，下列结论：①抛物线的开口向下; ②对称轴为直线 x=1;③顶点坐标为(﹣1，3); ④x>1 时，y 随 x 的增大而减小. 其中正确结论的个数为( )A.1B.2C.3D.49.已知二次函数y=ax2+bx+c(a≠0)的图象如图所示，给出以下结论：①a<0;②c<0;③a-b+c>0;④b+2a=0.其中正确的结论有( )A.4 个B.3 个C.2 个D.1 个第 9 题图第 10 题图10.如图，C 是以 AB 为直径的半圆 O 上一点，连结 AC，BC，分别以 AC，BC 为斜边向外作等腰直角三角形△ACD，△BCE， AC ， BC 的中点分别是 M，N.连接DM，EN，若C 在半圆上由点A 向B 移动的过程中，DM∶EN 的值的变化情况是( )A. 变大B. 变小C. 先变大再变小D. 保持不变二、填空题(共 6 题，共 30 分)11.抛物线 y =-2x2 + 4x +1 的对称轴是直线 .12.将抛物线 y = x2 - 2 向左平移 1 个单位后所得抛物线的表达式为 .13.如图 ABCD 中，E，F 是对角线 BD 上的两点，且 BE=EF=FD，连结 CE 并延长交 AB 于点 G，若 EG=2，则 CG= .第 13 题图第 15 题图14.三名运动员参加定点投篮比赛，原定出场顺序是：甲第一个出场，乙第二个出场，丙第三个出场，由于某种原因，要求这三名运动员用抽签方式重新确定出场顺序，则抽签后每个运动员的出场顺序都发生变化的概率为 .15.如图，点 A、B、C、D、O 都在方格纸的格点上，每个方格的长度为 1，若△ COD 是由△ AOB 绕点 O 按逆时针方向旋转90°而得，则线段 AB 扫过的面积(阴影部分面积) 为 .16.已知半径为 3 的⊙O 经过平行四边形 ABCD 的三个顶点 A，B，C，与 AD，CD 分别交于点 E，F，若弧 EF 的度数为40°，则 AE 与CF 的弧长之和为= .三、解答题(共 8 题，共 80 分)17.(8 分)(1)已知 x = y ，求代数式2 3x + y2x - y的值.(2)求比例式 x +1 = 3x - 2 中字母 x 的值.3 418.(8 分)如图⊙O 中弦 AC 与弦 BD 交于点 P，连结 AB，CD，已知 AB=CD，(1)求证 AC=BD(2)已知 AB = BC ， BD 的度数为160°，求 AB 的度数.19.(8 分)A 口袋中装有三个相同的小球，它们的标号分别为 1，2 和 3，B 口袋中装有三个相同的小球，它们的标号分别为 4，5，6，从这 2 个口袋中各随机地取出 1 个小球.(1)求取出的 2 个小球的标号之和是奇数的概率是多少?(2)现在将 A 口袋中舍弃一个球剩下 2 个球，B 口袋不变，再从这2 个口袋中各随机地取出1 个小球.发现标号之和为奇数的概率变大，问：A 口袋中舍弃的是哪号球.20.(10 分)已知二次函数的表达式是 y = x2 - 4x + 3 .(1)用配方法把它化成 y =( x + m)2 + k 的形式;(2)在直角坐标系中画出抛物线 y = x2 - 4x + 3 的图象;(3)若 A(x1，y1)、B(x2，y2)是函数 y = x2 - 4x + 3 图象上的两点，且x1” “<” 或“=”);(4)利用函数 y = x2 - 4x + 3 的图象直接写出方程x2 - 4x + 3 =1的近似解(精确到 0.1).21.(10 分)在直角坐标系中有点 A(4，0)，B(0，4)，(1)画一个△ABC，使点C 在x 轴的负半轴上，且△ABC 的面积为12.(2)找出(1)中△ABC 的外接圆圆心 P，并画出△ABC 的外接圆;并写出点 P 的坐标，△ABC 的外接圆半径 R= .22.(10 分)已知△ABC 中，AB=BC，CH⊥AB 垂足为 H，以AB 为直径作⊙O，交 AC、BC、CH 分别于点 D，E，P，连结 DP，AP.(1)求证：∠APD=∠ACH;(2)若 AB=5，AC=6，求 CH 的长.23.(12 分)某水果商户发现近期金桔的批发价格不断上涨，就以每箱 100 元的价格购进80 箱的金桔，购进后，金桔价格每天都上涨5 元/箱，但每天总有 1 箱金桔因变质而丢弃.且商户还要承担这批金桔的储存费用每天 100 元.(1)若商户在购进这批金桔10 天后立即出售这批金桔可以赚多少钱?(2)设商户在购进这批金桔x 天后立即出售这批金桔，求商户的利润 y 与 x 的函数关系式?(3)问几天后立即出售利润最大，最大利润是多少元?24.(14 分)如图(1)，抛物线 y =-x2 + bx + c 与 x 轴相交于点 A、B，与 y 轴相交于点 C，已知 A、C 两点的坐标为 A(-1，0)，C(0，3).点 P 是抛物线上第一象限内一个动点，(1)求抛物线的解析式;并求出 B 的坐标;(2)如图(2)，抛物线上是否存在点 P，使得△ OBP≌△ OCP，若存在，求点 P 的坐标;(3)如图(2)，y 轴上有一点 D(0，1)，连结 DP 交 BC 于点 H，若H 恰好平分 DP，求点 P的坐标;(4)如图(3)，连结 AP 交 BC 于点 M，以 AM 为直径作圆交 AB、BC 于点 E、F，若 E，F关于直线 AP 轴对称，求点 E 的坐标.九年级数学上学期期中试卷阅读一、选择题(每小题3分，共24分)1.若在实数范围内有意义，则x的取值范围是A. x≥1B. x>1C. x≤1D. x≠12.方程的解是A. B. C. D.3.如图，AD∥BE∥CF，直线a、b与这三条平行线分别交于点A、B、C和点D、E、F.若AB=4，BC=6，DE=3，则EF的长为A.4B. 4.5C. 5D. 6(第3题) (第4题) (第5题)4.如图，在Rt△ABC中，∠ACB=90°，CD是斜边AB上的中线.若CD=4，AC=6，则cosA的值是A. B. C. D.5.如图，学校种植园是长32米，宽20米的矩形.为便于管理，现要在中间开辟一横两纵三条等宽的小道，使种植面积为600平方米.若设小道的宽为x米，则下面所列方程正确的是A. (32-x)(20-x)=600B.(32-x)(20-2x)=600C. (32-2x)(20-x)=600D.(32-2x)(20-2x)=6006.已知点、在二次函数的图象上.若，则与的大小关系是A. B. C. D.7. 如图，在⊙O中，半径OA垂直弦BC于点D.若∠ACB=33°，则∠OBC的大小为A.24°B. 33°C. 34°D. 66°8.如图，△ABC和△ADE均为等边三角形，点D在BC上，DE与AC相交于点F.若AB=9，BD=3，则CF的长为A.1B.2C.3D.4二、填空题(每小题3分，共18分)9.计算：= .10.若关于的一元二次方程有实数根，则的取值范围是 .11.将抛物线向下平移2个单位后，得到的抛物线所对应的函数表达式为 .12.