广东省深圳市深圳实验学校中学部2020-2021学年度第一学期期中考试 七年级语文
广东省深圳市福田区深圳实验学校中学部2024-2025学年七年级上学期期中地理试卷(无答案)
中学部2024-2025学年第一学期阶段检测七年级地理试卷考试时间：60分钟试卷满分：100分说明：请考生在答题卷指定区域按要求规范作答，考试结束上交答题卷。
第Ⅰ卷一、选择题：（每题1.5分，50小题，共75分）1．“风调雨顺，五谷丰登”这句话反映了（）A．地理对日常生活的影响 B．地理对交通出行的影响C．地理对农业生产的影响 D．地理对工业生产的影响2．“气象经济”近几年成为热门话题。
下列天气与生产、生活搭配合适的是（）A．大雨——晾晒衣服 B．晴天——外出春游C．沙尘暴——户外活动 D．雷雨——高空作业读某社区平面图，完成下面小题。
3．要判断图中方向，我们应该使用（）A．指向标定向法 B．一般定向法 C．经纬网定向法 D．指南针定向法4．图中小学位于医院的（）A．西北方 B．东北方 C．正南方 D．西南方5．“商业区”是地图基本语言中的（）。
A．比例尺 B．指向标 C．图例 D．方向武汉的佳佳同学乘坐京广高铁到长沙游玩。
据此完成下面小题。
6．在比例尺为1:15000000的地图上，武汉到长沙的图上距离为2厘米，那么武汉到长沙的实地距离为（）A．200千米 B．300千米 C．300厘米 D．400千米7．下列图例中，表示铁路的是（）A． B． C．D．8．佳佳到长沙后，为方便游玩，最宜选用（）A．长沙市交通图 B．长沙市发展规划图 C．长沙市政区图 D．长沙市导游图小明在省外读书，开学季爸爸开车送他去机场。
出发前，小明用手机软件查看路况。
下图是小明查阅的电子地图截图，据图完成下面小题。
9．关于手机软件“智能推荐”的三条线路的说法，正确的是（（）A．方案一用时最少 B．方案二路程最短 C．方案三用时最长 D．方案二红绿灯最多10．经比较小明决定选择方案一，但是该线路有拥堵路段。
小明想知道拥堵路段的具体信息，他放大地图，手机地图发生的变化是（）A．图幅（手机页面）变大 B．显示范围扩大 C．比例尺变小 D．显示内容更详细11．小明感到电子地图比传统地图有很多优势，以下不是电子地图具备的优势是（）A．查询更方便 B．路线规划更精准 C．路况实时更新 D．无电状态也能使用下图为太阳系示意图，其中心是能够发光、发热的太阳，围绕太阳公转的有八大行星。
人教版数学七年级上册第一学期期中模拟测试试卷[部分含答案]共3份
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深圳实验学校中学部2020-2021 学年度第一学期阶段检测数学试卷（无答案）时间:90 分钟满分:100 分第Ⅰ卷一、选择题（每题2 分，12 小题，共24 分）1． 3 的相反数是（）A ． -3B ．- 13C ． 13D ．32．圆柱是由长方形绕着它的一边所在直线旋转一周所得到的,那么下列如图是一下四个图中的哪一个绕着直线旋转一周得到的（）3．如图,数轴上 A 、B 、C 三点表示的数分别为 a 、b 、c ，则它们的大小关系是（ ）A ． a > b > cB ． b > c > aC ．c > a > bD ． b > a > c4．用一个平面去截：①圆锥；②圆柱；③球；④五棱柱，能得到截面是圆的图形是（）A ．①②④B ．①②③C ．②③④D ．①③④5．下列说法正确的个数是（）①一个有理数不是整数就是分数；②一个有理数不是正数就是负数；③一个整数不是正的就是负的；④一个分数不是正的，就是负的． A ．1B ．2C ．3D ．46．下列运算中正确的是（）A ． 3.58 - (-1.58) = 3.58 + (-1.58) = 2B ． (-2.6) - (-4) = 2.6 + 4 = 6.67．设 a 为最小的正整数，b 是最大的负整数，c 是绝对值最小的数，则 a +b +c =（）A．1 B．0 C．1 或0D．2 或08．一个矩形的周长为30，若矩形的一边长用字母x表示，则此矩形的面积为（）A．x(15 -x) B．x(30 -x) C．x(30 - 2x) D．x(15 +x)9．某企业今年 3 月份产值为a 万元，4 月份比 3 月份减少了10% ，5 月份比 4 月份增加了15% ，则 5 月份的产值是（）A．(a - 10%)(a + 15%)万元B．(1 -10%)(1 +15%)a万元C．(a - 10% + 15%)万元D．(1 - 10% + 15%)a万元10．小明用纸（如图）这成了一个正方体的盒子，里面装了一瓶墨水，与其他空盒子混放在一起，只凭观察外形图案，选出墨水在哪个盒子中（）11．一只跳蚤在数轴上从原点开始，第1次向右条2个单位长度，第2次向左条4个单位长度，第3次向右跳6个单位长度，第4次向左跳8个单位长度，……依此规律跳下去，当它第2019 次落下时，落点表示的数是（）A．2019 B．2020 C．-2020D．101012．按下面的程序计算：若输入x = 100 ，输出结果是 501，若输出x= 25 ，输出结果是 631，若开始输入的x值为正整数，最后输出的结果为531，则开始输入的x值可能有（）A．1 种B．2 种C．3 种D．4 种第Ⅱ卷二、填空题（每题 2 分，10 小题，共 20 分）13．港珠澳大桥是世界上最长的跨海大桥，其中主体工程“海中桥隧”长达 35.578 公里，整个大桥造价超过 720 亿元人民币，720 亿用科学计数法可表示为 元．14．一个正方体的每个面上都有一个汉字，其平面展开图如图所示，那么该正方体中与“爱”字相对的是．15．比较大小： - 1110-10（填“＜”、“＞”或“．916．用一个平面去截正方体（，下列关于截面（截出的面）形状的结论：①可能是锐角三角形；②可能是钝角三角形；③可能是长方形；④可能是梯形．其中正确结论的是（填．17．若数轴上表示互为相反数的两点之间的距离是 16，则这两个数是 ．18．如图示一些小正方体木块所搭的几何体，从正面和从左面看到的图形，则搭建该几何体最多需要 块正方体木块．19．若“方框” 表示运算 x - y + z + w ，则“方框” 的运算结果是= ．20．单项式-2ab 的系数是m ，多项式 a 2b + 2ab - 3 的次数是n ，则m + n =．321．已知：21 = 2 ，22 = 4 ，23 = 8 ，24 = 16 ，25 = 32 ，26 = 64 ，27 = 128 ，2256 ，…，则 22020 的个 位数是．22. 已知有理数a ，b 满足ab ＜0，a +b ＞0，7a +2b +1＝﹣|b ﹣a |，则的值为 ．三、解答题（6 小题，共 56 分）23．计算（共6 小题，每小题4 分，共24 分）（6 分）如图，在宽为30 米，长为48 米的长方形地面上，修筑宽度为x米的两条互相垂直的小路，余下的部分作为草地．现给两条小路铺上地砖，选用地砖的价格是每平米a 元．（1）买地砖需要多少元？（用含a，x的式子表示）；（2）当a = 50 ，x = 3 时，计算地砖的费用．（6 分）从正面、左面、上面观察如图所示的几何体，分别画出你所看到的平面图形．（6 分）国庆节前，盐排高速公路养护小组，乘车沿东西向公路巡视维护，如果规定向东为正，向西为负，当天行驶记录如下（单位：千米）+18 ，- 9 ，+ 7 ，- 14 ，+ 6 ，+ 15 ，- 6 ，- 8（1）养护小组最后到达的地方在出发点的哪个方向？距出发点多远？（2）养护过程中，最远处离出发点有多远？（3）若汽车耗油量为 0.05 升/千米，则这次养护共耗油多少升？（6 分）若a、b互为相反数，c、d互为倒数，m的绝对值为2．（1）直接写出a +b ，cd ，m 的值；（2）求m +cd +a +b的值；m（3）若ab =c -d ，直接写出a ，b ，c ，d 的值．（8 分）同学们都知道，4-(-2)表示4与-2的差的绝对值，实际上也可理解为4与-2两数在数轴行所对应的两点之间的距离，同理x -3 也可理解为x 与3 两数在数轴上所对应的两点之间的距离，x+1 =x-(-1)就表示x 在数轴上对应的点到-1 的距离，由上面绝对值的几何意义，解答下列问题：（1）求4-(-2)=．（2）若(x- 2)= 5 ，则x=．（3）请你找出所有符合条件的整数x ，使得1-x +x +2 = 3 ．（4）求x -3 +x + 2 +x +6 的最小值，并写出此时x 的取值情况．（5）已知x -1 +x + 2 +y -3 +y + 4 = 10 ，求2x +y 的最大值和最小值．）））、）9．小何买了4本笔记本，10支圆珠笔，设笔记本的单价为a 元，圆珠笔的单价为b 元，则小何共花费 元（用含a 、b 的式子表示）. 10．2xy-的系数是a ，次数是b ，则a ＋b = . 11．若313m x y +与126n x y +是同类项，则m ＋n = .12．把多项式x 2－2－3x 3＋5x 按x 的升幂排列为 . 13．已知多项式3x 2－4x 的值为9，则6x 2－8x －6的值为 .14．在有理数的原有运算法则中，我们定义一个新运算“★”如下：x ≤ y 时，x ★y = x 2；x ＞y 时，x ★y = y . 则（－2★－4）★1的值为 .15．计算：（－3. 14）＋（＋4. 96）＋（＋2. 14）＋（－7. 96）.16．计算：（－3）2－60 ÷22×110＋|－2|.17．计算：2x2y3＋（－4 x2y3）－（－3 x2y3）. 18．计算：（3a2－2a）－2（a2－a－1）.19．已知A = 3x2＋4xy，B = x2＋3xy－y2，求2B－A.20．先化简，再求值：5x2－[3x－2（2x－3）＋7x2]，其中x=1 2 .得分评卷人四、解答题（每小题7分，共28分）21．小明做了如下一道有理数混合运算的题目：﹣34÷（﹣27）－[（﹣2）×（﹣43）＋（﹣2）]3= 81÷（﹣27）－[ 83＋（－8）]= ……思考：（1）请用圆圈圈出小明第一步计算中的错误；（2）正确的解答这道题.22．老师设计了一个数学实验，给甲、乙、丙三名同学各一张写有已化为最简的整式的卡片，规则是两位同学的整式相减等于第三位同学的整式，则实验成功. 甲、乙、丙的卡片如图所示，丙的卡片有一部分看不清楚了.（1）计算出甲减乙的结果，并判断甲减乙能否使实验成功；（2）嘉琪发现丙减甲可以使实验成功，请求出丙的整式.甲乙丙（第22题）2x2－3x－1x2－2x＋3＋223．长春市地铁1号线，北起北环站，南至红咀子站，共设15个地下车站，15 个站点如图所示. 某天，王红从人民广场站开始乘坐地铁，在地铁各站点做志愿者服务，到A 站下车时，本次志愿者服务活动结束. 约定向红咀子站方向为正，当天的乘车记录如下（单位：站）：＋5，－2，－6，＋8，＋3，－4，－9，＋8. （1）请通过计算说明A 站是哪一站；（2）若相邻两站之间的距离为1.3千米，求这次王红志愿服务期间乘坐地铁行进的路程是多少千米?（第23题）24．如图，长为50 cm ，宽为x cm 的大长方形被分割为8小块，除阴影A 、B 外，其余6块是形状、大小完全相同的小长方形，其较短一边长为a cm.（1）由图可知，每个小长方形较长的一边长是 cm （用含a 的代数式表示）； （2）当x = 40时，求图中两块阴影A 、B 的周长和. （第24题）红咀子南部新城市政府卫星广场繁荣路工农广场东北师大儿童公园人民广场胜利公园长春站长春站北一匡街庆丰路北环25．如图，在数轴上点A 表示的数是8，若动点P 从原点O 出发，以2个单位/秒的速度向左运动；同时另一动点Q 从点A 出发，以4个单位/秒的速度也向左运动，到达原点后立即以原来的速度返回，向右运动，设运动的时间为t （秒）. （1）当t = 0.5时，求点Q 到原点O 的距离； （2）当t = 2.5时，求点Q 到原点O 的距离；（3）当点Q 到原点O 的距离为4时，求点P 到原点O 的距离.（第25题）QP OA26．为丰富校园体育生活，某校增设网球兴趣小组，需要采购某品牌网球训练拍30支，网球x筒（x＞30）. 经市场调查了解到该品牌网球拍定价100元/支，网球20元/筒，现有甲、乙两家体育用品商店有如下优惠方案：方案一：甲商店：买一支网球拍送一筒网球；方案二：乙商店：网球拍与网球均按定价90%付款.（1）方案一：到甲商店购买，需要支付元；方案二：到乙商店购买，需要支付元（用含x的代数式表示）；（2）若x = 10，请通过计算说明学校采用以上哪个方案较为优惠；（3）已知x = 100，如果到甲店购买30支球拍（送30筒球），剩余的网球到乙店购买，能更省钱吗?如果可以更省钱，请直接写出比方案一省多少钱?名校调研系列卷·七年上期中测试 数学（人教版）参考答案一、1. A 2. C 3. B 4. D 5. C 6. B 二、填空题：7. ＞ 8. 5.619. （4a ＋10b ） 10.11. 312. －2＋5x ＋x 2－3x 313. 1214. 16三、15. 解：原式=（－3. 14＋2. 14）＋（＋4. 96－7. 96）= －1－3 =－4. 16. 解：原式= 9－60×14×110＋2 = 9－32＋2 =192. 17. 解：原式= 2x 2y 3－4x 2y 3＋3x 2y 3 = x 2y 3. 18. 解：原式= 3a 2－2a －2a 2＋2a ＋2 = a 2＋2.四、19. 解：2B －A =2（x 2＋3xy －y 2）－（3x 2＋4xy ）= 2x 2＋6xy －2y 2－3x 2－4xy =－x 2＋2xy －2y 2 .20. 解：5x 2－[3x －2（2x －3）＋7x 2] = 5x 2－（3x －4x ＋6＋7x 2）= 5x 2－3x ＋4x －6－7x 2=－2x 2＋x －6.当x =12时，原式=－2×（12）2＋12－6 =12 ＋12－6 =－6. 21. 解：（1） ； （2）﹣34÷（﹣27）－ [（﹣2）×（﹣43）＋（﹣2）]3=－81÷（﹣27）－（83－2）3 = 3－（23）3 = 3－827=19227.22. 解：（1）根据题意，得：2x 2－3x －1－（x 2－2x ＋3）= 2x 2－3x －1－x 2＋2x －3 = x 2－x －4，则甲减乙不能是实验成功；（2）根据题意，得，丙表示的整式为2x 2－3x －1＋ x 2－2x ＋3 = 3x 2－5x ＋2.五、23. 解：（1）＋5－2－6＋8＋3－4－9＋8= 3，答：A 站是工农广场站；（2）（5＋2＋6＋8＋3＋4＋9＋8）×1. 3 = 45×1. 3 = 58. 5（千米）， 答：这次王红志愿服务期间乘坐地铁行进的路程是58. 5千米.24. 解：（1）（50－3a ）；（2）2 [50－3a ＋（x －3a ）]＋2 [3a ＋x －（50－3a ）]= 2（50＋x －6a ）＋2（6a ＋x －50） = 100＋2x －12a ＋12a ＋2x －100 = 4x .当x = 40时，原式= 4×40 = 160 .32= 81÷（－27）－[83＋（－8）]= ……六、25. 解：（1）当t = 0. 5时，AQ = 4t = 4×0. 5= 2，∵OA = 8，∴OQ = OA－AQ = 8－2 = 6，∴点Q到原点O的距高为6；（2）当t = 2. 5时，点Q运动的距离为4t = 4×2. 5 = 10，∴OQ =10－8 = 2，∴点Q到原点O的距离为2；（3）当点Q到原点O的距离为4时，∵OQ = 4，∴当点Q向左运动时，OA = 8，则AQ = 4，∴t = 1，∴OP = 2；当点Q向右运动时，OQ = 4，∴点Q运动的距离是8＋4 = 12，∴运动时间t=12÷4 = 3，∴OP = 2×3 = 6，∴点P到原点O的距离为2或6.26. 解：（1）甲商店购买需付款30×100＋（x－30)×20 = 20x＋30×（100－20）=（20x＋2400）元；乙商店购买需付款100×90%×30＋20×90%×x =（18x＋2700）元.故答案为：（20x＋2400），（18x＋2700）；（2）当x = 100时，甲商店需20×100+2400 = 4400（元）；乙商店需18×100+2700 = 4500（元）；所以甲离店购买合算；（3）先在甲商店购买30支球拍，送30筒球需3000元，差70筒球在乙商店购买需1260元，共需4260元，4400－4260 = 140（元），比方案一省140元钱.2020年秋绵阳外国语学校人教版初中七年级数学上册期中试题（附答案）一、选择题(每小题3分,共30分)1.-2 020的相反数的倒数是 ()A.-2 020B.2 0202.(2019安徽中考)在-2,-1,0,1这四个数中,最小的数是 ()A.-2B.-1C.0D.13.(2019内蒙古呼和浩特中考)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,下面检测过的四个排球,在其上方标注了检测结果,其中质量最接近标准的一个是 ()4.(2019吉林长春中考)如图1,数轴上表示-2的点A到原点的距离是 ()A.-2B.25.下列各式:-(-5)、-|-5|、-52、(-5)2、1-5 ,计算结果为负数的有 ()A.4个B.3个C.2个D.1个6.(2020独家原创试题)疫情期间,在例行体温测量中,检查人员将高出37 ℃的部分记作正数,将低于37 ℃的部分记作负数,体温正好是37 ℃时记作“0”.某人员在一周内的体温测量结果分别为+0.1,-0.3,-0.5,+0.1,+0.2,-0.6,-0.4,那么该人员一周中测量体温的平均值为 ()A.37.1 ℃B.37.31 ℃C.36.69 ℃D.36.8 ℃7.下列说法正确的是 ()A.5不是单项式B.多项式-2x2+5x中,第一项-2x2的系数是2C.单项式- 的系数是- ,次数是4D.多项式3x2y-xy2+2xy的各项分别是3x2y、xy2、2xy8.下列计算中,正确的是 ()A.6a+4b=10abB.7x2y-3x2y=4C.7a2b-7ba2=0D.8x2+8x2=16x49.已知有理数a,b在数轴上的位置如图所示,下列结论错误的是 ()A.|a|<1<|b|B.1<-a<bC.1<|a|<bD.-b<a<-110.