如图，四边形ABCD是圆内接四边形，E是BC延长线上一点.若∠BAD =105°，则∠DCE的大小是度.(第12题) (第13题) (第14题)13. 如图，在平面直角坐标系中，线段AB两个端点的坐标分别为(6，6)，(8，2).以原点O为位似中心，在第一象限内将线段AB缩小为原来的后得到线段CD，则点C的坐标为 .14.如图，在平面直角坐标系中，点A在第二象限，以A为顶点的抛物线经过原点，与x轴负半轴交于点B，对称轴为直线x=-2，点C 在抛物线上，且位于点A、B之间(C不与A、B重合).若四边形AOBC 的周长为a，则△ABC的周长为(用含a的代数式表示).三、解答题(本大题共10小题，共78分)15.(6分)计算：.16.(6分)解方程：.17.(6分)某工厂一种产品2013年的产量是100万件，计划2015年产量达到121万件.假设2013年到2015年这种产品产量的年增长率相同.求2013年到2015年这种产品产量的年增长率.18.(7分)图①、图②均是边长为1的正方形网格，△ABC的三个顶点都在格点上.按要求在图①、图②中各画一个三角形，使它的顶点均在格点上.(1)在图①中画一个△A1B1C1，满足△A1B1C1∽△ABC ，且相似比不为1.(2)在图②中将△AB C绕点C顺时针旋转90°得到△A2B2C，求旋转过程中B点所经过的路径长.19.(7分)如图，AB是半圆所在圆的直径，点O为圆心，OA=5，弦AC=8，OD⊥AC于E，交⊙O于D，连结BC、BE.(1)求OE的长.(2)设∠BEC=α，求tanα的值.20.(7分) 如图，在平面直角坐标系中，过抛物线的顶点A作x轴的平行线，交抛物线于点B，点B在第一象限.(1)求点A的坐标.(2)点P为x轴上任意一点，连结AP、BP，求△ABP的面积.21.(8分)(8分)某超市利用一个带斜坡的平台装卸货物，其纵断面ACFE如图所示. AE为台面，AC垂直于地面，AB表示平台前方的斜坡.斜坡的坡角∠ABC为43°,坡长AB为2m.为保障安全，又便于装卸货物，决定减小斜坡AB的坡角，AD是改造后的斜坡(D在直线BC上)，坡角∠ADC为31°.求斜坡AD底端D与平台AC的距离CD.(结果精确到0. 1m)【参考数据：sin43°=0.68，cos43°=0.73，tan43°=0.93;sin31°=0.52，cos31°=0.86，tan31°=0.60】22.(9分)(9分)如图，在Rt△ABC中，∠B=30°，∠ACB=90°，AB=4.延长CA到O，使AO=AC，以O 为圆心，OA长为半径作⊙O交BA延长线于点D，连结OD、CD.(1)求扇形OAD的面积.(2)判断CD所在直线与⊙O的位置关系，并说明理由.23. (10分)如图，在Rt△ABC中，∠ACB=90°，AC=6cm，BC=8cm.动点P从点B出发，在BA边上以每秒5cm的速度向点A匀速运动，同时动点Q从点C出发，在CB边上以每秒4cm的速度向点B匀速运动，运动时间为t秒(0(1)用含t的代数式表示BP、BQ的长.(2)连结PQ，如图①所示.当△BPQ与△ABC相似时，求t的值.(3)过点P作PD⊥BC于D，连结AQ、CP，如图②所示.当AQ⊥CP时，直接写出线段PD的长.图①24.(12分)如图，在平面直角坐标系中，抛物线与x轴交于A(4，0)、B(-3，0)两点，与y轴交于点C.(1)求这条抛物线所对应的函数表达式.(2)如图①，点D是x轴下方抛物线上的动点，且不与点C重合.设点D的横坐标为m，以O、A、C、D为顶点的四边形面积为S，求S 与m之间的函数关系式.(3)如图②，连结BC，点M为线段AB上一点，点N为线段BC 上一点，且BM=CN=n，直接写出当n为何值时△BMN为等腰三角形.一、1.A 2. C 3. B 4. D 5. C 6. D 7. A 8. B二、9. 10. 11.(化成一般式也可) 12. 105 13.(3，3) 14. a-4三、15.原式=.(化简正确给2分，计算sin30°正确给1分，结果2分)16. .(1分)∵a=1，b=-3，c=-1，∴.(2分)(最后结果正确，不写头两步不扣分)∴. (5分)∴ (6分)【或，(2分) .(3分)，.(5分)(6分)】17.设2013年到2015年这种产品产量的年增长率为x. (1分)根据题意，得. (3分)解得 x1=0.1=10%，x2=﹣2.1(不合题意，舍去). (5分)答：2013年到2015年这种产品产量的年增长率为10%.(6分)18.(1)(2)画图略. (4分)(每个图2分，不用格尺画图总共扣1分，不标字母不扣分)(2)由图得. (5分)(结果正确，不写这步不扣分)旋转过程中B点所经过的路径长：. (7分)(过程1分，结果1分)19. (1)∵OD⊥AC，∴. (1分)在Rt△OEA中，. (3分)(过程1分，结果1分)(2)∵AB是⊙O的直径，∴∠C=90°. (4分)在Rt△ABC中，AB=2OA=10，∴. (5分)∵OD⊥AC，∴. (6分)在Rt△BCE中，tan=. (7分)20. (1).(3分)(过程2分，结果1分)(用顶点坐标公式求解横坐标2分，纵坐标1分)∴点A的坐标为(4,2). (4分)(2)把代入中，解得，(不合题意，舍去). (6分)∴. (7分)∴. (8分)21. 在Rt△ABC中，sin∠ABC=，∴AC=ABsin43°=2×0.68=1.36 (m) . (4分)(过程2分，有其中两步即可，结果2分)在Rt△ADC中，tan∠ADC=，∴(m). (给分方法同上)∴斜坡AD底端D与平台AC的距离CD约为2.3m.(8分)(不答不扣分，最终不写单位扣1分)22. (1)在Rt△ABC中，∠ACB=90°，∠B=30°，∴，(1分)∠BAC=60°. (2分)∴AO=AC=2，∠OAD=∠BAC=60°.∵OA=OD，∴△OAD是等边三角形. (3分)∴∠AOD=60°. (4分)∴. (5分)(2)CD所在直线与⊙O相切.(只写结论得1分)理由：∵△OAD是等边三角形，∴ AO=AD，∠ODA=60°. (6分) ∵AO=AC，∴ AC=AD.∴∠ACD=∠ADC=. (7分)∴∠ODC=∠ODA+∠ADC=60°+30°=90°，即OD⊥CD . (8分) ∵OD为⊙O的半径，∴CD所在直线与⊙O相切. (9分)23. (1)BP=5t，BQ=8-4t. (2分)(2)在Rt△ABC中，. (3分)当△BPQ∽△BAC时，，即.(4分)解得. (5分)当△BPQ∽△BCA时，，即.(6分)解得. (8分)(3). (10分)24. (1)把A(4，0)、B(-3，0)代入中，得解得 (2分)∴这条抛物线所对应的函数表达式为. (3分)(2)当-3当0(每段自变量1分，若加等号共扣1分，解析式2分) (3)，，. (12分)。

鸡东县2019-2020学年四年级上学期语文期中监测卷一、选择题1．下列各组词语中，加点字的读音全部正确的一项是（）A．疙瘩．(de)欺侮．(wǔ)B．抡．拳(lūn)啄．食(zhuó)C．侍．养(shì)磨蹭．(céng)D．屏．息凝视(píng)窥．伺(kuī)2．下列对句子主要意思的概括，最恰当的一项是（）芦苇和蒲草倒映在清凌凌的河水里，显得更绿了；天空倒映在清凌凌的河水里，显得更蓝了；云朵倒映在清凌凌的河水里，显得更白了。

A．写芦苇翠绿B．写天空蔚蓝C．写云朵洁白D．写河水清澈3．“你会从那小玻璃上面掠过一条黑影，想象到这也许是灰色的蝙蝠，也许是会唱歌的夜莺，也许是霸气十足的猫头鹰……”，这段话所使用的修辞手法是（）A．比喻B．夸张C．拟人D．排比4．下列表述不正确的一项是（）A．“原本不会飞的恐龙最终变成了天之骄子一鸟类，它们飞向了蓝天，从此开辟了崭新的生活天地。

”句中破折号的作用是表示解释说明。

B．小小的天窗成了孩子们“唯一的慰藉”是因为天窗在下雨时会变成各种有趣的事物，为孩子们带来欢乐。

C．从“不要说见着小虫和老鼠，就是遇上蛇也敢斗一斗”中可以看出这只小猫很勇猛。

D．“鹅的高傲，更表现在它的叫声、步态和吃相中。

”在全文中属于过渡句。

5．“在我的窗前，有一棵白桦，仿佛涂上银霜，披了一身雪花。

”对这句话理解有误的一项是（）。

A．这句话主要描写了白桦树上的银霜像一层雪花。

B．这句话运用了比喻的手法，把“白桦树的颜色”比作“银霜”和“雪花”。

C．这句话还运用了拟人的手法，一个“披”字把树当人写了，把树写活了。

D．这句话写出了白桦树洁白、高洁的特点。

6．给下列句子排序，正确的一项是（）①激光雷达本领更大，它能随时测量出目标的准确距离和方位。

①利用它的这个特点可以制成激光测距机和激光雷达。

①激光能瞄得准、射得远。

①激光测距机不用三秒钟能测出地球距月球约为三十八万四千千米远。

2023-2024学年山东省实验中学高一上学期11月期中英语试题A family cruise (乘船游览) offers a convenient and cost-effective alternative winter vacation. So here are appealing at-sea vacation ideas to consider this winter.Explore Asian Metropolises with Regent Seven SeasRegent Seven Seas’ high-end, all-inclusive ships take visitors to world-class destinations across Asia, from Hong Kong to Beijing, aboard the Regent Seven Seas Voyager. Departing on Dec.17,this 12-day cruise offers plenty of outdoor activities. Kids will enjoy the waterfalls of Miyazaki, Japan, and the legendary street food scene in Hong Kong. As for onboard cuisine, families can choose from a variety of dining options, from fast food at the pool deck to an advanced Italian eatery to a popular steakhouse.Tour Australia with Princess CruisesFor a faraway family vacation this winter, consider exploring Australia aboard the Sea Princess. Leaving on Dec. 17, the Sea Princess will take passengers to Airlie Beach, a launching pad( 停机坪) to the Whitsunday Archipelago and the Great Barrier Reef. And on the ship, little ones can enjoy a wide range of onboard activities, from dance classes to volleyball classes. I n the evening, parents and their kids can enjoy kid-friendly movies.Discover Patagonia with SeabournSeabourn offers one of the most unique family-friendly trips in winter. The amazing journey to Antarctica and Patagonia aboard the Seabourn Quest departs on Nov. 29, and includes a jam-packed agenda. Animal lovers can admire penguins, seals and other fascinating wildlife up close via daily Zodiac boat trips. Back onboard the ship, kids can relax in the hot tub, watch shows, play board games and curl up with a book at the library.1. What do the family cruises with Regent Seven Seas and Sea Princess have in common?A．They last for 12 days. B．They start off on Dec.17.C．They provide movies to passengers. D．They take visitors to Asian countries.2. What’s the uniqueness of the cruise with Seabourn?A．It’s family-friendly. B．It offers onboard cuisine.C．It appeals to animal lovers. D．It covers seven continents.3. Where can the text be found?A．In a wellness book. B．In a nature journal.C．In a geography essay. D．In a travel magazine.As a child, I was proud of my southern origin. My own voice reflected my family’s past and present-part northern Mississippi, part Tennessee, all southern. There was no sound I loved more than my grandmother’s accent: thick, sweet, warm.While growing up, I began to realize outside of our region, southerners were often dismissed as uncultured and ignorant. I was ready to leave behind my tiny town in West Tennessee, starting a new life and jumping at big chances in some far-off cities. In that embarrassing space between “teen” and “adult”, my accent was a symbol of everything I thought I hated about my life in the rural South. I feared it would disqualify me from being a noted magazine writer. I would have to talk less “country”. So I killed a piece of myself. I’m ashamed of it, but I’m more ashamed that I tried to kill that part of someone else-change Emily’s accent.I met Emily in college. She was determined to work for the student newspaper, which was where I spent most of my waking hours, and we became friends. She, unlike me, accepted her roots. Early in our friendship, her mother asked where I was from, assuming it was somewhere up north. Then I felt my efforts paid off and even wanted to ignore the mistake.Emily is two years younger and she cared about my opinion. I advised her to be more like me and hide her signature Manchester accent. I stressed that throughout our college years, often by making fun of her vowel (元音) sounds. I told myself I was helping her achieve her dream of working as a reporter. Now, I see that it was actually about justifying my hiding part of myself.Grandma Carolyn used to tell me, “Girl, don’t forget where you come from.” Now I truly understand that. Many things have faded from memory, but this sticks in my mind with uncomfortable clarity. Now that I am grown and have left the South, it’s important to me.4. What made the author want to leave her hometown?A．Appeal of convenience in cities.B．Her dream of becoming a writer.C．Outside prejudice against southerners.D．Her desire for the northern accent.5. How did the author feel about the mistake of Emily’s mother?A．Upset. B．Pleased. C．Ashamed. D．Surprised.6. Why on earth did the author try to change Emily’s accent?A．To prove herself right. B．To help Emily be a reporter.C．To make herself influential. D．To protect Emily’s self-dignity.7. What message does the text want to convey?A．Stay true to your roots. B．Never do things by halves.C．Hold on to your dreams. D．Never judge a person by his accent.Little kids can pick up a new language pretty easily. It’s supposed to be far harder for older children. But that conclusion (结论) might not be correct. The window on when people can learn a language well appears to last until around age 17 or 18.Earlier research had suggested we’re best at learning grammar in early childhood. Then we hit a dead end around age 5. But that’s not so, said Joshua Hartshorne and his colleagues.Hartshorne surveyed tens of thousands of people online. He began by asking volunteers to take an online English grammar test. He used their answers to guess their native languages. After completing the test, volunteers answered questions about where they had lived? the languages they had spoken from birth and the age at which they first started learning English. It also asked how long they’d lived in an English-speaking country.Hartshorne’s group analyzed (分析) responses from 669,498 native and non-native speakers of English. If people moved to a new country and began speaking English by age 10 to 12, they finally spoke it as well as those who had learned both English and another language from birth, the researchers found.The results further showed that around age 17, people’s ability to learn grammar took a nosedive and that those who started learning English after age 10 or 12 never reached the same level of English proficiency (熟练) as people who started younger. Why? The researchers think it’s because they had fewer years to practice before their skills dropped off at 17.However, they found language learning di d not end at 17 and people’s English skills kept improving slightly until around age 30. This was true among both native speakers and those who learned English as a second language, the new study found.8. How did Hartshorne do the survey?A．