如图所示的图形都是由面积为1的正方形按一定的规律组成的,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,第(4)个图形中面积为1的正方形有14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.20B.27C.35D.40二、填空题(每小题3分,共30分)11.(2020广西玉林中考模拟)若4a2b2n+1与a m b3是同类项,则m+n= .12.已知多项式-2m3n2-5中,含字母的项的系数为a,多项式的次数为b,常数项为c,则a+b+c= .13.比较大小:-(-0.3)1-3(填“=”“>”或“<”).14.冬季供暖后,乐乐发现室内的温度为20 ℃,此时冰箱冷冻室的温度为-5 ℃,则室内的温度比冰箱冷冻室的温度高℃.15.计算:-18÷(-3)2+5× 1-8⎛⎫⎪⎝⎭-(-15)÷5= .16.若a2+b2=5,则代数式(3a2-2ab-b2)-(a2-2ab-3b2)的值是 .17.图的数轴上有两处不小心被墨水淹没了,所标注的数据是墨水部分边界与数轴相交点的数据,则被淹没的整数点有个,负整数点有个.18.若m2-2m=1,则代数式2m2-4m+3的值为 .19.已知一个三角形三边的长分别为(2x+1)cm,(x2-2)cm,(x2-2x+1)cm,则该三角形的周长为 cm.20.观察下面一组数:-1,2,-3,4,-5,6,-7,…,将这组数排成如图5所示的形式,按照规律排下去,则第11行中从左边数第10个数是 .三、解答题(共60分)21.(12分)计算:(用简便方法计算).22.(6分)(1)化简:x2-(2x2-4y)+2(x2-y);(2)先化简,再求值:3(2a2b-ab2)-2(5a2b-2ab2),其中a=2,b=-1.23.(2020独家原创试题)(6分)书是人类进步的阶梯!为爱护书一般都将书本用封皮包好,现有一本如图①的数学课本,其长为26 cm、宽为18.5 cm、厚为1 cm,小海宝用一张长方形纸包好了这本数学书,他将封面和封底各折进去x cm,封皮展开后如图②所示,求:(1)小海宝所用包书纸的周长是多少?(用含x的代数式表示)(2)当封面和封底各折进去2 cm时,请帮小海宝计算一下他需要的包书纸的面积24.(8分)在元旦晚会上,小邦同学设计了一个游戏,其规则是:在卡片上写有算式,参加游戏的人可随意抽取一张卡片,计算对应的算式,若结果为负数,就为同学们唱歌;若结果为正数,则可以得到一张贺年卡.图是四位同学抽取的四张卡片,请通过计算说明哪些同学为同学们唱歌,哪些同学能得到贺年卡.25.(8分)小明的妈妈在菜市场买回3斤萝卜、2斤排骨,准备做萝卜排骨汤.妈妈:“上个月萝卜的价格是a元/斤,排骨的价格是b元/斤.”爸爸:“今天,报纸上说与上个月相比,萝卜的价格上涨50%,排骨的价格上涨20%.”小明:“爸爸、妈妈,我想知道今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花多少元.”(1)请你求出今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花多少元;(2)当a=2,b=15时,今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花多少元?26.(10分)观察下面三行数:①-3,9,-27,81,-243,…;②-5,7,-29,79,-245,…;③-1,3,-9,27,-81,….(1)用乘方的形式表示第①行数中的第2 016个数;(2)第②、③行数与第①行数分别有什么关系?(3)分别取每行的第10个数,计算这三个数的和.27.(10分)如图,数轴上点A表示数a,点C表示数c,且多项式x3-3xy29-20的常数项是a,次数是c.我们把数轴上两点之间的距离用表示两点的大写字母表示,比如,点A与点C之间的距离记作AC.(1)求a,c的值;(2)若数轴上有一点D满足CD=2AD,则D点表示的数为 ;(3)动点B从数1对应的点开始向右运动,速度为每秒1个单位长度,同时点A,C在数轴上运动,点A,C的速度分别为每秒2个单位长度,每秒3个单位长度,运动时间为t秒.①若点A向右运动,点C向左运动,当AB=BC时,求t的值;②若点A向左运动,点C向右运动,2AB-mBC的值不随时间t 的变化而改变,求m的值.参考答案1.答案 D-2 020的相反数是2 020,2 020的倒数是1 2 020 ,故选D.2答案 A根据有理数比较大小的方法,可得-2<-1<0<1,∴在-2,-1,0,1这四个数中,最小的数是-2.故选A.3.答案 A四个排球质量偏差的绝对值分别为0.6,0.7,2.5,3.5,绝对值最小的为0.6,最接近标准.故选A.4.答案 B数轴上表示-2的点A到原点的距离是2,故选B.5.答案 B-(-5)=5,-|-5|=-5,-52=-25,(-5)2=25, 1-5=-1-5 ,所以计算结果为负数的有3个.6.答案 D[(+0.1)+(-0.3)+(-0.5)+(+0.1)+(+0.2)+(-0.6)+(-0.4)]÷7=-0.2,37+(-0.2)=36.8 ℃,故选D.7.答案 C5是单项式;多项式-2x2+5x中,第一项-2x2的系数是-2;多项式3x2y-xy2+2xy的各项分别是3x2y、-xy2、2xy,只有C正确.8.答案 C6a与4b不是同类项,不能合并,故A错误;7x2y-3x2y=4x2y,故B错误;8x2+8x2=16x2,故D错误.故选C.9.答案 A如图,根据各数在数轴上的位置可知:-b<a<-1<1<-a(或|a|)<b(或|b|),所以1<-a<b,1<|a|<b,-b<a<-1均正确,只有|a|<1<|b|错误.故选A.10.答案 B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2+3=5个,第(3)个图形中面积为1的正方形有2+3+4=9个,第(4)个图形中面积为1的正方形有2+3+4+5=14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 6(63)2⨯+=27.故选B.11.答案 3解析∵4a2b2n+1与a m b3是同类项,∴m=2,2n+1=3,解得m=2,n=1,∴m+n=2+1=3.12.答案-2解析∵多项式-2m3n2-5中,含字母的项的系数为a,多项式的次数为b,常数项为c,∴a=-2,b=5,c=-5,∴a+b+c=-2+5-5=-2.13.答案<解析因为-(-0.3)=0.3, 1-3=13 ,0.3<13 ,所以-(-0.3)<1-3 .14.答案25解析20-(-5)=20+5=25(℃).15.答案 3 8解析原式=-18÷9+5×1-8⎛⎫⎪⎝⎭ -(-15)÷5=-2-58 +3=38 .16.答案10解析(3a2-2ab-b2)-(a2-2ab-3b2)=3a2-2ab-b2-a2+2ab+3b2=2a2+2b2=2(a 2+b2).当a2+b2=5时,原式=2×5=10.17.答案69;52解析由题中数轴可知,-72 12 和-4115 之间的整数点有:-72,-71,…,-42,共31个;-21 34和1623 之间的整数点有:-21,-20, (16)共38个.故被淹没的整数点有31+38=69个,负整数点有31+21=52个.18.答案 5解析∵m2-2m=1,∴2m2-4m+3=2(m2-2m)+3=2×1+3=5. 19.答案2x2解析所求周长为(2x+1)+(x2-2)+(x2-2x+1)=2x+1+x2-2+x2-2x+1=2x2(cm).20.答案110解析观察数的排列规律,第n行的第1个数的绝对值为(n-1)2+1,所以第11行的第1个数的绝对值为(11-1)2+1=101,所以第11行中从左边数第10个数的绝对值是101+(10-1)=110,易知奇数的符号为“-”,偶数的符号为“+”,所以第11行中从左边数第10个数是110.21.解析=-35-14+27=-22.=-16-12=-28.=-13-0.34=-13.3422.解析(1)x2-(2x2-4y)+2(x2-y)=x2-2x2+4y+2x2-2y=x2+2y.(2)3(2a2b-ab2)-2(5a2b-2ab2)=6a2b-3ab2-10a2b+4ab2=-4a2b+ab2.当a=2,b=-1时,原式=-4×22×(-1)+2×(-1)2=18.23.解析(1)小海宝所用包书纸的周长:2(18.5×2+1+2x)+2(26+2x)=2(38+2x)+2(26+2x)=(8x+128)cm.答:小海宝所用包书纸的周长为(8x+128)cm.(2)当x=2时,包书纸长为18.5×2+1+2×2=42(cm),包书纸宽为26+2×2=30(cm),所以面积为42×30=1 260(cm2).答:需要的包书纸的面积为1 260 cm2.24.解析①号卡片:(-4)×(-3)-(-2)3=12-(-8)=20,是正数;②号卡片:(-3)×(-2)2+5=-3×4+5=-12+5=-7,是负数;所以抽到②、③、④号卡片的同学为同学们唱歌,抽到①号卡片的同学能得到一张贺年卡.25.解析(1)今天买的萝卜的价格是(1+50%)a元/斤,排骨的价格是(1+20%)b元/斤,今天买3斤萝卜、2斤排骨花的钱是[3(1+50%)a+2(1+20%)b]元,上个月买3斤萝卜、2斤排骨花的钱是(3a+2b)元,所以今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花的钱为3(1+50%)a+2(1+20%)b-(3a+2b)=(1.5a+0.4b)元. 答:今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花(1.5a+0.4b)元.(2)当a=2,b=15时,1.5a+0.4b=1.5×2+0.4×15=9.答:当a=2,b=15时,今天买的萝卜和排骨比上个月买同质量的萝卜和排骨多花9元.26.解析(1)第①行数中的第2 016个数为32 016.(2)第②行每一个数等于第①行相应位置上的数加上-2;第③行每一个数等于第①行相应位置上的数乘13 .(3)第①行的第10个数为310;第②行的第10个数为310-2;第③行的第10个数为39.这三个数的和为310+310-2+39=7×39-2.27.解析(1)a=-20,c=30.(2)分三种情况讨论:当点D在点A的左侧时,∵CD=2AD,∴AD=AC=50.∴点D表示的数为-20-50=-70; 当点D在点A,C之间时,当点D在点C的右侧时,AD>CD,与CD=2AD相矛盾,不符合题意.。
2020-2021学年广东省深圳市中山中学七年级上学期期中英语试题
2020-2021学年广东省深圳市中山中学七年级上学期期中英语试题1. Jane is so friendly that everyone likes her very much.A．boring B．noisy C．kind2. —Look! There is a lot of rubbish in this river.—Yes. It’s too bad! We shouldn’t pollute it.A．make...clean B．make...dry C．make...dirty3. —What kind of house do you want to buy?—I want to buy a house with a large garden.A．very clean B．very beautiful C．very big4. —In our daily life, we should have a habit of eating healthy food.—Yes, I agree with you. Eating healthily is really important.A．funny B．busy C．everyday5. —How long will the film last?—For two hours. It will end at 6 p.m. and then let’s have dinner together.A．finish B．leave C．cut6. A(n) ________ is a game or competition in which people try to answer questions in a test.A．activity B．quiz C．club7. —Sam, what’s your _______?—I like playing the piano.A．age B．hobby C．job8. —I am tired. Shall we _______?—Sure. It’s not easy work.A．have a break B．have a look C．have a try9. —It’s sunny with a little wind today. Let’s _______.—Good idea. I know there is a large empty place near our home.A．go swimming B．fly kites C．make snowmen 10. —Why do you want to _______ these clothes?—They aren’t popular. I don’t want to wear them again.A．put on B．look for C．throw away11. —Tom, is it difficult for you _______ your Math homework?—Yes. I often ask my teacher for help.A．doing B．do C．to do12. —Mary loves studying. She always goes to school early.—Yes. She is _______ late for school.A．usually B．never C．sometimes 13. —Can I help you, Sir?—Three _______ of _______, please.A．cup; coffee B．cups; coffee C．cups; coffees 14. There is _______ “x” in the word “box”.A．a B．an C．the15. —There _______ a lot of plastic bags on the beach.—That’s why there _______ a lot of white pollution in this city.A．are; is B．are; are C．is; are16. —Thank you for _______ us _______ so much delicious food, Mrs. Black. —You’re welcome. I am happy you like it.A．taking; to B．putting; into C．providing; with 17. —Can I play computer games now, Mom?—No, you can’t. You _______ finish your homework first.A．can B．may C．have to18. —When do you usually get up, Jerry?—I _______ up at 6:00 every day.A．will get B．get C．got19. —Excuse me. My baby is sleeping. Please turn the music down.—_______.A．Sorry, I will B．Have a nice sleep C．I like music 20. —Would you like another piece of bread?—_______. I’m already full.A．Yes, please B．I would love to C．No, thank you21. 语篇排序。
深圳市深圳中学2020-2021学年七年级上学期期中英语试卷
2020-2021学年度第一学期期中考试初一年级英语学科试卷2020年11月12日Ⅰ. 词汇测试i. 从下面每小题的A、B、C三个选项中选出所给句子相对应的音标，并在答题卡上将相应的字母编号涂黑。
（共2小题，每小题1分）1.How short it is！A./haʊ/ /ʃɔːt/ /ɪt/ /ɪs/B./haʊ/ /sɔːt/ /ɪt/ /ɪs/C. /haʊ/ /ʃɔːt/ /ɪt/ /ɪz/2.It’s interesting to make snowmen.A./ɪts/ /ˈɪntrəstɪŋ/ /tu:/ /meɪk/ /'snəʊmen/B./ɪts/ /ˈɪntrəstɪŋ/ /tu:/ /meɪk/ /'snəʊmæn/C. /ɪtz/ /ˈɪntrəstɪŋ/ /tu:/ /meɪk/ /'snəʊmæn/ii. 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。
（共4小题，每小题1分）3.-- What tine can you complete your homework?-- at about 5:00 p.m. Then I can go to the cinema with you.A.finishB.getC.take4.-- How much did you spend on the shoes?-- About 300 yuan.A.pay fore forC.plan for5. -- Do waiters in the Mc Donald provide you with hot water？-- Yes, they do. They are friendly to each customer.A.buy hot water for youB.give hot water to youC.share hot water with you6. -- What are your friends doing over there?-- They are playing games and having a good time on the playground.ughing loudlyB.running quicklyC.enjoying themselvesiii. 从下面每小题的A、B、C三个选项中选出可以填入空白处的最佳选项。