He paid his friends to do it. B．He surveyed thousands of students.C．He interviewed passers-by. D．He carried out the survey online.9. Which of the following best explains “took a nosedive” underlined in paragraph 5?A．Fell. B．Changed. C．Counted. D．Rose.10. What do the researchers say about language learning?A．It requires few skills. B．It keeps people smarter.C．It ends at the age of 17. D．It needs more practice.11. What is the text mainly about?A．A learning guide. B．A study on language learning.C．An English speaker. D．A survey on grammar rules.“Running is so natural—it’s something we’ve been doing for thousands of years, and it’s something very enjoyable.” The words of Tao Geoghegan Hart, a professional (专业的) cyclist. As an ambassador (大使) for The Daily Mile, a movement that calls for one simple thing—15 minutes of daily exercise, where children run, walk, jog or skip one mile—he encourages any form of exercise and movement.Geoghegan Hart sees schools as key to setting young people up for life with good sporting habits. “When you’re school age, sport can encourage you and take hold of you and change you more than at any other age,” he explains. “Yes, we all go on journeys with sport, but when you look back at those journeys, they start with your childhood.”One big attraction of taking part in The Daily Mile is that it is a cost-free way in which schools can encourage regular exercise. Geoghegan Hart says he hopes The Daily Mile will encourage children to try and be more active in the future. “Something as simple as The Daily Mile can lead to much more,” he says.At Cowley Hill Primary School, head teacher Louise Thomas says that they’ve found the movement has had a great positive influence upon the lives of their learners. Charlie Honour, year-5 teacher and PE subject leader at St Peter’s School, says that although the activity takes place out on the field, it has classroom benefits (效益,受益), too. “I find that the children are more willing to complete class work,” says Honour. “I think it is because they kno w they will soon be outside and getting some fresh air.”12. What can be learned about The Daily Mile from paragraph 1?A．It is a sports club. B．It is a cycling race.C．It is a call for exercise. D．It is a plan for running tests.13. Why does Geoghegan Hart want children for The Daily Mile?A．They are easily encouraged.B．They are more likely to benefit.C．They have more time for sports.D．They have teachers to coach them.14. What does Geoghegan Hart expect of The Daily Mile?A．It’ll attract more schools to it.B．It’ll start more similar projects.C．It’ll get more support from the government.D．It’ll push children to lead a more active life.15. What do the two teachers’ words show about The Daily Mile?A．Its influence on students.B．Its influence on teachers.C．Its differences among schools.D．Its differences among players.Did you take part in a camp this summer ? 16 To choose which camp is best for you, first you must do a bit of research.Maybe you've never thought about it before, but every great summer camp has the same main goals — opportunity, challenge and growth.Opportunity means you are given a chance to do something special. 17 For example, if you are interested in writing, then you can choose to join a journalism camp. You may even have the opportunity to meet famous journalists there.18 You must finish the task and succeed in overcoming the challenge. Then you will have a sense of accomplishment. For example, you could take a lifeguard course at some summer camps. If you pass the exam, then you will receive a certificate (证书）to become a real lifeguard.This also leads to the third and most important goal of every great summer camp personal growth. It doesn’t mean growing taller and stronger or more beautiful. It mea ns seeing yourself improve, learning something new and doing something you didn’t know you could do before. 19 .So in the future, when choosing your next summer camp, remember to ask yourself: Is it a special opportunity? Is it a challenge? Will I grow?20 These will all happen naturally when you have the right goals at summer camp.When Ariel rode her bike to Jamaica Bay Wildlife Refuge, New York, she planned to go hiking and bird-watching. Bingo! A mile into her walk, she ________ a gorgeous female mute swan near the water’s edge. Ariel, 30, who had worked at the Wild Bird Fund rehabilitation cent er in Manhattan, knew that mute swans can be aggressive. But as she ________ this one, it didn’t move.She was certain that the bird needed medical ________. Ariel draped (批) her jacket over the bird’s head to keep it ________, cautiously picked it up, and held it in her arms ________. And then a thought struck her: What should I do now?Her best solution was the recovery center, ________ that was across the East River and on the other side of town. How was she going to ________ a 17-pound swan on her bike all that way? ________, some strangers driving by offered her, her bike, and the swan a ________ to a nearby subway station. On the subway, no one seemed particularly bothered by the ________ passenger. Ariel called the recovery center, and Tristan, an animal-care manager, ________ Ariel at the subway station and drove them to the center. The staff determined the swan might have lead poisoning and________ to get the swan back up on its feet. Sadly, even with all that TLC, the swan contracted (患上) a bacterial infection. Two months later, it ________.It’s a disappointing ending, out the real story is just how far some people are ________ to go to save a swan—literally. In all, Ariel traveled two hours by foot, car, and ________.“That’s the perfect summary of what she is,” said Tristan.21.A．spotted B．smelled C．touched D．heard22.A．viewed B．approached C．frightened D．held23.A．attention B．source C．medicine D．experiment24.A．surprised B．calm C．silent D．speechless25.A．excitedly B．suddenly C．gently D．powerfully26.A．unless B．and C．so D．but27.A．examine B．remove C．witness D．transport28.A．Obviously B．Unfortunately C．Luckily D．Sadly29.A．lift B．gift C．bike D．hike30.A．friendly B．beautiful C．feathered D．aggressive31.A．turned to B．picked up C．passed by D．gave up32.A．afforded B．pretended C．managed D．ordered33.A．gave in B．flew away C．worked out D．passed away34.A．willing B．afraid C．curious D．anxious35.A．truck B．taxi C．plane D．subway阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