2024-2025学年广东省深圳市福田区深圳实验学校中学部七年级上学期期中考试英语试题
2024-2025学年广东省深圳市福田区深圳实验学校中学部七年级上学期期中考试英语试题Birthdays are important to all of us. I’m Sarah. Today is 3rd December and it is a special ________ for my sister Mary—it is her birthday. And it’s not a busy day, so we can do many things to________ it.Our parents take us to a sports shop in the morning. It has a ________ today. Things there are cheap now. They ________ a pair of ping-pong bats (乒乓球拍) for Mary. She is so ________ because she loves to play ping-pong. Then we buy a ________ cake and take it home. We have a party for Mary in the evening. Tina and Jean come to the party too. They are all ________ of Yuying Middle School. During the party, they show their ________ to Mary. Tina makes a card. Jean gives a pen as a gift to Mary. After that, Mary ________ out the candles and makes a wish. Then, we ________ the chocolate cake and sing Happy Birthday together.We all have a good time!1.A．class B．name C．date D．number2.A．draw B．study C．break D．celebrate3.A．sale B．visit C．use D．mark4.A．watch B．buy C．put D．make5.A．afraid B．sad C．worried D．happy6.A．fruit B．chocolate C．carrot D．cream7.A．students B．nurses C．doctors D．cooks8.A．lessons B．maps C．pictures D．gifts9.A．cuts B．takes C．blows D．washes10.A．post B．enjoy C．change D．choose Should friends be different or the same? We asked three people about their ideas. Here are their answers.James GreenHuang LeiMary Smith11. What are James Green and Yuan Li both like?A．Outgoing. B．Quiet. C．Funny. D．Strong. 12. Who is Mary Smith’s best friend?A．Huang Lei. B．Leo. C．James. D．Carol.13. Which kind of person would Huang Lei like to make friends with?A．Someone funny. B．Someone similar to him.C．Someone more outgoing. D．Someone different from him.14. How many ideas about making friends are mentioned (被提及) in the passage?A．One. B．Two. C．Three. D．Four.15. Which of the following is TRUE?A．There are some differences between James Green and his best friend.B．Huang Lei looks stronger than his best friend.C．Mary Smith thinks differences are important in a friendship.D．Mary Smith thinks it’s important to be the same.My name is Barry. My favorite day is Sunday. I don’t need to go to school. My father doesn’t go to work on Sundays. We often do some interesting things.Sometimes we go to the countryside to see my grandfather. My mother often makes some vegetable hamburgers and asks us to take them to my grandfather. The vegetable hamburgers are very nice. My grandfather likes them very much.Sometimes we go to the museums. In the museums, we can see many kinds of interesting things and learn about science and history. We usually go there in the morning. We went to the Hong Kong Space Museum last Sunday. And we had a happy morning there.Sometimes my father and I take my dog Frank to play in the park. I like Frank very much. He is a clever dog.My father helps me train him. Now he can play soccer and dance.Sometimes we go on trips. Last month, my father drove my mother and me to Beijing. We climbed the Great Wall and took photos of stone animals. We ate Beijing Roast Duck and bought some gifts for my grandfather. Finally, I visited the Palace Museum with my parents. We had a great time there.16. Which is NOT Barry’s reason that his favorite day is Sunday?A．Barry doesn’t go to school.B．His mother and he can go to the park.C．His father doesn’t go to work on Sundays. D．His father and he can do some interesting things.17. When did they go to the Hong Kong Space Museum?A．Last Sunday. B．This Sunday. C．Last month. D．This month.18. What does the underlined word “train” in Paragraph 4 mean?A．wash B．teach C．feed D．kick19. What did Barry do during his trip to Beijing?① bought some presents ② climbed the Great Wall③ ate Beijing Roast Duck ④ played in the parkA．②③④B．①③④C．①②④D．①②③20. What’s the best title for the passage?A．Barry’s trip B．Barry’s Father C．Barry’sFavourite Day D．Barry’s school dayI often dreamed about Pisa when I was a boy. I read about the famous Leaning Tower of Pisa. But when I read the word “Pisa”. I thought of pizza. I thought the tower (塔) was a place selling pizza. “It must be the best place to buy pizza in the world.” I thought.Many years later, I finally saw the tower. I knew that it was Pisa but not pizza. But there was still something special about it for me. The tower got its name because it really leaned (斜) to one side. Some people tried to fix it. They were afraid it might fall over.I don’t think it’s a good idea to fix it. The tower probably will not fall down. It is already over 670 years old.I think the tower tells us nothing is perfect (完美的). Imperfect things may be more interesting. Let’s take the tower for example. There are many other older and more beautiful towers in Italy. But the Leaning Tower of Pisa is the most famous. I think that’s because it’s special and imperfect. 21. What did the writer think of the Leaning Tower Of Pisa when he was a boy?A．He thought it was a place selling pizza. B．He thought it was a hotel in Paris.C．He thought it was in the USA. D．He thought it was in the UK.22. How old is the Leaning Tower of Pisa?A．It’s over 670 years old.B．It’s over 720 years old.C．It’s over 760 years old.D．It’s over 270 years old.23. What’s the problem with the tower?A．It was too ugly. B．It was too high. C．It leaned to oneside. D．It was not beautiful.24. What does the word “fix” mean in Chinese?A．安装B．修理C．推倒D．打败25. What can we learn from the passage?A．The Leaning Tower of Pisa is perfect.B．The writer thinks the tower might fall over.C．The Leaning Tower of Pisa is in Italy.D．The writer doesn’t see the tower till (直到) now.Autumn is the season which follows summer. 26 . In the northern hemisphere (北半球), the weather is starting to get cooler (更冷).27 . Their colors change from green to beautiful golden (金色的) colors such as oranges, yellow and brown. These leaves fall to the ground, leaving the trees bare (光秃秃的). Many people like to travel (旅行) during autumn to enjoy the beauty of the leaves. 28 .Autumn is the time when many animals begin to gather (采集) food for the winter. Squirrels (松鼠) and other animals busily start gathering food. 29 .Autumn is also a harvest (丰收) time. 30 . Pumpkins (南瓜) are healthy vegetables which are harvested in autumn. They are used to (被用来) make pumpkin soup and pumpkin pie. Farmers (农民) use pumpkins to make the heads of scarecrows (稻草人). Scarecrows help to scare (使害怕) away birds so that (为了) they can’t eat farmers crops (谷物). Autumn is really a good season.Emily的需求选择最适合他们的公园。
深圳南山实验学校初中部2020-2021年上册期中化学试题(含答案)
深圳南山实验学校初中部2020-2021年上册期中化学试题(含答案)一、选择题（培优题较难）1．在密闭容器内，有甲、乙、丙、丁四种物质，在一定条件下充分反应，测得反应前后各物质的质量分数如图所示，下列说法错误的是（）A．该反应符合质量守恒定律B．生成的甲，丙两物质的质量比为8：1C．乙可能是该反应的催化剂D．参加反应的丁的质量等于生成的甲和丙的质量之和2．下列对实验现象的描述或实验操作正确的是A．红磷在空气中燃烧，产生大量白雾B．点燃或加热可燃性气体前，先检验其纯度C．10mL酒精与10mL蒸馏水混合，溶液的体积为20mLD．用高锰酸钾制取O2后，应先熄灭酒精灯再从水中取出导气管3．碳12是指含6个中子的碳原子。
下列对氧16和氧18两种氧原子的说法正确的是A．质子数相同B．质量相同C．电子数不相同D．16和18表示原子个数4．实验室常用加热高锰酸钾固体制取氧气，化学方程式为2KMnO4K2MnO4＋MnO2＋O2↑，现对一定量的高锰酸钾固体进行加热，加热过程中涉及的相关量随时间变化的图象正确的是A．B．C．D．5．下列有关碳和碳的氧化物的说法，错误的是（）A．《清明上河图》至今图案清晰可见，是因为在常温下碳单质的化学性质稳定B．碳在空气充分燃烧时生成CO2，不充分燃烧时生成COC．CO和CO2组成元素相同，所以它们的化学性质也相同D．CO可用于冶炼金属、做气体燃料； CO2可用于人工降雨、灭火6．我国古代典籍中有”银针验毒”的记载，“银针验毒”的反应原理之一是4Ag+2H2S +O2=2X+2H2O。
下列有关该反应的说法不正确的是A．反应属于氧化反应B．X的化学式是Ag2SC．反应前后元素的种类不变D．反应前后所有元素的化合价都发生了变化7．如图是四种粒子的结构示意图，下列有关说法正确的是（）A．④表示的粒子属于金属元素B．①表示的粒子在化学反应中易失电子C．①②③④表示四种不同元素D．②④所表示的粒子化学性质相似8．实验室里制取氧气大致可分为下列步骤：①点燃酒灯，加热试管；②检查装置的气密性；③将药品装入试管，用带导管的塞子塞紧试管并固定在铁架台上；④用排水法收集氧气；⑤连接好装置；⑥熄灭酒精灯；⑦将导管从水槽中取出。
2020-2021学年广东省深圳市福田区深圳高级中学七年级上学期期中数学试卷(含答案)