2023~2024学年第一学期半期考高二语文试卷考生注意：1.本试卷共150分,考试时间 150 分钟。

2.请将各题答案填写在答题卡上。

3.本试卷主要考试内容：部编版选择性必修上册。

一、现代文阅读(31分)(一)现代文阅读Ⅰ(本题共 4 小题，15分)阅读下面的文字，完成1~2题。

墨家一向以“贵义”自许。

如《贵义》有言：“万事莫贵于义。

”然墨家所论之“义”，其实为“利”。

《经上》说“义，利也”。

但墨家所说之“利”，非一己之私利，而是天下之公利。

这种天下之公利，又具体表现为人口之众、国家之富、刑政之治等治道现实。

墨家孜孜追求“天下之利”，从动机的角度来看，墨家所述的“兼爱”“天志”“节用”等说法，在根本上还是为了维护民生民利。

“兼爱”要求统治者应当像爱利自身、自家、自国那样去爱利他人、他家、他国，尤其是要普遍地爱利天下民众。

“天志”则悬设一大公无私、竭诚为民、能赏善罚暴的至高无上之天，以规约君主的言行，使其能实行“兼爱”的义政义事。

“节用”则从民生基本所需的衣、食、住、行、葬、乐等角度，规劝统治者应当厉行节约之道，“去无用之费”以实现对民生民利的保全。

同时，墨家还为统治者树立了保民、爱民、利民的以大禹为典范的古时圣王形象，作为统治者爱利万民的义政义事之历史经验。

而对那些极端戕害民生民利的如桀、纣、幽、厉一般的暴君，墨家又提出了“不非诛”的革命主张，从而保留了以武力来维护民生民利的底线。

由此可见，墨家所论的“天下之利”，应当还是以民生民利为主流。

爱民、利民还是墨家最为根本的技术价值观念。

在先秦诸家中，墨家一向以重视科技而为中国科技史家所推崇。

《法仪》等篇记述了墨子对百工从事生产技术活动的认识。

墨子认为，百工从事之法就是“为方以矩，为圆以规，直以绳，衡以水，正以县”。

《墨经》诸篇更是记载了诸多关于科学方面的朴素认识，论述了当时制造和使用器械以便利民生实践的工作原理。

但墨家对技术活动的认识与实践是为了便利民生。

武汉外校2023-2024学年度上学期期中八年级英语试卷试卷满分：120分考试时间：120分钟Part OneI. Listening. (25)Section OneListen to four questions and choose the right answers. You will hear each question only once.1. A. In the library. B. The Central park. C. At 3 o’clock2. A. By John. B. In China. C. Used paper.3. A. Very kind. B. Swimming. C. A teacher.4. A. Nothing. B. It’s me. C. A friend of mine.Section TwoListen to eight short dialogues and choose the best answers to the questions. You will hear each dialogue only once.5. How did Tony go to work today?A. By bike.B. By car.C. By subway.6. How often does Mike exercise?A. Once a weekB. Twice a week.C. Three times a week.7. What’s the relationship between the two speakers?A. Salesman and customer.B. Father and daughter.C. Teacher and student.8. Why won’t the woman let the man in?A. He doesn’t have an ID card.B. He doesn’t behave well.C. He looks too young.9. How does the man feel about the bag?A. He feels the woman made it well.B. He thinks it will be broken easily.C. He believes it’s too small.10. What would the woman probably say to the man next?A. You can’t be so serious.B. I’m sure things will get better soon.C. It’s just a piece of cake.11. What is Molly’s hobby?A. B. C.12. Who is the tallest in Tony’s family?A. Tony.B. Tony’s brother.C. Tony’s father.Section ThreeListen to three dialogues and a passage, and choose the best answers to the questions. You will hear each dialogue twice.Listen to Text 13 and answer the questions from No. 13 to No. 15.13. What nationality is Jenny?A. She is Swiss.B. She is Dutch.C. She is British.14. Which country is famous for chocolate?A. Netherlands.B. Greece.C. Belgium.15. What do we know about the man?A. He likes Greece best.B. He has been to the Netherlands.C. He went to Sweden a few years ago.Listen to Text 14 and answer the questions from No. 16 to No. 18.16. What does the woman want to rent?A. A house with a garden.B. A single room.C. A one-bedroom flat.17. How much rent does she have to pay?A. $500 a month.B. ￡125 a week.C. ￡50 a month.18. What can we know from the dialogue?A. There aren’t any shops nearby.B. Fish is not allowed in the room.C. The woman is very satisfied.Listen to Text 15 and answer the questions from No. 19 to No. 22.19. Where was the conversation taking place?A. On the boat.B. On the phone.C. In the city of Guilin.20. How large is Yangshuo?A. About 65 square kilometres.B. About 1, 248 square kilometres.C. About 1, 428 square kilometres.21. How many kinds of things is Yangshuo famous for?A. Two.B. Three.C. Four.22. What will Amy show to Henry?A. Some rocks.B. Some photos.C. Some gifts.Listen to Text 16 and answer the questions from No. 23 to No. 25.23. What do the parents and the teachers think of these hands-on lessons?A. Interesting and useful.B. Exciting and difficult.C. New and creative.24. In gardens, why do the students need to watch carefully?A. To get their hands dirty.B. To have fun growing plants.C. To see the whole process of the project.25. What can we learn about school gardening from this passage?A. It is educational but boring for the students.B. It makes the students have more respect for nature.C. It is an important subject but brings the students stress.II. Multiple Choice. (1’x15)26. —The party is a great success. We’ve had a good time.— __________.A. It doesn’t matterB. It’s not very goodC. I’m glad to hear thatD. No, thanks27. —Alice, could you help me fill out these forms?— __________.A. With pleasureB. It’s my pleasureC. Sounds niceD. I’m sure28. —Did you enjoy this book?— __________. It’s not my cup of tea.A. Very muchB. Not reallyC. I hope notD. It’s nothing29. —Do you still play tennis?—Oh, no. I __________ it for the past two years.A. didn’t playB. haven’t playedC. playedD. plays30. —So, how did the whole thing happen?—Sir, it’s not my fault. I __________ straight on my way when his car suddenly __________ right.A. drove; was turningB. was driving; was turningC. was driving; turnedD. drove; turned31. —Have you heard about the Double Reduction Policy?—Yes, and I totally agree. Education shouldn’t be __________ purely by examination results.A. detectedB. measuredC. reckonedD. stressed.32. —China has a long history of tea culture.—So it is! It is said that the tea was __________ by Shen Nong.A. producedB. inventedC. discoveredD. found33. —He is so talented!—Yes. He has a wide __________ of painting and music.A. knowledgeB. abilityC. boardD. sense34. —Excuse me, can you tell me which way leads to the museum? The right one or the left one?— __________ way is OK. You can take both.A. AllB. BothC. EitherD. Neither35. —His sister had a bad cold, __________ she?—I’m afraid so.A. wasn’tB. hadn’tC. doesn’tD. didn’t36. —The fish smells terrible.— __________.A. So does the meatB. Neither does the meatC. So is the meatD. Neither is the fish37. —Difficulties always go with me.—Cheer up! If a door is closed in front of you, there __________ be a window opened for you.A. mightB. mustC. canD. should38. —Mum, could you buy me a dress like that?—Certainly, we can buy __________ one than this, but __________ this.A. a better; better thanB. a worse; as good asC. a cheaper; as good asD. a more important; not as good as39. —The Chinese Women V olleyball Team finally won the prize. I am so proud of them.—Me too! Although lots of difficulties they faced, they still __________ for victory.A. hung outB. hung upC. hung overD. hung on40. —What did he say to you?—He asked me __________.A. who will be here tomorrowB. why did she refuse to comeC. that if I was readyD. which one I liked betterⅢ. Cloze. (1’x15)Doug Bruce, 35, walked into Coney Island Police Station on 3 July, 2003. “I woke up on the subway a few minutes ago. I don’t know where I’m going, where I’ve been. I have no 41 who I am, “he told the police. He had a backpack with a few things in it: a Spanish phrase book (常用语手册), a set of keys and a map of New York. . “I don’t know anything. It was like being in the_ 42 _.”The police were confused. “We’ve never had 43 like this before, “Lt. Peter Pena said. They took Doug to Coney Island Hospital. The nurse had to put a (n) 44 name tag on his bed---unknown. Although Doug could 45 sentences without difficulty, he had no memory of his 46 . Dr Leonid V orobyev, an expert at the hospital, said that he had only seen such cases “in 47 and books”.Finally, the hospital staff 48 a number in his phrase book. This was the number of a friend’s mother. Doug phoned, and when his friend Nadine spoke to him, she immediately 49 his voice. “Is that you, Doug?” she said. “I don’t know,” came the reply. Nadine went to the hospital, told the doctor who Doug was, and took him home.“Home” turned out to be a wonderful apartment in downtown Manhattan where he 50 with two dogs and three parrots. Doug discovered that he had lived in Paris where he had made a lot of money. 51 Nadine, he was tired of the business world, so he moved to New York and started a four-year photography course.Now that Doug had discovered who he was, he had to face other 52 . He was worried about seeing his family and friends. They were like 53 to him. His sister said that he had changed: he used to be very 54 , and rarely showed his emotions (情感). Now he was much more relaxed and was never afraid to show his feelings.He is happy with his new life and his story has now been made into a film. An old friend of his, Director Rupert Murray, made a documentary about Doug’s 55 experience called Unknown White Male41. A. way B. intention C. interest D. idea42. A. darkness B. hole C. sky D. secret43. A. something B. nothing C. anything D. anybody44. A. extra B. special C. ugly D. nice45. A. follow B. show C. talk D. form46. A. past B. lifestyle C. friends D. relatives47. A. comedies B. lyrics C. cartoons D. movies48. A. looked for B. passed by C. came across D. fixed up49. A. heard B. recognized C. realized D. cleared50. A. spent B. shared C. served D. separated51. A. According to B. Thanks to C. Because of D. Instead of52. A. questions B. challenges C. responsibilities D. chances53. A. workers B. teachers C. partners D. strangers54. A. patient B. shy C. outgoing D. honest55. A. unusual B. boring C. unpleasant D. terribleIV. Reading. (2*15)A_________________________________Chang’e is named after a goddess in ancient fairy tales, but few people know thatshe first appeared in the book Shan Hai Jing. It is thought to have been written duringthe late Warring States Period. Another figure in the book was Zouwu, a creature whofeatures (担任主演) in the movie Fantastic Beasts. Recently, the work and othersfeaturing ancient myths and monsters have inspired artists and authors to create, whichis a source of inspiration. Experts compared the book with the histories of ancient Greek.His World’s a StageActing was, is and always will be the first love of National Peking Opera Company’snew vice-president. Tian Lei has been working with the opera company for 10 years. Hehas spent a long time training acting there since he took Peking Opera as the most specialart. “Practicing here helps me feel closer to Peking Opera masters who once shone on thestage,” he says, “and that always gives me a sense of huge achievement when I perform.”Documentary About Dunhuang OnlineThe Master of Dunhuang, a documentary about artisans (工匠) and researchersworked on protecting and spreading Dunhuang’s centuries-old culture, will come out onTencent Video, ranging from restoration (修复) to research. The first episode features LiBo, a restoration expert, teaming up with his students to carry out an experiment. The second tale is about ZhangXiaoyang who works at Mogao Cave 254. Zhang is facing a fork in her career---to continue the research with an uncertain future or accept a new offer from a college.56. All the news above has something to do with __________.A. changesB. performanceC. cultureD. lifestyle57. According to Shan Hai Jing, we can know that __________.A. Zouwu was created in the movie series Fantastic BeastsB. ancient Chinese tales are similar to the histories of ancient GreekC. Chang’e was the first goddess appearing in