2020~2021学年福田区深圳高级中学初一上学期期中数学试卷一、选择题1.的相反数是( )A. B. C. D.2.截至北京时间月日时分左右，全球因感染新冠肺炎而死亡的病例约例，个国家确诊病例超过万例．携手抗“疫”，刻不容缓．数据可以用科学记数法表示为（ ）．A. B. C. D.3.一个正方体的平面展开图如图所示，将它折成正方体后，与汉字“深”相对的面上的汉字是（ ）深圳先行示范A.先B.行C.示D.范4.如图是由几个大小相同的小立方块搭成的几何体从上面看到的形状图，其中小正方形中的数字表示在该位置的小立方块的个数．则这个几何体从正面看到的形状图是（ ）．A. B. C. D.5.下列运算正确的是（ ）．A. B. C. D.A.B.C.D.6.某班共有名学生，其中女生人数占，那么男生人数是（ ）．A.B.C.或D.或7.若数轴上点表示，且，则点表示的数是（ ）．8.关于整式的概念，下列说法正确的是（ ）． A.的系数是B.的次数是C.是单项式D.是五次三项式A.B.C.D.9.若，则代数式的值为（ ）．A.正数B.负数C.非正数D.非负数10.若，则表示（ ）．A.个B.个C.个D.个11.下列说法中正确的有（ ）．①绝对值相等的两个有理数相等；②若，互为相反数，则；③有理数分为正数和负数；④若，则是的平分线．A. B. C. D.12.如图所示，在这个数据运算程序中，若开始输入的的值为，第一次运算结果输出的是，返回进行第二次运算则输出的是，，则第次输出的结果是（ ）．入偶数奇数出二、填空题13.如果用表示“加分”，则“扣分”用 表示．14.用一个平面去截正方体，边数最多的截面是 边形．15.若，互为倒数，，互为相反数，．则的值为 ．第行第行第行第行第行第行16.如图是南宋数学家杨辉在《详解九章算法》中出现的三角形状的数阵，又称为“杨辉三角形”．该三角形中的数据排列有着一定的规律．按此规律排列下去，第行的左边第个数是 ．（用含的代数式表示）三、解答题17.计算：．18.先化简，再求值：的值，其中，．（1）（2）19.某品牌免洗洗手液每瓶标准质量为克，从生产的免洗洗手液中抽出样品瓶，检测每瓶的质量是否符合标准．与标准质量相比，超过或不足的部分分别用正、负数来表示，记录如下表：与标准质量的差值（单位：克）瓶数若规定与标准质量相差克之内（含克）为合格，则这瓶样品中合格的共有多少瓶？这批样品的总质量比标准质量多还是少？多或少几克？12（1）（2）20.某学习小组在学习线段中点和角平分线的概念时，发现它们有相同之处．如图，已知，点为线段上的一个动点，点、分别是、的中点．若点恰为的中点，则．当点的位置发生变化时，的长度是否发生变化？请说明理由．如图，已知射线在的内部，若、分别是、的平分线，试探究与的数量关系，并说明理由．（1）（2）（3）21.小红和小明一同为教室的窗户设计装饰物（装饰物完全避光），小红设计的装饰物如图所示，装饰物是由三个半圆组成（半径相同）．请用代数式表示：窗帘的面积： ，能射进阳光的面积： ．（结果保留）当，时，求窗户能射进阳光的面积是多少．(取）小明设计的装饰物如图所示（装饰物由三个半圆和两个四分之一圆组成，半径相同），请你计算：小明的设计跟小红的比，能射进阳光的面积哪个更大?大多少?22.观察下列算式，并回答问题：（1）（2）（3）第个算式：；第个算式：；第个算式：；第个算式：；直接写出第个算式： ．根据上述规律，计算：．类比探究，并计算：．（1）12（2）（3）23.已知、、为数轴上三点，若点到点的距离是点到点的距离的倍，则称点是的奇异点．例如图中，点表示的数为，点表示的数为，点表示的数是，点到点的距离为，到点的距离为，则点是的奇异点，但不是的奇异点．如图，点是的奇异点，则点表示的数是 ．如图，若数轴上、两点表示的数分别为和．-4若的奇异点在、两点之间，则点表示的数是 ．若的奇异点在点的右侧，试求出点表示的数．如图，点、在数轴上表示的数分别为和，点是数轴上的动点．则点能否是的奇异点？如果能，试算出点表示的数，如果不能，请说明理由．【答案】解析:解：的相反数是：．故选：B．解析:数据可以用科学记数法表示为．故选．B 1.C 2.C3.解析:正方体由个面组成，有组面相对；由正方体的平面展开图可知，相对面不相邻，则“深”与“示”相对；“圳”与“行”相对；“先”与“范”相对；所以与汉字“深”相对面上的汉字是“示”．故选．解析:从上面看到的形状图可知，这个几何体从正面看到的形状图是．故选．解析:某班共有名学生，其中女生人数占，则女生人数为，那么男生人数是．故选．解析:；，故点表示的数是或．故选．解析:因为，所以，所以D 4.D 5.B 6.D 7.C 8.A 9.．故选．解析:正数的绝对值是它本身，负数的绝对值是它的相反数，的绝对值是，若，则是正数或，即表示非负数．故选．解析:①绝对值相等的两个有理数相等或互为相反数，所以本选项说法错误，不符合题意；②的相反数是，此时没有意义，所以本选项说法错误，不符合题意；③有理数分为、正数和负数，所以本选项说法错误，不符合题意；④若在内部，，是的平分线，若在外部则不是，故错误．故选：．解析:开始输入的值为，是偶数，输出；第二次输入是奇数，输出；第三次输入是偶数，输出；第四次输入是偶数，输出；第五次输入是偶数，输出；第六次输入是奇数，输出；第七次输入是偶数，输出由规律可知，每次的结果为一次循环交替出现，，所以第次运算输出的结果与第次输出的结果一样，则第次运算输出结果为，故选．D 10.D 11.C 12.解析:加分和扣分具有相反意义，如果用表示“加分”，则“扣分”用表示．故答案为：．解析:正方体作为六个面，欲截最多边，肯定是平面与最多的面相交，形成的交线越多，多边形边数就越多，可取正方形的一个面先与截面相交，则截面必然与次面的对面相交，形成两个相互平行的边，那么取两条边的同一端点，在该端点中间的边上，可找到与截面的交点一个，另一端也可找到一个交点，于是形成一个面上的六个点，连接构成六边形．最简单的就是寻找对面中点与夹线中点，形成一个正六边形，这是一例．因为正方形有六个面，最多能截取六条线，所以，是可能的最多边，以上方法至少找到了一个实例六边形，因此即为该解．故答案为：．解析:若，互为倒数，，互为相反数，．则，，，当时，；当时，；则的值为或．解析:本题的关键是找出从第行开始，每行的左边第个数的排列规律：，，，，，进而得出第行左边第个数是，由此得解，从第行开始：第行：左边第个数是；13.六14.或15.16.（1）（2）第行：左边第个数是；第行：左边第个数是；第行：左边第个数是；，第行：左边第个数是．故答案为：．解析:原式．解析:原式，，当，时，原式．解析:∵，，∴不合格的有瓶，∴合格的有瓶，答：这瓶样品中合格的有瓶．（克），答：这批样品总质量比标准质量多，多克．．17.．18.（1）这瓶样品中合格的有瓶．（2）这批样品总质量比标准质量多，多克．19.12（1）（2）（1）解析:∵，是中点，∴，∵、分别为、的中点，∴，，∴．∵、分别为、的中点，∴，，∴，∵，∴．故不发生变化．∵、分别平分、，∴，，∴．解析:窗帘的面积为：个半圆的面积之和．半圆的半径，则面积，∴窗帘的面积为．∵窗户的面积，∴能照进阳关的面积为．12（1）不发生变化，证明见解析．（2），证明见解析．20.（1）; （2）．（3）小明的设计照进阳光面积更大，大．21.小（2）（3）（1）（2）（3）当，，时，，即窗户能射进阳光的面积为．小明的设计窗帘的小圆半径，则，则，，∴小明的设计照进阳光面积更大，大．解析:第个算术：；第个算术：；第个算术：；第个算术：；∴第个算术：．．．小明小明小 小 小明（1）; （2）．（3）．22.（1）1（2）23.（1）12（2）（3）解析:设点表示的数为，∵点是的奇异点，∴，∴，，，∴点表示的数是．设点表示的数为，∵点在，之间，且点是的奇异点，∴，∴，，，，∴点表示的数为．设点表示的数为，∵点在右侧，且点是奇异点，∴，∴，，，，∴表示的数为．设点表示的数为，∵奇异点，∴，①在之间时，，2．（3）能，或．，，；②在点右侧时，，，，；③在左侧时，，不存在．综上，点可以是奇异点，点表示的数是或．。
【百强名校】广东省深圳实验学校2020-2021学年第一学期高一期中考试数学试卷
2020~2021学年广东深圳实验学校高一上学期期中数学试卷一、选择题（本大题共12题，每小题5分，共计60分） 1.方程组2219x y x y +=⎧⎨-=-⎩的解集是（ ）. A.(4,5)B. (5,4)-C. {(5,4)}-D.{(4,5)}-2.下列各组函数中，表示同一函数的是（ ）. A.1,x y y x== B.33,y x y x ==C.211,1y x x y x =-⨯+=-D.2||,()y x y x ==3.图中阴影部分所表示的集合是（ ）.A.[]C ()U A C B ⋂⋃B.()()A B B C ⋃⋃⋃C.()()C U A C B ⋃⋂D.[]C ()U B A C ⋂⋃4.已知0.60.70.20.8,0.8, 1.2a b c ===，则, , a b c 三者的大小关系是（ ）．A.b d c >>B.c a b >>C.a b c >>D.c b a >> 5.已知函数(2)y f x =+定义域是[3,2]-，则(21)y f x =-的定义域是（ ）. A.50,2⎡⎤⎢⎥⎣⎦B.[1,4]-C.31,2⎡⎤-⎢⎥⎣⎦D.12,2⎡⎤-⎢⎥⎣⎦6.A. 最小值B. 最大值C. 最小值D. 最大值若(),()x g x ϕ都是奇函数，()()()2f x a x bg x ϕ=++在(0,)+∞上有最大值6，则()f x 在(,0)-∞上有（ ）． A.最小值6-B.最大值6-C.最小值2-D.最大值2-7.函数2()(31)4f x x a x a =+++在[],1-∞上为减函数，则实数a 的取值范围是（ ）．A.1a ≤-B.1a ≥-C.1a >-D.1a <-8. 若不等式20ax bc c ++>的解集是1,22⎛⎫-⎪⎝⎭，则20cx bx a ++<的解集是（ ）．A.1(,2),2⎛⎫-∞⋃+∞⎪⎝⎭B.1,(2,)2⎛⎫-∞-⋃+∞ ⎪⎝⎭C.1,22⎛⎫-⎪⎝⎭D. 12,2⎛⎫- ⎪⎝⎭9. 对于函数31()31x x f x -=+，下列描述正确的选项是（ ）．A.减函数且值域为(1,1)-B.增函数且值域为(1,1)-C. 减函数且值域为(,1)-∞D.增函数且值域为(,1)-∞10.若集合{}2|(2)210A x k x kx =+++=有且仅有1个真子集，则实数k 的值是（ ）． A.2-B.1-或2C.1-或2±D.1-或2-11.已知()f x 函数是定义在()()3,00,3-⋃上的奇函数，当103x <<时，()f x 的图象如右图所示，则不等式()?0f x x ->的解集是（ ）． A.(1,0)(1,3)-⋃B.(3,1)(1,3)--⋃C.(1,0)(0,1)-⋃D.(3,1)(0,1)--⋃12. 已知映射:f A B →，其中A B ==R ，对应法则221:2x xf x y +⎛⎫→=⎪⎝⎭，若对实数m B ∈，在集合A 中存在元素与之对应，则m 的取值范围是（ ）． A.02m <≤ B.2m ≥ C.3m > D.2m ≤ 二、填空题（本大题共4题，每小题5分，共计20分）13.若函数2(2)2f x x x +=-，则()3f = ．14.某班有学生45人，其中体育爱好者33人，音乐爱好者24人，还有4人既不爱好体育也不爱好音乐，则该班既爱好体育又爱好音乐的人数为 ． 15.函数31y x x =--得值域为 ．16.已知(3)1,1(),1xa x x f x a x -+<⎧=⎨≥⎩，满足对任意，都有成立，那么12x x ≠，都有()()12120f x f x x x ->-成立，那么a 的取值范围是 ．三、解答题（本大题共6题，共计70分） 17.解决下列问题：（1）求值：0.75202312018(2)816-⎛⎫+--+ ⎪⎝⎭．（2）已知14x x -+=，求33x x -+的值． 18.盐田港与深汕港相距约100km ，在两地连线之间距盐田港x km 处拟再建一核电机组专给两港供电，为保证港区安全，核电机组距两港距离均不得少于10km ，已知供电费用与供电距离的平方以及供电量之积成正比，比例系数0.25k =．若盐田港供电量为20亿度月，深汕港为10亿度/月．（1）把月供电总费用y 表示成x 的函数，并写出其定义域． （2）核电机组建在距盐田港多远，才能使供电费用最小． 19.已知集合2{|514}A x y x x ==--，2{|416}B y y x ==-+-，{|121}C x m x m =+≤≤-. （1）求A B ⋂.（2）若A C A ⋃=，求实数m 的取值范围．20. 已知()f x 是定义在R 上的偶函数，且当0x ≤时，1()21x f x +=+．（1）求()f x 的解析式．（2）在所给的坐标系内画出函数()f x 的图象，（不需列表），并直接找出方程()f x m =没有实根时，实数m 的取值范围．21.已知定义在区间()0,+∞上的函数()f x ，对任意(),0,a b ∈+∞均有，且()()a f f a f b b ⎛⎫=- ⎪⎝⎭，当1x >时，()0f x <．（1）求()1f 的值，（2）判断()f x 的单调性并予以证明．（3）若()31f =-，解不等式()212f x -≥-．22.已知函数2()(2),(1)2f x x a x b f =+++-=-，且对于,()2x f x x ∈≥R 恒成立．（1）求函数()f x 的解析式． （2）设函数()()4f x g x x=-． ①证明：函数()g x 在[]1,+∞上是增函数．②是否存在正实数,m n ，且m n <，当m x n ≤≤时函数()g x 的值域为113,3m n ⎡⎤--⎢⎥⎣⎦．若存在，求出,m n的值，若不存在，则说明理由．。
广东省深圳实验学校中学部2023-2024学年七年级上学期期中阶段检测英语试卷
深圳实验学校中学部2023-2024学年度第一学期阶段检测七年级英语试卷考试时间：90分钟试卷满分：100分【说明】：请考生在答题卷指定区域按要求规范作答，考试结束上交答题卷。
第Ⅰ卷第一部分听力（10分）Ⅰ. 听录音，选出你所听到的句子。
句子念两遍。
（共5小题，每小题0. 5分）( ) 1. A. Spring is the most beautiful season in Harbin.B. Winter is a beautiful season in Harbin.C. Winter is the most beautiful season in Harbin.( ) 2. A. He is seldom late for school.B. He is always late for school.C. He is never late for school.( ) 3. A. We have a good time at the party.B. We have a good rest at the party.C. We have a good dinner at the party.( ) 4. A. Many people are worried about air pollution in our city.B. Many people in our city are worried about air pollution.C. Many people in our city worry about air pollution.( ) 5. A. It’s exciting to go swimmi ng in the sea in summer.B. It’s interesting to swim in the sea in summer.C. It’s nice to go swimming in the sea in summer.Ⅱ. 听句子，根据所听内容选择最佳应答语。
广东省深圳市实验学校2020-2021学年第一学期期末考试七年级语文试题
深圳实验学校2020~2021 学年度第一学期期末统考初一年级语文试卷一、基础（24 分）学校开展“有朋自远方来”为主题的综合性实践活动，请根据要求完成各题。
1. 小深在收集关于交友的诗词文章时，看到这样一段话：（2 分）当你在茫茫黑夜前行，抬头看见路边有一盏照亮前路，那缥miǎo的柔光款款降落，你的心头是否为之一暖？当你在灼心的烈日下蹒．跚，忽见不远处荷塘上的菡萏，你的心田可有一阵清爽？当你在失败的雨天里抽噎．，有一把伞予你bì护，你的心间是否架起一道彩虹？那光、那荷、那伞，叫做友情。
（1）给加点词注音：蹒．跚（）抽噎．（）（2）看拼音写汉字：缥miǎo（）bì护（）2. 在组内研读资料之后，同学们分享了自己的“友情故事”，请你看看同学们分享的内容，用词恰当且语言得体的是（）（3 分）A. 好朋友应该互相支持、肯定，当我内心不确定时，需要朋友随声附和。
B. 有一次我因为打球骨折，手臂都麻木不仁了，多亏了朋友的帮助，才及时得以治疗。
C. 他是我最信任的朋友，头脑灵活，处事周到，每次我遇到困难写信垂询，都能得到很有启发的回复。
D. 在好朋友的帮助下，我终于解出了这道题，我不禁眉开眼笑，说：“谢谢你教我，我一下子就懂了！”3. 以下是班级某小组关于探讨网络交友方式的总结，没有语病的一句是（）(3 分)A. 随着新媒体的发展，使人们的交友方式发生了变化。
B. 能不能将心比心，是交到好朋友的关键。
C. 我们班同学一起精心策划、组织、实施了自我风采展示活动。
D. 在网络上交友时，切忌不要轻易泄露个人重要信息。
4. 下列关于“友情”的一段话让小深印象深刻,请把句子组成语段的顺序排列正确（）(3 分)①所以，若遇到灵魂投契的朋友，真是让人喜出望外。
②人的灵魂有倾诉的需求和分享的需求。
③只有当这种倾诉和分享达到无话不谈的程度，才能真正排解寂寞。
④不过两颗灵魂的投契和共鸣又何其罕见，几率是很小很小的。
2020-2021深圳实验学校初一数学上期中试卷带答案
【解析】 【分析】 先找出绝对值不大于 4 的整数，再求它们的乘积． 【详解】 解：绝对值不大于 4 的整数有，0、1、2、3、4、﹣1、﹣2、﹣3、﹣4，所以它们的乘积为 0． 故选 B． 【点睛】 绝对值的不大于 4 的整数，除正数外，还有负数．掌握 0 与任何数相乘的积都是 0．
3．C
解析：C 【解析】 【分析】 【详解】
试题分析：设第一天走了
x 里，则根据题意知 x 1
1 2
1 22
1 23
1 24
1 25
378 ，解得
x=192，故最后一天的路程为
1 25
192
6
里.