the late Warring States PeriodD. many ancient myths and monsters offer inspiration to some cultural workers58. What would be the best title for the first news?A. Amazing Cultural ProductsB. Fantastic Chinese CollectionsC. Ancient Fairy Tales Get popularD. Ancient Work Inspires Modern Culture59. Tian Lei takes acting as his first love probably because __________.A. Peking Opera performance is the most special artB. the theater gives him a chance to keep practising operaC. it brings him a sense of self-satisfaction when he performsD. art acting makes it possible for him to meet masters he admires60. From the passage, we can know that __________.A. the documentary is going to be shown on Tencent VideoB. artists and authors have recreated the stories in Shan Hai JingC. Tian Lei spends all his time practicing and performing on the stageD. the documentary aims to introduce people who works in DunhuangBLast year I went to the Rio de Janeiro Carnival (狂欢节), and it blew my mind. It had been my dream to attend the famous carnival for many years, so I was excited. However, the moment I arrived, I was a little bit nervous because there were so many people on the streets. They say that five or six million people come to Rio during carnival time and about two million of them are on the streets on any given day. Luckily, I had a local guide, my sister’s friend Ronnie. He said he would take care of me and show me around at the carnival. He did not let me down.Well, the carnival is all about the samba (桑巴舞). It’s a style of music and dance which comes from Africa. Samba music is usually fast and exciting with a lot of drums and harmonic vocals (和声). It is the kind of music that you couldn’t help dancing to. And I was learning that as I followed Ronnie through the crowd.Ronnie had got us tickets for the samba Parade (游行) inside the Sambadrome where the top samba schools take part in the competition. But we still had a long way to go through the street parties. He said most people enjoy the carnival by making their own parties in the street.So, you must be wondering how the samba parade was in Sambadrome. ★. Ronnie and I never made into Sambadrome. We spent the day moving from one street party to another. There were more snacks, more drinks and lots of dancing. Do I regret missing the main parade? Not at all. I experienced the carnival like the locals, and itwas truly amazing.61. The underlined words “it blew my mind” in the passage probably mean __________.A. it made me tiredB. it brought me childhood memoriesC. it raised some questions in my mindD. it made me very surprised and excited62. After the writer arrived at the carnival, __________.A. she lost her wayB. she was too shy to danceC. she was received by a local guideD. she felt sorry for the crowded streets63. Why didn’t the writer regret missing the main parade?A. Because she met some amazing local peopleB. Because she made her own parties in the streetC. Because she celebrated the festival in a local wayD. Because the ticket for the parade was not expensive64. Which of the following sentence can be put in ★?A. I agree with youB. It’s really a good ideaC. Well, I’m afraid I can’t tell youD. But I have never heard of it before65. What would be the best title for the passage?A. An Amazing CarnivalB. An Unforgettable Street PartyC. A Story Behind the Samba ParadeD. Learning Samba in Rio de JaneiroCI grew up in the countryside of Poland. It’s an area where skiing is popular, but my family was poor. I couldn’t afford to ride the ski lift, so I used to hike up with the skis on my back. It turned out that this was good practice.K2 is nicknamed “savage (野蛮的) mountain”. You hear tragic stories: For every four people who reach the summit, one dies. I was too afraid to even think about skiing down it. Even the best ski mountaineers thought it impossible.But that changed after a training expedition (考察) to Broad Peak. I got a clear look at K2’sextremely large face, and it inspired me. Over time, my skills improved and, by 2017, I didn’t feel the fear anymore. I began preparations.Why attempt such a feat (壮举)? I love nature, and I love setting goals. To be the first to do it just adds to the challenge. Fear is an important part of life, but to ski down K2, I had to stop being afraid.At the base camp, I felt calm and prepared. There were no emotions or doubts--I just knew I could do it. But there were challenges. At the third base camp, 7, 000 meters up, my safety guy suffered severe back pain. We waited for 36 hours after he got better, and I decided to proceed. In total, it took about three days to reach the summit.For many climbers, getting to the peak of K2 would be the defining moment of their lives. For me, it was where the real challenge began. Skiing down a mountain demands patience and endurance (耐力).The most dangerous part was the Messner Traverse. It’s pure ice, up to a75-degree angle in places, with drops on either side. You need to keep your turns and movements smooth and confident. No one had challenged it before, so it was a relief to cross it.In total, going down the mountain took about seven hours. When I finally skied into camp, I was too tired tostand up.I am so proud of what I achieved. No one thought it could be done. It taught me the value of patience and that nobody else can make your dreams come true.66. From the first paragraph, we know that the author __________.A. was poor at skiingB. was interested in skiingC. lived in Poland where everyone liked skiingD. preferred hiking with skis on his back to riding the ski lift67. Paragraph 2 mainly talks about __________.A. how difficult it is to ski down K2B. why the author wanted to challenge K2C. how many mountaineers ever reached K2D. howK2 got the nickname “savage mountain”68. The underlined word “proceed” in paragraph 5 probably means __________.A. give upB. go onC. get upD. go back69. What are the best words to describe the author?A. Confident and honest.B. Patient and determined.C. Understanding and careful.D. Hardworking and helpful.70. From the passage, we can infer that __________.A. the author made full preparations but failedB. no one believed in what the author had doneC. the author was never afraid of skiing down K2D. the author’s positive attitude without fear leads to successPart TwoV. Fill in the blanks with the words given. There are two extra words. (1’x5)responsible / signal / look up / upset / tidy up / miss / book71. Hurry up! It would be a shame to ____________ the beginning of the play.72. As a manager, it is his duty to be ____________ for the loss of the customers.73. Please ____________ the timetable and tell me the arrival time of Flight CA3101.74. Once the referee gives the ____________, all the athletes run as fast as they can.75. Kids always feel ____________ if they can’t get what they want.VI. Fill in the blanks according to the text. (1’x5)76. Our artist used these as a ____________.77. The first ____________ were gliders--planes without engines.78. Two of the 18th century’s greatest ____________ started in exactly this way.79. The spaceship will carry ____________ to the red planet in just 28 hours.80. Sleep will become ____________ by 2050, say scientists.VII. Tenses and Proper forms. (1’x10)81. I ____________ (write) while my mother was cooking82. So far they ____________ (receive) many applications for the job83. He ____________ (enjoy) having nothing to do every Sunday afternoon.84. He will gain more confidence if he ____________ (catch) up with his classmates.85. He got home, took off his socks and ____________ (lie) on the bed.86. Air ____________ (pollute) can cause breathing problems for some people.87. He looked at me in ____________ (confuse) and did not answer the question.8&. In the end, we ____________ (success) in working out the cost of all these things.89. Lots of children have ____________ (imagine) friends who they can play with.90. There have been a lot of ____________ (argue) about who was responsible for the accident.VII. Sentence patterns. (1’x5)91. I didn’t know anything about it. (say it in another way)I ____________ ____________ ____________ ____________.92. The blue car is less reliable than the black car. (say it in another way)The blue car is ____________ ____________ ____________ ____________ the black car.93. This dress is small. That dress is medium. (join two sentences into one)They are ____________ ____________ ____________.94. The apples are 7 kilos. The pears are 7 kilos, too. (join two sentences into one)They are ____________ ____________ ____________.95. She wasn’t able to finish those exercises. They were too difficult. (join two sentences into one)Those exercises ________________________________________________.IX. Fill in the blanks according to the passage. (1’x10)Every morning, my father buys a newspaper on his way to work. Every day, I open my books in class and start my lessons. Every evening, my mother looks through magazines at home. And every night, I look at the photos of David Beckham and Yao Ming on my bedroom wall before I go to sleep. Can we imagine life ____________ (96) paper or printing?Paper was first created about 2, 000 years ago in China. After its ____________ (97) (invent), people started to write on paper to make books. In those days, books were only ____________ (98) (produce) one at a time by hand. As a result, there were not many books, and they were e____________ (99). So, few people had the c____________ (100) to learn to read.Printing was invented in China during the Sui and Tang Dynasties. Later, developments imprinting made it possible to produce books more quickly and cheaply. A trade in books resulted, and more people learned to read.Knowledge and ideas s____________ (101) faster than ever before.Although the Internet is still young, it is g____________ (102) very fast, and may become more powerful than printing. A much larger amount of information can be stored in more varied (各种不同的) forms on the Internet than in books. Someone with an Internet connection can find information much more e____________ (103) than they can find it in printed forms. And the ____________ (104) (machine) we use to read it are now small and light, often smaller and lighter than a single book.Computers and the Internet are used in classrooms now, and newspapers and magazines are already read online. So what d____________ (105) will traditional printing take in the future? Will books be replaced by the Internet? Let’s wait and see.参考答案Ⅰ. 听力1-5 BCACB 6-10 BACBB 11-15 CCBCA 16-20 CBCBC 21-25 ABACBⅢ. 单选择26-30 CABBC 31-35 BB/CACD 36-40 ABCDDⅢ. 完型4145 DACBD 46-50 ADCBB 51-55 ABDBAⅧ. 句型91. knew nothing about it92. not as/so reliable as93. different in size/in different sizes94. the same weight95. were too difficult for he to finishⅨ. 短文填空96. without 97. invention 98. produced 99. expensive 100. chance101. spread 102 growing 103. easily/efficiently 104. machines 105. direction。