故选 C
4．B
解析：B
【解析】
【分析】
根据有理数的大小比较法则比较即可．
【详解】
∵0>−4，2>−4，−5<−4，−2.5>−4，
∴比−4 小的数是−5，
B．12 里
C．6 里
4．下列各数中，比-4 小的数是（ ）
D．3 里
A． 2.5
B． 5
C．0
D．2
5．观察等式：2＋22＝23－2；2＋22＋23＝24－2；2＋22＋23＋24＝25－2；已知按一定规律
排列的一组数：250、251、252、、299、2100，若 250＝a，用含 a 的式子表示这组数的和是
【参考答案】***试卷处理标记，请不要删除
一、选择题
1．B 解析：B 【解析】 【分析】 此题可设原价为 x 元，分别计算出两超市降价后的价钱，再比较即可． 【详解】 设原价为 x 元，则甲超市价格为 x×（1-10%）×（1-10%）=0.81x 乙超市为 x×（1-20%）=0.8x，
广东省深圳市深圳实验学校中学部2020-2021学年七年级阶段检测英语试题(Word版)
深圳实验学校中学部2020-2021 第一学期初一年级阶段检测英语试卷考试时间:90 分钟满分:100 分第I 卷第一部分听力（10 分）Ⅰ.听录音，选出你听到的句子。
每小题念两遍。
（共 5 个小题，每小题 0.5 分）( ) 1. A Let’s go for a picnic tomorrow.B. Let’s go for a picnic somewhere.C. Let’s go for lunch somewhere.( ) 2. A. My father is very happy these days.B. My father is very free these days.C. My father is very busy these days.( ) 3. A. There are many famous places in Beijing.B. There are many interesting places in Beijing.C. There are many interesting places in Shanghai.( ) 4. A. I’m going to work as a doctor after graduation.B. I’m going to work as a nurse after graduation.C. I’m going to work with a doctor after graduation.( ) 5. A. My father took me to the school yesterday.B. My father took me to the cinema yesterday.C. My father will take me to the cinema tomorrow.Ⅱ.听句子,根据所听内容选择最佳应答语，每小题念两遍。
2020-2021学年深圳实验中学中学部高三英语上学期期中考试试卷及参考答案
2020-2021学年深圳实验中学中学部高三英语上学期期中考试试卷及参考答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AWhen it comes to the greatest inventions of the world, China’s name is sure to be mentioned several times. There are hundreds of things which were invented by the Chinese.AlcoholShocked? I was because when they said alcohol I thought about either the US or the UK. China had never crossed my mind. In China, alcohol was made by two legendary persons named Yi Di and Du Kang who belonged to the Xia Dynasty. This period was about 2000 BC - 1600 BC. Research says that in ancient China, beer with 4% alcoholic content was widely consumed by people.TeaChina is the proud inventor of tea which was first drunk by Shen Nong, a Chinese emperor around 2737 BC. Tea production was rapidly developed, making tea a popular drink during the Tang and Song Dynasties.The Mechanical ClockHave you ever wondered what on earth we would be doing without any idea of time? A clock really is an invention without which things were incomplete. The credit of making the first mechanical clock goes to ancient China. The first mechanical clock was invented by Yi Xing in the Tang Dynasty. This was during 618 and 907.Silk FabricSilk, the favorite fabric of many girls out there, is also a Chinese invention. Although we all know that silk is made by silkworms, it was Chinese people who first invented a way to harvest the silk and then use it to make clothes. The oldest silk which has been found so far is in Henan Province and dates back to 3630 BC.1.We can learn from Paragraph 2 that ________.A.people in the US like alcoholB.beer was popular in the Xia DynastyC.Yi Di and Du Kang invented alcohol by accidentD.the author didn’t know alcohol is a Chinese invention2.The author asks the question in Paragraph 4 to show ________.A.ancient Chinese inventors were wiserB.many things in our lives are incompleteC.ancient Chinese people never wasted timeD.the invention of the mechanical clock is important3.Which of the following invention has a longer history?A.Tea.B.Alcohol.C.Silk fabric.D.The mechanical clock.BBorn in 1954, Oprah Winfrey is best known for her multi-award-winning talk show as the most influential woman in the world. It's no surprise that her recognition can bring overnight sales fortune that defeats most, if not all, marketing campaigns. The star features about 20 products each year on her "Favorite Things" show. There's even a term for it: the Oprah Effect.Her television career began unexpectedly. When she was 16 years old, she had the idea of being a journalist to tell other people's stories in a way that made a difference in their lives and the world. She was on television by the time she was 19 years old. And in 1986 she started her own television show with a continuous determination to succeed at first.TIME magazine wrote, "People would have doubted Oprah Winfrey's swift rise to host of the most popular talk show on TV. In a field dominated by white males, she is a black female of big size. As interviewers go, she is no match for Phil Donahue. What she lacks in journalistic toughness, she makes up for in plainspoken curiosity, rich humor and, above all understanding. Guests with sad stories to tell tend to bring out a tear in Oprah's eye. They, in turn, often find themselves exposing things they would not imagine telling anyone, much less a national TV audience.""I was nervous about the competition and then I became my own competition raising the bar every year, pushing, pushing, pushing myself as hard as I knew. It doesn't matter how far you might rise. At some point you are likely to fall if you' re constantly doing what we do, raising the bar. If you' re constantly pushing yourself higher, higher the law of averages, you will at some point fall. And when you do, I want you to know this, remember this: there is no such thing as failure. Failure is just life trying to move us in another direction" as Oprah addressed graduates at Harvard on May 30.4. What does the Oprah Effect refer to in the first paragraph?A. the influence on talk show hostsB. the power of Oprah's opinions.C. the effect on a business.D. the audience of Oprah's talk show.5. What can be inferred about Oprah's television career?A. She must have been challenged a lotB. She gained fame as planned.C. It lives up to her parents' expectation.D. She once gave up on her choice.6. What message did Oprah give to Harvard graduates?A. Success comes after failure.B. Pushing physical limits makes no senseC. Aiming higher hurtsD. Failure is part of life.7. Which of the following best describes Oprah Winfrey?A. Friendly.B. HumorousC. Determined.D. PatientCI cried the first time I saw the Notre Dame（巴黎圣母院）years ago. I'd waited my entire life to see this great French architecture, and experienced it in its full glory on a bright sunny day. Last night, I again cried for the centuries-old church while watching it burn.I hadn't expected to spend my evening that way. My friend and I were having dinner at a cafe a block or so away from the Notre Dame, choosing to skip going inside with the intention to go back the next day.However, we heard that it caught fire, so we left the cafe and ran towards the church, following heavy smoke from it, and soon we joined a nearly silent crowd. Some were praying, some were crying, but most were staring in disbelief at the disaster happening before us. The fire continued to get worse. About 400 firefighters were working to control the fire. We could see their flashlights shining as they inspected the front from a balcony.The Notre Dame is part of the heartbeat ofParis, I reflected on the experiences I've had there, from attending a bread market out front to admiring the beautiful windows and architecture inside. It is a spot that helps makeParismagical. And here we were, watching it burn down. It was too much to handle, but it was impossible to look away.About 9：30 pm, the gathered crowd spontaneously（自发地）began to sing Hymns（圣歌）to the church. We sang along with the group, feeling at once less like tourists and more like members of them. I hadn't imagined all that before.For hundreds of years, the Notre Dame hasseen the most joyous and the most terrible moments in the lives of both France and her people. And when everyone was able to become one emotional force, it showed that even in her darkest hour, the Notre Dame was still there to bring us all together.8. Why did the author cry for the Notre Dame for the first time?A. She was touched by its greatness.B. She was sorrowful to watch it burn.C. She was regretful for missing its glory.D. She was excited about French cultures.9. What was the author doing when the Notre Dame caught fire?A. Heading for a faraway cafe.B. Visiting a church with a friend.C. Eating nearby with a friend.D. Wandering along the street alone.10. What can we know about the fire scene?A. People expressed their sadness in different ways.B. People were nervously rushing in different directions.C. Hundreds of volunteers joined in putting out the fire.D. Firefighters kept people away with shining flashlights.11. What impressed the author most?A. The church allowed visitors to gaingreat experiences.B. Many foreign tourists became members of the church.C. The church survived disasters for hundreds of years.D. People were brought together to sing to the church.DOnce small farmers in Masii, a remote village in Kenya, have picked their crops, all they can do is wait until a buyer trucks through. The system works fairly well for beans and corn, but mangoes-the area’s other main crop-spoil (腐烂) more quickly. If the trader is late, they rot.However, a simple coating could change that. A company, SmartTech, has created a product that doubles the shelf life of fresh produce, enabling farmers to access far-off, larger markets. More time forfresh produce on grocers’ shelves also means less food waste-a $2.6 trillion problem, according to the United Nations’ Food and Agriculture Organization (FAO).James Rogers, CEO of SmartTech, wanted to solve the problem for food much in the same way that oxide barriers preventing rust (锈) have achieved for steel. Fortunately, researchers have found when plants made the jump from water to land, they developed cutin(蜡质), a barrier which is made of fatty acids that link together to form a seal around the plant, helping keep water in.The cutin was such a grand strategy that today you’ll still find it across the plant kingdom. SmartTech discovered through researches that an orange can last longer than a strawberry not so much because of thethickness of its skin, but because of the difference in the arrangement of those cutin molecules (分子)on the surface. After extensive trials, Rogers and his team developed a natural and tasteless protective coating from plant material-stems, leaves and skins. The product extends the sweet spot between ripening and rot. And best of all, the treated produce doesn’t require refrigeration.“SmartTech has huge potential to turn poor farmers in Africa into commercial farmers,” says Rogers. “That means more money in pockets, and more food in stomachs.” But whether the company can cost-effectively reach small farmers in far-off areas still remains a challenge.12. The author mentions the small farmers in Kenya to ________.A. stress their need for preserving produceB. show their challenge in harvesting cropsC. express their wish to reach larger marketsD. evaluate their loss caused by slow transport13. What can we learn about SmartTech’s product?A. It is financially supported by FAO.B. It is intended to replace refrigeration.C. It is designed to thicken produce’s skin.D. It is based on plants’own defence system.14. What will James Rogers probably focus on next?A. How to expand farms.B. How to earn more money.C. How to produce more tasty food.D. How to profit farmers in remote area.15. The main purpose of the passage is to ________.A. promote a productB. present a technologyC. advertise SmartTechD. introduce James Rogers第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年深圳实验中学中学部高三英语上学期期中试卷及答案解析
2020-2021学年深圳实验中学中学部高三英语上学期期中试卷及答案解析第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项ASongkran, ThailandThis festival marks the Thai New Year, which is celebrated in the second week of April. This is the hottest time of the year in Thailand, so it makes sense that the biggest Songkran tradition is to throw water on people. Thais of all ages join in water fights, using buckets, hoses (软管)and water guns to celebrate the event.Boryeong Mud Festival, South KoreaDon't expect to come home clean after experiencing the Boryeong Mud Festival in South Korea. Famous for its mineral-rich mudflats, visitors rush to Boryeong in July to make themselves in mud, swim in grey pools and enjoy the party. There are even mudslides and a mud skiing competition for those who are seeking the extreme mud adventure!La Tomatina, SpainThe festival dates back to a parade in which some naughty teenagers knocked one performer off his stilts (高跷)and caused a fight of throwing vegetables accidentally. It was once banned until 1957 when the locals held a protest with a funeral. They carried a coffin containing a huge tomato as bands played a funeral march. In the following decades, La Tomatina has become a popular event. If you join the event, be aware that you squash (压扁) the tomato before throwing it. Have a great time but avoid causing any injury.Dia de los Muertos, MexicoBeginning at the midnight of October 31 and lasting through November 2,it is a festival when families gather together to remember those loved ones who have died, aiming to help them on their spiritual journey. On these days, Mexican families prepare special tables in their homes. On top of them they'll put photos of the dead and their favorite food. They also visit the graves of their beloved ones to show their respect to the dead.1.If you want to experience a special new year in a country, you can choose to visit ________.A.ThailandB.South KoreaC.SpainD.Mexico2.What may happen to you as a visitor in La Tomatina?A.You can perform stilts.B.Your can play funeral music in bands.C.You may be covered with mud.D.You may be attacked with tomatoes.3.Which festival is similar to the Tomb Sweeping Festival in China?A.Songkran.B.Boryeong Mud Festival. Tomatina.D.Dia de los Muertos.BFrom Mozart to Metallica, tons of people enjoy listening to various types of music while they paint, write, or draw. Most believe that music helps increase creativity, but an international study conducted by English and Swedish researchers is challenging that view. The study results wereechoedby scientists fromLancasterUniversity, and theUniversityofGavle, saying their findings show music actually weakens creativity.To reach their conclusions, researchers had volunteers complete verbal problems designed to inspire creativity while sitting in a quiet room, and then again while music played in the background. They found that background music significantly weakened the volunteers’ ability to complete tasks connected with verbal creativity. The team also tested background noises like those commonly heard in a library, but found that such noises had no influence on subjects’ creativity.The tasks were simple word games. For example, volunteers were given three words, such as dress, rise, and flower. Then, they were asked to find a single word connected with all three that could be combined to form a common phrase or word. The single word, in this case, would be “sun” (sundress, sunrise, sunflower). Volunteers completed the tasks in either a quiet room, or while listening to two different types of music: rock music or light music“We found strong evidence of weakened performance when playing background music in comparison to quiet background conditions,” says co-author D. Neil McLatchie ofLancasterUniversity. He and his colleagues find that music negatively influences the verbal working memory processes of the brain, preventing creativity. Also, as far as the library background noises having seemingly no effect, the study’s authors believe that was the case because library noises create a “regular state” environment that doesn’t affect concentration.“To conclude, the findings here challenge the popular view that music increases creativity, and instead show that music, whatever type it is, is always a disadvantage for creative performance in problem solving,” the study reads.4. The underlined word in Paragraph 1 can be replaced by ________.A. challengedB. acceptedC. doubtedD. heard5. What were the volunteers asked to do in the study?A. To play music.B. To combine given words.C. To create new words.D. To connect words with music.6. What can we infer from the study?A. Quiet background inspires creativity best.B. Library noise does no harm to creativity.C. Music has a bad effect on language ability.D. Music types matter in creative performance.7. Which is the main idea of the passage?A. Quiet Environments Prevent Concentration.B. Background NoiseAffects Concentration.C. Composing Music Weakens Creativity.D. Listening to Music Reduces Creativity.CWilliam had worked hard to pass the exams to enter high school. When the term began, however, his father told him that there was no money to pay for his school fees because of the summer drought. Still, William wanted to learn.He made the village library his school. One day, he found a book calledUsing Energy. On the book’s cover was a picture of windmills, tall steel towers with blades (叶片) spinning like giant fans. He learned that wind—something of which his hometown had plenty—could produce electricity.He couldn’t help picturing his own windmill in mind, but collecting the parts and tools he needed would take months. In a junkyard, he dug through piles of used metal, old cars, and worn-out tractors, searching for anything that might help him construct his machine. He made four-foot-long blades from plastic pipe, which he melted over a fire, flattened out, and hardened with bamboo poles.Earning some money, he paid a blacksmith to attach the piston (活塞) to the pedal sprocket (踏板链轮) of an old bicycle frame. This would be the axle (轮轴) of the windmill. When the wind blew, the spinning blades would turn the bicycle wheel and spin a small dynamo (发电机), donated by his friend.When he had collected all the parts, William began putting them together. He fixed the blades to the tractor fan he found, using washers (垫圈) he’d made from bottle caps. Next he pushed the fan onto the piston joint to the bicycle frame. With the help of his two best friends, Williambuilt a 16-foot-tall tower from trunks of trees and lifted the ninety-pound windmill to the top.The big moments eventually came. He climbed up the tower and connected two wires that held a small bulb. As the wind whipped around him, the blades began to turn, slowly at first, then faster and faster. The light bulb flickered (闪烁), then flashed to life. The crowd cheered from below. “Wachitabwina (well done)!”William’s machine now powered his house. And the story of the boy who’d built a power-generating windmillto rescue his family from the drought spread across the Internet.8. After readingUsing Energy, what did William decide to do?A. Make use of wind.B. Enter a high school.C. Build a village library.D. Learn to survive a drought.9. According to Para.3, which of the following word can best describe William?A. Humorous.B. Determined.C. Cooperative.D. Friendly.10. What can you learn about William’s machine?A. It was built by villagers.B. It worked at the first attempt.C. It took him years to complete it.D. It was made from metal materials.11. What is the besttitle for the passage?A. Winds Of HopeB. Ideas Worth SpreadingC. Learning from ExperienceD. Windmills for VillagesDThese days, football is one of the most popular sports in the world. Given that Neil Armstrong wanted to take a football to the Moon, we could even say that it is also the most popular sport out of this world! The history of the game goes back over two thousand years to Ancient China. It was then known as cuju (kick ball), a game using a ball of animal skins with hair inside. Goals were hung in the air. Football as we know it today started inGreat Britain, where the game was given new rules.That football is such a simple game to play is perhaps the basis of its popularity. It is also a game that is very cheap to play. You don’t need expensive equipment; even the ball doesn’t have to cost much money. All over the world you can see kids playing to their hearts’ content with a ball made of plastic bags.Another factor behind football’s global popularity is the creativity and excitement on the field. It is fun enough to attract millions of people. You do not have to be a fan to recognize the skill of professional players or to feel the excitement of a game ending with a surprising twist.What’s more, football has become one of the best ways for people to communicate: it does not require words, but everyone understands it. It breaks down walls and brings people together on and off the field.“Some people believe football is a matter of life and death, ...” said Bill Shankly, the famous footballer andmanager. “I can tell you with certainty it is much, much more important than that.” This might sound funny, but one only has to think about the Earth to realize that our planet is shaped like a football.12. What can we know from paragraph one?A. Some people like to play football on the Moon.B. The game called cuju was given new rules today.C. Cuju is different from football as we know it today.D. Many people like playing a ball made of plastic bags.13. According to the author, there are ________ reasons why football became so popular in the world.A. 3B. 4C. 5D. 614. What can be inferred from the last paragraph?A. Football is round.B. Football is more than just a sport.C. Our planet is shaped like a football.D. What Bill Shankly said sounds funny.15. What’s the author’s purpose in writing the passage?A. To talk about the history of football.B. To express his/her love of football.C. To explain why football is such a popular game.D. To prove that he/she is a professional football fan.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年深圳实验中学中学部高三英语期中考试试题及答案
2020-2021学年深圳实验中学中学部高三英语期中考试试题及答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项ARome can be pricey for travelers, which is why many choose to stay in a hostel (旅社). The hostels in Rome offer a bed in a dorm room for around $25 anight, and for that, you’ll often get to stay in a central location (位置) with security and comfort.Yellow HostelIf I had to make just one recommendation for where to stay in Rome, it would be Yellow Hostel. It’s one of the best-rated hostels in the city, and for good reason. It’s affordable, and it’s got a fun atmosphere without being too noisy. As an added bonus, it’s close to the main train station.Hostel Alessandro PalaceIf you love social hostels, this is the best hostel for you in Rome. Hostel Alessandro Palace is fun. Staff members hold plenty of bar events for guests like free shots, bar crawls and karaoke. There’s also an area on the rooftop for hanging out with other travelers during the summer.Youth Station HostelIf you’re looking for cleanliness and a modern hostel, look no further than Youth Station. It offers beautiful furnishings and beds. There are plenty of other benefits, too; it doesn’t charge city tax; it has both air conditioning and a heater for the rooms; it also has free Wi-Fi in every room.Hotel and Hostel Des ArtistesHotel and Hostel Des Artistes is located just a 10-minute walk from the central city station and it’s close to all of the city’s main attractions. The staff is friendly and helpful, providing you with a map of the city when you arrive, and offering advice if you require some. However, you need to pay 2 euros a day for Wi-Fi.1.What is probably the major concern of travelers who choose to stay in a hostel?fort.B.Security.C.Price.D.Location.2.Which hotel best suits people who enjoy an active social life?A.Yellow Hostel.B.Hostel Alessandro Palace.C.Youth Station Hostel.D.Hotel and Hostel Des Artistes.3.What is the disadvantage of Hotel and Hostel Des Artistes?A.It gets noisy at night.B.Its staff is too talkative.C.It charges for Wi-Fi.D.It’s inconveniently located.BJoshua Nelson, 18, fromMissouri, is graduating fromSt. CharlesWestHigh Schoolthis week and will be attendingSoutheastMissouriStatein the fall. He had saved upmoney to pay for his tuition, but when he received the college's President's Scholarship, he decided to take his savings and donate it to other students in need.“It comes from my family education and faith," Nelson said. "I've always lived by strong principles as far as being a cheerful giver andhaving an open handwhen it comes to giving back so I feel like that really motivated me.”SEMO's President's Scholarship is the school’s most celebrated, and is only awarded to five top students annually. Nelsonsaid he sat down and outlined how a scholarship could work to help future students who need financial assistance for college. Originally the plan was to give away $ 1,000 the one time, but then he met up with his counselor (顾问), Yolanda Curry, to work outa game plan.“I wasn't expecting it at all!” Curry said. "He told me he had a great idea and wanted to share it with me. I could tell he was really excited.Nelson, in association with his high school, set up the Joshua Nelson Leaders In Action Scholarship fund. Each year, $1,000 will be awarded to a senior. The money will come from donations, of which there have been $16,000 so far — for a total of $17,435 at last count, according to the school. With the money already in the fund, there's enough to give out a scholarship each year for over a decade. The first scholarship was awarded on June 1 to Darrell Montalvo-Luna. As the first recipient, his scholarship was $2,000.“Joshua has the heart of a servant leader. He leads by example and he's genuinely excited when good things happen for other people," Curry said. "He's an encouragement — he's good at building others up and does what he can to help encourage and motivate those around.4. What did Nelson's initial donation come from?A. His scholarship.B. His savings.C. His pocket money.D. His wages.5. What does the underlined phrase "having an open hand" in paragraph 2 mean?A. Ambitious.B. Courageous.C. Generous.D. Cautious.6. How did Curry feel when hearing Nelson's idea?A. Shocked.B. Confused.C. Excited.D. Delighted.7. What can be inferred about the Joshua Nelson Leaders In Action Scholarship fund?A. It never supports high school students.B. It was set up more than ten years ago.C. It was founded by Nelson and Curry.D. It is going very smoothly.CThe year 2020 will mark the beginning of the decade of the yold, or the “young old”, as the Japanese call people aged between 65 and 75. The traditional retirement age is 65. One might therefore expect peak retirement. By continuing to work, and staying socially engaged, the yold will change the world, as they have done several times before at different stages of their lives.The yold are more numerous, healthier and wealthier than previous generations of seniors. The yold are busier, too. In short, the yold are not just any group of old people. They are challenging the traditional expectations of the retired as people who wear slippers and look after the grandchildren. That will influence consumer, service and financial markets.The over-60s are one of the fastest-growing groups of customers of the airline business. The yold are vital to the tourism industry because they spend much more, when taking a foreign holiday, than younger adults.But for all this to happen,three big things will have to change, under pressure from the yold themselves. The most important is public attitudes towards older people, and in particular the expectation that the old ought to be putting their feet up and quietly retiring into the background. Then, government policies will have to change, too. The retirement age in many rich countries is still below the age to which many people want to work. The effective retirement age (the age at which people actually leave the workforce) is usually even lower. Third, higher numbers of healthy yold people will require drastic changes in health spending. Most diseases of ageing are bestmetwith prevention and lifestyle changes. But only about 2%~3% of most countries’ health-care spending goes on prevention. That will have to rise, because although the yold will constitute a bulge of comparative health and activity over the next decade, by 2030 they will hit 75 and enter a long period of decline for which few rich countries are ready.8. What kind of people are the yold exactly?A. They are workaholics.B. They are full of energy.C. They enjoy being focused on.D. They like staying socially engaged.9. Why do the yold contribute to tourist industry?A. They like traveling more.B. They have more money.C. They consume more on travel.D. They have much free time.10. What’s the