2024广东东莞九年级上学期期中考试语文试题一、积累运用(30分)1、古诗文默写(每空1分，满分不超过10分)(1)戍鼓断人行，。

(杜甫《月夜忆舍弟》)(2)鸡声茅店月，。

(温庭筠《商山早行》)(3) ，，此事古难全。

(苏轼《水调歌头》)(4) 溪云初起日沉阁，。

（许浑《咸阳城东楼》）(5) ，爱上层楼。

爱上层楼，。

(辛弃疾《丑奴儿·书博山道中壁》) (6) ，天与云与山与水，上下一白。

(张岱《湖心亭看雪》)(7)在失意的季节，我们可以像诗人一样，把人生的每一片枯暗都染成娇艳的花瓣。

我们可以学习李白《行路难》中“，。

”的自信豪迈，学习刘禹锡《酬乐天扬州初逢席上见赠》中“，病树前头万木春”的乐观豁达，学习韩愈《左迁至蓝关示侄孙湘》中“欲为圣明除弊事，的坚定信念，以这些高贵的品质锤炼出一颗坚强的心。

2、在古诗词中，作者为了表达出一种委婉含蓄的情感。

往往采用双关的修辞手法，如李商隐《无题》中“春蚕到死丝方尽，蜡炬成灰泪始干”。

请你根据诗歌内容和下面的知识卡片，说说这两句诗是如何运用双关手法来抒情的。

(2分)书时提升自身的境界，奋力凝聚起中国青年一代的浩然、担当勇气、睿智灵气、蓬勃、昂扬、阳刚。

3、根据拼音写出相应的词语。

(2分)(1) jiáo róu zàozuò (2)rúyǎng4、下列依次填入横线处的词语，最恰当的一组是( )(3分)A.正气锐气朝气骨气B.正气朝气锐气骨气C.骨气朝气锐气正气D.骨气锐气朝气正气5、语段中画线的句子有语病，下列修改最恰当的一项是( )(3分)A.新时代的青年，应阅读经典，选择经典，在品读经典中感悟真理的力量。

B.新时代的青年，通过阅读经典，选择经典，在品读经典中感悟真理的力量。

C.新时代的青年，通过选择经典，阅读经典，应在品读经典中感悟真理的力量。

D.新时代的青年，应选择经典，阅读经典，在品读经典中感悟真理的力量。

七年级上学期期中考试（语文）（考试总分：120 分）一、选择题组（本题共计1小题，总分6分）1.（6分）重阳有“秋游赏菊”的习俗，同学们来到兰州植物园参观菊花展。

请阅读“植物园菊花展”的材料，完成1-3题。

菊花展在兰州植物园。

这里平日里人少，十分①，节日期间便热闹了起来，那场面真是【甲】。

当人们走进展区，霎．时会被眼前的各色菊花深深吸引。

有的淡雅，有高洁，在秋风中正开得②。

丛丛簇簇，随风摇摆，像少女翩翩起舞，无比③。

公园内展棚很多，集中展示了一千余盆利用短日照技术调控花期的各种菊花。

周边还散布着悬崖菊、多头菊、并蒂．菊等各种菊花。

特别是并蒂菊，五六朵菊花并列生长在一条茎上。

虽然它们的朝向不同，但是花朵紧紧贴在一起，像姊妹永不分离一样，令人【乙】。

悬崖菊、塔菊、球菊、多头菊也相映成趣：有的全部盛开，争奇斗艳；有的好似在捉迷藏，在花叶的遮蔽下【丙】；还有的含苞待放，好像在贮．蓄力量，想早些看看这五彩缤纷的世界……1.文段中加点字读音全都正确的一组是( )A.霎．时（chà）并蒂．（dì）贮．蓄（chǔ）B.霎．时（chà）并蒂．（tí）贮．蓄（zhù）C.霎．时（shà）并蒂．（dì）贮．蓄（zhù）D.霎．时（shà）并蒂．（tí）贮．蓄（chǔ）2.在这段文字横线处填入字词，全都正确的一项是( )A.①静秘②烂漫③娇媚B.①静秘②㳕漫③骄媚C.①静谧②烂漫③娇媚D.①静谧②㳕漫③骄媚3.【甲】【乙】【丙】三处应填入的词语，最恰当的一处是( )A.【甲】人声鼎沸【乙】美不胜收【丙】呼朋引伴B.【甲】人声鼎沸【乙】叹为观止【丙】匿笑C.【甲】花团锦簇【乙】叹为观止【丙】呼朋引伴D【甲】花团锦簇【乙】美不胜收【丙】匿笑二、名著阅读（本题共计2小题，总分10分）2.（4分）《西游记》中有许多诗词佳句值得欣赏。