author’s attitude toward health-care spending on prevention?A. Unsatisfied.B. Subjective.C. Neutral.D. Active.11. What does the underlined word “met” in the fourth paragraph mean?A. dealt withB. come acrossC. satisfiedD. experienced.DYou don't generally expect to put yourself in the public eye whenyou go on vacation. However when a British couple, Jessica and Edward, flew to Crete, they found themselves attracting a lot of attention after coming across a large sum of money in the street.At first, their Crete vacation hadn't been anything outside of the norm. However, it was as they were exploring the souvenir shops that everything changed. The couple were just walking down the street when Jessica suddenly kicked something lying on the ground. It looked a bit like a make-up bag and so they assumed that someone had lost it.Without hesitation, Jessica picked up the bag and opened it. She was shocked to see a lot of money in it-a total of 7,100 Euros. There was probably a lot they could do with all that money. However, the couple didn't have it in them to steal what belonged to someone else. Going to the police was the first thought that came to mind when Jessica saw the money. She didn't consider that there was any other choice, so the couple handed over the money to the local police.The police found the owner, an elderly woman, and informed the couple that the woman wanted to meet them. When they eventually met at the police station, the woman was so overcome with emotion that she wouldn't stop hugging and blessing them, although they insisted they were just doing the right thing.News of what the couple had done quickly made its way around the island. The locals wanted to show them their gratitude. This included receiving free taxi rides and even an offer to have their hotel room upgraded. The couple appreciated the kindness, but it was all getting to be a bit too much. They just wanted to have a normal vacation.They are probably hoping that they fly a little more under the radar during their next vacation. There's onlyso much attention that these two lovebirds can handle.12. What is the first reaction of the couple after finding the money?A. They decided to do all with that money.B. They bought something in souvenir shops.C. They turned it over to the local police station.D. They tried to look for the owner by themselves.13. Which o£ the following can best describe the locals in Crete?A. Polite and hard-working.B. Kind and grateful.C. Sociable and honest.D. Rich and determined.14. Why do the couple hope to “fly a little more under the radar" in the last paragraph?A. They want to take fewer flights.B. They can't handle more radars.C. They hope to gain less attention.D. They don't have more money.15. What can we learn from the text?A. Good things come to kind people.B. The early bird catchesthe worm.C. Behind bad luck conies good luck.D. Money is too much for strangers.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年深圳市实验学校高三英语上学期期中考试试题及参考答案
2020-2021学年深圳市实验学校高三英语上学期期中考试试题及参考答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AThe history ofpop art begins with abstract art. Pop art emerged from the foundation of abstract art in the 1950s, first gaining recognition in Great Britain, then establishing itself in the United States in the 1960s.In the 1930s and 1940s, abstract art was greatly popular, but people began to hate this art form. Most abstract art produced in this era could be found in art galleries or the homes of the elite(名流), not in the homes of everyday people. Pop art sprung onto the scene as the people's art.Some art critics say pop art is a rebellion against abstract art; others say it is an extension of abstract art. You can see elements of abstract art in many pop art prints, especially those that consist of a collage（拼贴画）of images. However, some pop art pieces have nothing to do with abstract art, looking more like a photo of a popular consumer item, which impressed people deeply.Richard Hamilton and Eduardo Paolozzi were two of the first contemporary pop art pioneers recognised in Great Britain. They were a part of the Independent Group, an organised group of British artists who wanted to challenge ruling modernist approaches to culture. They recognised the value of modern advertising and comic book images. They used these popular images in art as a social commentary, often building irony and humour into their artworks, thus creating a new form of art. These pieces were mass-produced and sold at affordable prices.When pop art took off in the United States, it expanded to include a celebration of kitsch and the common images found in movies and television. Andy Wharhol is perhaps the most famous American pop art artist, known for his prints of the actress Marilyn Monroe, the singer Elvis Presley and of Campbell's soup cans. Andy Wharhol was inspired by images from advertisements and common consumer items. He also made a series of paintings which showed images of car accidents.1. Why did people dislike abstract art?A. People found it hard to understand.B. Ordinary people couldn't afford it.C. People disliked enjoying it in galleries.D. It wasn't based on everyday life.2. What impression do pop art works leave on people?A. They are a rebellion against abstract art.B. They have many elements of abstract art.C. They are created so real.D. They are products of advertisers.3. The Independent Group was set up to ________.A. introduce a new art form to the worldB. develop modern advertising furtherC. create new comic book imagesD. make British culture better knownBChancellor of the Exchequer George Osborne said yesterday he would use the autumn spending review to increase Britain’s￡12bn-a-year aid budget towards humanitarian(人道主义的) causes in the wake of the European refugee(难民) crisis.Britainpromised to spend 0.7 percent of state general product on aid, meaning the budget could rise sharply by the end of the decade as the economy grows.Mr Osborne also said more of the aid budget could be given to help local government with housing costs for incomers, without breaking international guidelines.“We will use the foreign aid budget to help with the costs of these refugees. People ask about the pressure on public services; we’ll have extra money to help with that.”The government was unable to give a figure for how much aid money could be handed to local authorities: it would depend on how many refugees are accepted.David Cameron, Prime Minister, will set out his position on aid for refugees today. It is reported thatBritainwill accept at least 10,000 extra people from camps on theSyriaborder. He will use a statement in the House of Commons to flesh out plans — announced inMadridon Friday — to take more people.A report inThe Sunday Timesthat the UK would take 15,000 Syrians, not far from the 18,000 figure demanded by the EU, was described by “Downing Street” as a “guess”.TheUKwill offer to resettle Syrians directly from refugee camps inJordan,LebanonandTurkey— but not those who have already reached the EU.4. What is the main idea of the passage?A. Britain tried to help refugees.B. People doubtBritain’s kindness.C. Britain tried to explain its behavior.D. Refugees like to live inBritain.5. What can we infer from the first two paragraphs?A. Britain’s economy grows rapidly.B. Britain will use little of its money to help refugees.C. Most countries are not willing to help refugees.D.Britainwill use more money to help refugees.6. Which of the following statements is TRUE?A. Britain will use foreign money to help refugees.B. Britain helps refugees following international guidelines.C. Britain will use foreign money to develop themselves.D. People ask to use public service money to help refugees.7. What can we know from the passage?A. Britain can hold 10,000 refugees at most.B. The number of refugees to be received is uncertain.C. House of Commons declare a general plan.D.Britaincan hold 15,000 refugees at most.CLarry was on another of his underwater expeditions(探险)but this time, it was different. He decided to take his daughter along with him. She was only ten years old. This would be her first trip with her father on what he had always been famous for.Larry first began diving when he was his daughter’s age. Similarly, his father had taken him along on one of his expeditions. Since then, he had never looked back. Larry started out by renting diving suits from the small diving shop just along the shore. He had hated them. They were either too big or too small. Then, there was the instructor. He gave him a short lesson before allowing him into the water with his father. He had made an exception. Larry would never have been able to go down without at least five hours of theory and another similar number of hours on practical lessons with a guide. Children of his age were not even allowed to dive.After the first expedition, Larry’s later diving adventures only got better and better. There was never a dull moment. In his black and blue suit and with an oxygen tank fastened on his back, Larry dived from boats into the middle of the ocean. Dangerous areas did not prevent him from continuing his search. Sometimes, he was limited to a cage underwater but that did not bother him. At least, he was still able to take photographs of the underwater creatures.Larry’s first expedition without his father was in the Cayman Islands. There were numerous diving spots in the area and Larry was determined to visit all of them .Fortunately for him, a man offered to take him around thedifferent spots for rry didn’t even know what the time was, how many spots he dived into or how many photographs he had taken.The diving spots afforded such a wide range of fish and sea creatures that Larry saw more than thirty varieties of creatures.Larry looked at his daughter. She looked as excited as he had been when he was her age. He hoped she would be able to continue the family tradition. Already, she looked like she was much braver than had been then. This was the key to a successful underwater expedition.8. In what way was this expedition different for Larry?A. His daughter had grown up.B. He had become a famous diver.C. His father would dive with him.D. His daughter would dive with him.9. What can be inferred from Paragraph 2?A. Larry had some special right.B. Larry liked the rented diving suits.C. Divers had to buy diving equipment.D. Ten-year-old children were permitted to dive.10. What can be learned from the underlined sentence?A. Larry didn’t wear a watch.B. Larry was not good at math.C. Larry had a poor memory.D. Larry enjoyed the adventure.11. What did Larry expect his daughter to do?A. Become a successful diver.B. Make a good diving guide.C. Take a lot of photo underwater.D. Have longer hours of training.DFor years, Zach Ault, a father of three, enjoyed being physically active. He was even training for a half-marathon. But in 2017, he took time off to recover from an infection. After recovering, he tried to continue his runs but could not complete them. He was not able to spend time with his children. He had to cut back his job. Even sleeping as much as 16 hours a day made no difference in his condition.“His body had literally hijacked him and it wasn't going to allow him to push through, ” said Anne Ault, his wife. After months of testing, doctors announced their result-chronic fatigue syndrome, a disease that makes an individual feel extremely tired.This fatigue lasts more than six months and becomes worse after any kind of physical exertion (费力活动). Patients may have difficulty standing upright. They also may have trouble thinking, often described as a “brain fog”.There are no approvedtreatments, or even tests to help with diagnosis. There is no way to predict who will recover and who will have a severe case that lasts for years.Now the doctors at the National Institutes of Health (NIH) are conducting a unique study to learn more about the condition. Zach Ault is one of the subjects in the study. When Ault rides an exercise bicycle, scientists measure how his leg muscles use oxygen. Afterward, doctors fit a special cap on Ault's head to measure electrical activity in his brain. They then send him to spend the night in an air-tight room where air has been removed with pipe for additional study. Scientists measure oxygen and carbon dioxide levels to tell how much energy Ault is using, minute by minute. “We're figuring out how his body adjusts to an exercise load, or a stress load.”“It's hard not knowing if or when I'm going to recover, ” he said. But Ault says the study did help him learn about the disease. And it gave him ideas about how to save up his energy.12. What was Zach Ault's life like before 2017?A. He was fond of exercising.B. He won several half-marathons.C. He spent much time lying in bed.D. He was busy looking after his children.13. How did the infection affect Zach Ault?A. He lost his job.B. He was unable to sleep.C. He became too weak to do sports.D. He was tired of running a half-marathon.14. What can we learn about chronic fatigue syndrome?A. It usually lasts no more than months.B. It is likely to cause thinking disorders.C. Patients with it need to stay in bed all day long.D. Patients with it should avoid any kind of exercise.15. What does Zach Ault think of the study?A. It helped him cure his illness.B. It helped him recover and stay fit.C. It taught him how to enjoy cycling.D. It brought him new ideas about fighting diseases.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021学年深圳中学初中部高三英语期中考试试题及答案