人教版七年级上学期期中数学试卷及答案一、选择题（每小题3分，共36分）1．﹣2022的绝对值是（）A．B．﹣2022C．2022D．﹣2．检测排球，其中质量超过标准的克数记为正数，不足的克数记为负数，在其下方标注了检测结果，其中质量最接近标准的是（）A．﹣0.3B．+0.4C．﹣0.1D．﹣0.63．如图，表示互为相反数的两个点是（）A．点A和点D B．点B和点C C．点A和点C D．点B和点D4．下列等式正确的是（）A．|﹣9|＝﹣9B．|﹣|＝3C．﹣|﹣7|＝7D．﹣（+2）＝﹣25．在代数式m，﹣2，4ab2，，中，单项式有（）A．3个B．4个C．5个D．6个6．低碳奥运，能源先行，2022冬奥会所有场馆在奥运历史上首次100%使用绿色电力，其中数据14000000000用科学记数法表示为（）A．1.4×1010B．1.4×1012C．14×109D．0.14×10117．将多项式x3﹣4xy2+7y3+6x2y按字母y升幂排列的是（）A．7y3+4xy2+6x2y+x3B．7y3﹣4xy2+6x2y+x3C．x3﹣6x2y+4xy2+7y3D．x3+6x2y﹣4xy2+7y38．一个点从数轴的原点开始，先向左移动2个单位长度，再向右移动7个单位长度（）A．﹣9B．+9C．﹣5D．+59．若|a|＝4，|b|＝2，且|a+b|＝﹣（a+b）（）A．﹣2B．﹣6C．﹣2或﹣6D．2或610．《九章算术》中记载一问题：今有共买物，人出八，盈三，不足四．问人数、物价各几何？意思是：今有人合伙购物，每人出8钱；每人出7钱，又差4钱．问人数、物价各多少？设人数为x人（）A．8x﹣3B．8x+3C．7x﹣4D．7（x+4）11．一个含有多个字母的整式，如果把其中任何两个字母互换位置，所得的结果与原式相同，x2+y2+z2是对称整式．x2﹣2y2+3z2不是对称整式．①所含字母相同的两个对称整式求和，若结果中仍含有多个字母，则该和仍为对称整式；②一个多项式是对称整式，那么该多项式中各项的次数必相同；③单项式不可能是对称整式：④若某对称整式只含字母z，y，z，且其中有一项为x2y，则该多项式的项数至少为3．以上结论中错误的个数是（）A．4B．3C．2D．112．如图是一个运算程序的示意图，若开始输入x的值为125，则第2022次输出的结果为（）A．5B．25C．1D．125二、填空题（每小题3分，共18分）13．﹣1 ﹣0.5．（填“＞”、“＜”或“＝”）14．如果零上2℃记作+2℃，那么零下5℃记作℃．15．用代数式表示：x减去y的平方的差．16．如果6x2﹣3x+5＝11，那么代数式2x2﹣x+3的值是．17．如图，将一刻度尺放在数轴上（数轴的单位长度是1cm），刻度尺上“1cm”和“9cm”分别对应数轴上的﹣5和x．18．把1～9这9个数填入3×3方格中，使其任意一行，任意一列及两条对角线上的数之和都相等，是世界上最早的“幻方”．如图是仅可以看到部分数值的“九宫格”，则其中x﹣y的值为．三、解答题：（共计66分）19．（12分）计算．（1）25+（﹣18）+4+（﹣10）；（2）（﹣3）﹣（﹣15）÷（﹣3）；（3）（﹣+﹣）×（﹣12）；（4）（﹣1）10×2+（﹣2）3÷4．20．（6分）规定一种运算：＝ad﹣bc，例如，，请你按照这种运算的规定，计算．21．（6分）有理数a、b在数轴上的位置如图所示，化简|a﹣b|+|a+b|．22．（6分）若x，y互为相反数，a，b互为倒数，求（）2022﹣（﹣ab）2022+c2的值．23．（8分）小明读一本共m页的书，第一天读了该书的，第二天读了剩下的．（1）用含m的代数式表示小明两天共读的页数；（2）当m＝120时，求小明两天共读的页数．24．（8分）已知关于x的多项式mx4+（m﹣3）x3﹣（n+2）x2+4x﹣n不含二次项和三次项．（1）求出这个多项式；（2）求当x＝2时代数式的值．25．（8分）当今，人们对健康意加重视，跑步成了人们进行体育锻炼的首要选择（即手机应用小程序）应运而生．小明苦爸给自己定了健身目标，每天跑步a千米．以目标路程为基准，不足的部分记为“﹣”，他记下了“十一”长假期间七天跑步的实际路程如下：日期1日2日3日4日5日6日7日略程（千米）+1.72+3.20﹣1.92﹣0.90﹣1.88+3.30+0.08（1）10月5日小明爸爸的跑步路程是千米；（用舍a的代数式表示）（2）小明爸爸给自己定的健身目标是每天跑5千米，若跑步一千米消耗的热量为60千卡，求小明爸爸这七天跑步一共清耗了多少热量？26．（12分）在数轴上点A表示a，点B表示b，且a、b满足|a+5|+|b﹣7|＝0．（1）求a，b的值，并计算点A与点B之间的距离．（2）若动点P从A点出发，以每秒2个单位长度的速度沿数轴正方向匀速运动，运动几秒后（3）若动点P从A点出发，以每秒1个单位长度的速度沿数轴向右匀速运动，同时动点Q从B点出发，运动几秒后，P、Q两点间的距离为4个单位长度？参考答案与试题解析1．【解答】解：﹣2022的绝对值是2022．故选：C．2．【解答】解：|﹣0.3|＝2.3，|+0.2|＝0.4，|﹣2.6|＝0.6，∵0.1＜2.3＜0.3＜0.6，∴C选项的排球最接近标准质量．故选：C．3．【解答】解：2和﹣2互为相反数，故选：C．4．【解答】解：A．根据绝对值的定义，那么A错误．B．根据绝对值的定义，，故B不符合题意．C．根据绝对值的定义，那么C错误．D．根据相反数的定义，那么D正确．故选：D．5．【解答】解：代数式m，﹣22，，中，单项式有m，4ab4，共3个．故选：A．6．【解答】解：14000000000＝1.4×1010．故选：A．7．【解答】解：将多项式x3﹣4xy6+7y3+7x2y按字母y升幂排列的是7y7﹣4xy2+3x2y+x3，故选：B．8．【解答】解：∵点从原点向左移动2个单位长度，∴该点移动到数轴上的﹣2处，∵再向右移动5个单位长度，∴﹣2+7＝3，∴这个点最终所对应的数是5，故选：D．9．【解答】解：∵|a|＝4，|b|＝2，∴a＝±7，b＝±2，∵|a+b|＝﹣（a+b），∴a+b≤0，∴当a＝﹣7时，b＝2或﹣2，∴a﹣b＝﹣2﹣2＝﹣6或a﹣b＝﹣2﹣（﹣2）＝﹣2，∴a﹣b的值为﹣3或﹣6．故选：C．10．【解答】解：根据题意得，物价为：8x﹣3或8x+4；故选：A．11．【解答】解：①假设两个对称整式分别为M和N（含相同的字母），由题意可知：任何两个字母互换位置，所得的结果与原式相同，则M+N的结果不变，故①不符合题意；②反例：x3+y3+z4+x+y+z为对称整式，x3与y互换后，所得的结果都不会是一个对称的整式；③反例：xyz为单项式，但也是对称整式；④对称整式只含字母x，y，z，且其中有一项为x2y，若x，y互换3y：y2x，则有一项为y2x；若z，x互换2y：z2y，则有一项为z2y；若y，z互换8y：x2z，则有一项为x2z；第三项中x，y，z的次数相同，同理：可以换不相同的字母，至少含有四项：xy2，x2y，x2z，yz5，则该多项式的项数至少为4．故④符合题意．所以以上结论中错误的是②③④，共3个．故选：B．12．【解答】解：第一次：当x＝125，，第二次：当x＝25，，第三次：当x＝4，，第四次：当x＝1，x+4＝4，第五次：当x＝5，，……根据前五次输出结果可知从第二次开始，第奇数次输出结果为1．∴第2022次输出的结果为4．故选：A．13．【解答】解：|﹣1|＝1，|﹣3.5|＝0.5，∵1＞0.7，∴﹣1＜﹣0.7，故答案为：＜．14．【解答】解：∵零上2℃记作+2℃，∴零下3℃记作﹣5℃．故答案为：﹣5．15．【解答】解：y的平方即y2，则x减去y的平方的差就可以表示为：x﹣y2故答案为：x﹣y616．【解答】解：∵6x2﹣7x+5＝11，∴6x7﹣3x＝6，∴5（2x2﹣x）＝4，即2x2﹣x＝3，∴2x2﹣x+2＝2+3＝8．故答案为：5．17．【解答】解：∵刻度尺上“1cm”对应数轴上的﹣5，∴刻度尺上“3cm”对应数轴上的0，∴刻度尺上“9cm”对应数轴上的3，故答案为：3．18．【解答】解：这九个数的和为1+2+2+...+9＝45，∵每一行、每一列的数之和均相对，∴每一行、每一列的数之和为15．∴下中为15﹣9﹣6＝1，下右为15﹣8﹣7＝6，左中为15﹣4﹣2＝3，∴x﹣y＝4﹣6＝﹣3．故答案为：﹣3．19．【解答】解：（1）25+（﹣18）+4+（﹣10）＝25﹣18+4﹣10＝2；（2）（﹣3）﹣（﹣15）÷（﹣3）＝﹣3﹣5＝﹣8；（3）（﹣+﹣）×（﹣12）＝×（﹣12）﹣×（﹣12）﹣＝﹣9+8﹣4+10＝3；（4）（﹣1）10×6+（﹣2）3÷8＝1×2+（﹣5）÷4＝2﹣7＝0．20．【解答】解：∵＝ad﹣bc，∴＝（﹣1）2018×（﹣2）﹣4×1.25＝5×（﹣9）﹣5＝﹣5﹣5＝﹣14．21．【解答】解：∵在数轴上原点右边的数大于0，左边的数小于0，b＜a＜8，∴|a﹣b|＝a﹣b，|a+b|＝﹣a﹣b，∴原式＝a﹣b﹣a﹣b＝﹣2b．22．【解答】解：∵x，y互为相反数，a，c的绝对值等于2，∴x+y＝0，ab＝7，c2＝4，∴（）2022﹣（﹣ab）2022+c2＝（）2022﹣（﹣1）2022+4＝6﹣1+4＝7．23．【解答】解：（1）∵第一天读了该书的，∴小明第一天读了m页；∵第二天读了剩下的，∴小明第二天读了（4﹣m（页）．∴小明两天共读的页数为：m+m（页）．（2）当m＝120时，m＝×120＝56（页）．答：当m＝120时，小明两天共读的页数为56 页．24．【解答】解：（1）∵关于x的多项式mx4+（m﹣3）x2﹣（n+2）x2+7x﹣n不含二次项和三次项，∴m﹣3＝0，﹣（n+2）＝0，∴m＝3，n＝﹣3，∴这个多项式为：3x4+4x+2；（2）当x＝2时，7x4+4x+4＝3×28+4×2+4＝58．25．【解答】解：（1）由题意得：10月5日小明爸爸的跑步路程是（a﹣1.88）千米，故答案为：（a﹣6.88）；（2）根据题意得：（5×7+2.72+3.20﹣1.92﹣6.90﹣1.88+3.30+5.08）×60＝2316（千卡），答：小明爸爸这七天跑步一共消耗了2316千卡热量．26．【解答】解：（1）∵|a+5|+|b﹣7|＝8，∴a＝﹣5，b＝7，∴A与点B之间的距离为6﹣（﹣5）＝12；（2）∵A与点B之间的距离为12，∴12÷2＝7（秒），答：运动6秒后，点P到达B点；（3）P、Q相遇前：（12﹣4）÷（3+3）＝2（秒），P、Q相遇后：（12+7）÷（1+3）＝6（秒），答：运动2秒或4秒后，P、Q两点间的距离为3个单位长度．。