2020-2021学年深圳中学初中部高三英语期中考试试题及答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AAshish, the 48-year-old surgeon encourages others to do the same through Bloodline, a nonprofit association he founded in 2017. Besides this, he donates blood regularly.According to Ashish, who has been a doctor at a United Family Healthcare hospital in Shanghai since 2007, Bloodline is aimed at creating a blood bank that can help the community as well as individuals with rare blood types who face an urgent need for blood.“My father, a doctor who specialized in treating chest infections, only charged those who could afford the medical treatment. For those who couldn’t pay, he never mentioned money and instead gave them the drugs for free.” he says.During his growing up years, Ashish was also exposed to social services, helping collect food and money for a local children’s hospital.Ashish first donated blood when he was 18. After arriving in China in 2003, Ashish learned mandarin at Fudan University in Shanghai before becoming a graduate student in general surgery at Shanghai Huashan Hospital. Here, he continued participating in blood donation drives as his way of giving back to society. In 2011, he became a volunteer at the Shanghai Blood Center where he helped raise public awareness about blood donations.The idea of setting up an online community for this cause came in 2013 as he believed that there should be a group of expats who get together voluntarily to work with patients and organize regular gatherings to raise public awareness. In 2017, this community was officially registered as Bloodline.“Our organization currently has a presence in 14 cities, including Beijing, Dalian, and Guangzhou. It’s often a small group of people in each city but they can help a great deal.” says Ashish, who holds the roles of ambassador and director of the foreign volunteers group at the Shanghai Blood Center.Ashish has also emphasize the importance of raising awareness of their causes in children, noting that people from the younger generations are more receptive to the idea of donating blood. Bloodline is currently planning to launch a junior club within the organization where youth will get to tour blood donation centers, witness how the blood is dealt, who the end users are, and the difference that they can make to the lives of those in need of blood.“We come from different countries and have different skin color1 s, but the blood streaming through ourbodies is the same. When there is a need to roll up sleeves and save lives, we will step forward bravely.” he says.1. The goal of Bloodline is to ________.A. set up a blood bank that can help the communityB. raise money for the charityC. assist children in local hospitalsD. help poor people reduce their financial burden2. What can we infer about Ashish through the whole passage? He ________.A. benefited from blood donation himselfB. got his medical degree in FuDan UniversityC. got the idea of founding Bloodline from his fatherD. helped collect food and money for a local children’s hospital3. What message does the passage convey to us?A. Giving is receivingB. Hard work leads to success.C. One needs to return the favor.D. Love is without boundaries.BIt’s become an accepted part of keeping up to date with extended family and friends, but if schoolchildren were in their parents’ shoes, the majority wouldn’t share posts of their sons and daughters online. Over 55% said they would not upload news about, or images of, their children to their social media feeds, according to survey of over 16,000 pupils by Votes for Schools.While some were concerned about being embarrassed or the longevity of content which could remain online indefinitely, others expressed concern about their personal data beingcompromised. One of the pupils surveyed said, “Although our parents mean well, sometimes theconsequenceof a post can be disastrous.”In response to thesurvey, children’s mental health charity Place2Be and law firm Mishcon de Reya have produced three films ahead of the Christmas holidays – the best period for parental oversharing.In one video, about safety online, 10-year-old Adavan said, “If you share anything with your family, you know who’s going to see it. But if you share it publicly, there are millions of people who can see your picture.”Joe Hancock, a security lead at Mishcon de Reya, encouraged parents to share wisely. “Simple steps, such as checking your privacy settings and asking others not to share content of your children on their accounts if they have not updated their privacy settings, are a good start. And, as we found out from the children during filming, having their permission is key,” he said.The study marks a shift away from the usual debate about teaching children to use the Internet safely. Sandra Davis, head of the law firm’s family department, said, “Children are the experts on the real and immediate impact of sharenting（晒娃）– the full extent of which we cannot know yet. We must ensure we listen to children and take their views into consideration now in order to avoid any unintendedconsequences further down the line.”4.What’s most pupils’ attitude towards sharing posts about children?A. Skeptical.B. Unconcerned.C. Tolerant.D. Unwilling.5.What does the author intend to do in Paragraph 2?A. Summarize the previous paragraph.B. Provide some advice for parents.C. Predict the consequence of sharing posts.D. Give reasons for the result of the survey.6.What should parents first pay attention to according to Joe Hancock?A. Safety.B. Consequence.C. Wisdom.D. Health.7.What can we learn from the last paragraph?A. Parents should take children’s opinions into account.B. Parents should teach children to use the Internet safely.C. Children must make sure to listen to their parents.D. Children should avoid unintended consequences of sharenting.CA teenager in Georgia will no longer have to walk 7 miles to work after school thanks to one woman’s act of kindness.Jayden Sutton, a high school senior, went on foot each day from school to his job at a restaurant and then back home. Sutton was determined to work and make enough money to eventually buy his own vehicle.Sutton said he’d leave school at 3:30 pm, then walk miles to his job at the restaurant. After his work, which usually lasted six to eight hours, he walked home, sometimes not arriving back until almost midnight.That all changed when Myers saw him walking down the road in the rain in December. “The young man was insistently in a rush walking to work, saying ‘I can’t be late,’” Myers said. “He begged me to give him a ride. I told him I could take him as far as I was going. I began to create small talk along the way. It wasrevealedto me that his name was Jayden, 12th grader, worked 40 hours a week, walked 5 miles to work immediately after school, got off at 10:30 pm at night and walked back home another 5 miles if co-workers didn’t offer a ride.”After dropping Sutton off, Myers said his heart and determination filled her with tears. “He was smiling in good spirits and that’s a child worth blessing,” she told Fox News. So, Myers shared Sutton’s story on the GoFundMe page, which raised more than $ 9, 000 from 186 donors.She surprised Sutton with a new car after she managed to convince the general manager to drop the price of the vehicle to meet the budget.8. Why did Sutton work so hard in his spare time?A. To gain working experience.B. To pay for his education.C. To own a car.D. To support his family.9. What difficulty did Sutton have in his work at the restaurant?A. He worked longer than other workers.B. His work was too tiring.C. His job was much less paid.D. He had to walk to work.10. What does the underlined word “revealed” in paragraph 4 mean?A. Known.B. Attached.C. Believed.D. Limited.11. What do we know about the money donated online?A. It could buy more than a new car.B. It was not enough to buy a new car.C. It was given to Myers to buy herself a new car.D It mainly came from a car sales manager.DAustralia’s Great Barrier Reef has lost 50% of its corals (珊瑚) within 30 years, with climate change a key driver of reef disturbance, a new study has found.Researchers from the ARC Centre of Excellence for Coral Reef Studies, inQueensland, northeasternAustralia, studied coral communities and theirsize along the length of theGreat Barrier Reefbetween 1995 and 2017, finding all coral populations disappear gradually, they said.Reefs are important to the health of ocean ecosystems — without them, ecosystems break down and ocean life dies.Coral population decreases happened in both shallow and deep water coral species, experts found, but branching and table-shaped corals — which provide habitats for fish — were worst affected by mass bleaching (漂白) events in 2016.Warm ocean temperatures are the main reason of coral bleaching. Bleaching doesn’t kill coral immediately,but if temperatures remain high, eventually the coral will die, destroying a natural habitat for many species of ocean life.“We used to think the Great Barrier Reef is protected by its huge size — but in fact our results show that even the world’s largest and ly well-protected reef system is increasingly destroyed and in decline,” Terry Hughes, an outstanding professor at the ARC Centre of Excellence for Coral Reef Studies, said.“There is no time to lose — we must sharply decrease greenhouse gas emissions as soon as possible,” the reporter warned in the paper, published in the Proceedings of the Royal Society journal.12. What has mainly influenced the coral populations of theGreat Barrier Reef?A. Destroyed habitats.B. Climate change.C. Lack of seafood.D. Bleaching events.13. What can we learn from the passage?A. Many species has been dying out slowly.B. The size of reefs contributes to their protection.C. Ocean ecosystems don’t develop without reefs.D. Bleaching continually disturbs table-shaped corals.14. What attitude does the reporter hold to the present situation of theGreat Barrier Reef?A. Worried.B. Angry.C. Hopeful.D. Surprised.15. What is probably the best title for the passage?A. Climate change damages theGreat Barrier ReefB. The Species of ocean Life Are In DangerC. Greenhouse Gas Emissions Get WorseD. Sea Ecosystems Are In Decline第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。
2020-2021深圳实验学校初中部高一数学上期中一模试卷附答案
2020-2021深圳实验学校初中部高一数学上期中一模试卷附答案一、选择题1．已知集合{}220A x x x =-->，则A =R ðA ．{}12x x -<<B ．{}12x x -≤≤ C ．}{}{|12x x x x <-⋃D ．}{}{|1|2x x x x ≤-⋃≥2．在下列区间中，函数()43xf x e x =+-的零点所在的区间为（ ） A ．1,04⎛⎫-⎪⎝⎭B ．10,4⎛⎫ ⎪⎝⎭C ．11,42⎛⎫⎪⎝⎭D ．13,24⎛⎫⎪⎝⎭3．不等式()2log 231a x x -+≤-在x ∈R 上恒成立，则实数a 的取值范围是（ ） A ．[)2,+∞B ．(]1,2C ．1,12⎡⎫⎪⎢⎣⎭D ．10,2⎛⎤ ⎥⎝⎦4．已知函数()1ln 1xf x x -=+，则不等式()()130f x f x +-≥的解集为（ ） A ．1,2⎡⎫+∞⎪⎢⎣⎭B ．11,32⎛⎤ ⎥⎝⎦C ．12,43⎡⎫⎪⎢⎣⎭D ．12,23⎡⎫⎪⎢⎣⎭5．如图，点O 为坐标原点，点(1,1)A ，若函数xy a =及log b y x =的图象与线段OA 分别交于点M ，N ，且M ，N 恰好是线段OA 的两个三等分点，则a ，b 满足．A ．1a b <<B ．1b a <<C ．1b a >>D ．1a b >>6．已知(31)4,1()log ,1a a x a x f x x x -+<⎧=⎨≥⎩是(,)-∞+∞上的减函数，那么a 的取值范围是（ ） A ．(0,1)B ．1(0,)3C ．11[,)73D ．1[,1)77．已知函数2221,2,()2,2,x x x x f x x -⎧-++<=⎨≥⎩且存在三个不同的实数123,,x x x ，使得123()()()f x f x f x ==，则123x x x ++的取值范围为（ ）A ．(4,5)B ．[4,5)C ．(4,5]D ．[4,5]8．函数f(x)=23x x +的零点所在的一个区间是 A ．（-2，-1）B ．（-1,0）C ．（0,1）D ．（1,2）9．已知定义在R 上的函数()21()x m f x m -=-为实数为偶函数,记0.5(log 3),a f =2b (log 5),c (2)f f m ==,则,,a b c ,的大小关系为（ ）A ．a b c <<B ．c a b <<C ．a c b <<D ．c b a <<10．设集合2{|430}A x x x =-+<，{|230}B x x =->，则A B =I （ ） A ．3(3,)2--B ．3(3,)2-C ．3(1,)2D ．3(,3)211．三个数0.377,0.3,ln 0.3a b c ===大小的顺序是（ ） A ．a c b >> B ．a b c >> C ．b a c >>D ．c a b >>12．函数()2log ,0,2,0,xx x f x x ⎧>=⎨≤⎩则函数()()()2384g x fx f x =-+的零点个数是（ ）A ．5B ．4C ．3D ．6二、填空题13．若函数()24,43,x x f x x x x λλ-≥⎧=⎨-+<⎩恰有2个零点，则λ的取值范围是______. 14．函数y=232x x --的定义域是 . 15．下列各式：（1）122[(2)]2---=- ；（2）已知2log 13a〈 ，则23a 〉 . （3）函数2xy =的图象与函数2x y -=-的图象关于原点对称；（4）函数()f x =21mx mx ++的定义域是R ，则m 的取值范围是04m <≤；（5）函数2ln()y x x =-+的递增区间为1,2⎛⎤-∞ ⎥⎝⎦. 正确的．．．有________．（把你认为正确的序号全部写上） 16．已知函数()(),y f x y g x ==分别是定义在[]3,3-上的偶函数和奇函数，且它们在[]0,3上的图象如图所示，则不等式()()0f x g x ≥在[]3,3-上的解集是________.17．已知定义在实数集R 上的偶函数()f x 在区间(],0-∞上是减函数,则不等式()()1ln f f x <的解集是________.18．已知函数1)4f x +=-，则()f x 的解析式为_________.19．某班有36名同学参加数学、物理、化学竞赛小组，每名同学至多参加两个小组，已知参加数学、物理、化学小组的人数分别为26，15，13，同时参加数学和物理小组的有6人，同时参加物理和化学小组的有4人，则同时参加数学和化学小组的有__________人． 20．若关于 x 的方程2420x x a ---= 在区间 (1, 4) 内有解，则实数 a 的取值范围是_____．三、解答题21．已知函数()()221+0g x ax ax b a =-+>在区间[2,3]上有最大值4和最小值1.(1)求a 、b 的值； (2)设()()2g x f x x =-，若不等式()0f x k ->在x ∈(]2,5上恒成立，求实数k 的取值范围．22．已知函数2()(2)3f x x a x =+--．（1）若函数()f x 在[]2,4-上是单调函数，求实数a 的取值范围；（2）当5a =，[1,1]x ∈-时，不等式()24f x m x >+-恒成立，求实数m 的范围． 23．若()f x 是定义在(0,)+∞上的函数，且满足()()()x f f x f y y=-， 当1x >时，()0f x >. （1）判断并证明函数的单调性；（2）若(2)1f =，解不等式1(3)()2f x f x+-<. 24．已知函数()2(0,)af x x x a R x=+≠∈. （1）判断()f x 的奇偶性；（2）若()f x 在[)2,+∞是增函数，求实数a 的范围. 25．设全集U=R ，集合A={x|1≤x ＜4}，B={x|2a≤x ＜3-a}．（1）若a=-2，求B∩A ，B∩(∁U A)；（2）若A∪B=A ，求实数a 的取值范围． 26．设集合2{|40,}A x x x x R =+=∈，22{|2(1)10,}B x x a x a x R =+++-=∈. (1)若A B B ⋃=，求实数a 的值; (2)若A B B =I ，求实数a 的范围.【参考答案】***试卷处理标记，请不要删除一、选择题 1．B 解析：B 【解析】分析：首先利用一元二次不等式的解法，求出220x x -->的解集，从而求得集合A ，之后根据集合补集中元素的特征，求得结果. 详解：解不等式220x x -->得12x x -或， 所以{}|12A x x x =<->或，所以可以求得{}|12R C A x x =-≤≤，故选B.点睛：该题考查的是有关一元二次不等式的解法以及集合的补集的求解问题，在解题的过程中，需要明确一元二次不等式的解集的形式以及补集中元素的特征，从而求得结果.2．C解析：C 【解析】 【分析】先判断函数()f x 在R 上单调递增，由104102f f ⎧⎛⎫< ⎪⎪⎪⎝⎭⎨⎛⎫⎪> ⎪⎪⎝⎭⎩,利用零点存在定理可得结果.【详解】因为函数()43xf x e x =+-在R 上连续单调递增，且114411221143204411431022f e e f e e ⎧⎛⎫=+⨯-=-<⎪ ⎪⎪⎝⎭⎨⎛⎫⎪=+⨯-=-> ⎪⎪⎝⎭⎩, 所以函数的零点在区间11,42⎛⎫⎪⎝⎭内，故选C.【点睛】本题主要考查零点存在定理的应用，属于简单题.应用零点存在定理解题时，要注意两点：（1）函数是否为单调函数；（2）函数是否连续.3．C解析：C 【解析】 【分析】由()2223122-+=-+≥x x x 以及题中的条件，根据对数函数的单调性性，对a 讨论求解即可. 【详解】由()2log 231a x x -+≤-可得()21log 23log -+≤a ax x a， 当1a >时，由()2223122-+=-+≥x x x 可知2123-+≤x x a无实数解，故舍去； 当01a <<时，()2212312-+=-+≥x x x a在x ∈R 上恒成立，所以12a ≤，解得112a ≤<. 故选：C 【点睛】本题主要考查对数函数的单调性，涉及到复合函数问题，属于中档题.4．D解析：D 【解析】 【分析】根据题意可得函数()f x 的奇偶性以及单调性，据此原不等式转化为()()31f x f x ≥-，求解可得x 的取值范围，即可得出结论． 【详解】根据题意，函数()1ln 1xf x x-=+， 则有101xx->+，解可得11x -<<， 即函数的定义域为()1,1-，关于原点对称， 又由()()11lnln 11x xf x f x x x+--==-=--+， 即函数()f x 为奇函数， 设11xt x -=+，则y lnt =， 12111x t x x -==-++，在()1,1-上为减函数， 而y lnt =在()0,∞+上为增函数， 故()1ln1xf x x-=+在区间()1,1-上为减函数， ()()()()13013f x f x f x f x +-≥⇒≥--()()3131111311x x f x f x x x ≤-⎧⎪⇒≥-⇒-<<⎨⎪-<-<⎩，解可得：1223x ≤<，即不等式的解集为12,23⎡⎫⎪⎢⎣⎭； 故选:D ． 【点睛】本题考查函数的奇偶性与单调性的综合应用，解题时不要忽略函数的定义域，属于中档题．5．A解析：A 【解析】 【分析】由,M N 恰好是线段OA 的两个三等分点，求得,M N 的坐标，分别代入指数函数和对数函数的解析式，求得,a b 的值，即可求解. 【详解】由题意知(1,1)A ，且,M N 恰好是线段OA 的两个三等分点，所以11,33M ⎛⎫⎪⎝⎭，22,33N ⎛⎫ ⎪⎝⎭， 把11,33M ⎛⎫ ⎪⎝⎭代入函数xy a =，即1313a =，解得127a =，把22,33N ⎛⎫ ⎪⎝⎭代入函数log b y x =，即22log 33b =，即得32239b ⎛⎫== ⎪⎝⎭，所以1a b <<. 故选A. 【点睛】本题主要考查了指数函数与对数函数的图象与性质的应用，其中解答熟练应用指数函数和对数函数的解析式求得,a b 的值是解答的关键，着重考查了推理与运算能力，属于基础题.6．C解析：C 【解析】 【分析】要使函数()f x 在(,)-∞+∞上为减函数，则要求①当1x <，()(31)4f x a x a =-+在区间(,1)-∞为减函数，②当1x ≥时，()log a f x x =在区间[1,)+∞为减函数，③当1x =时，(31)14log 1a a a -⨯+≥，综上①②③解方程即可.【详解】令()(31)4g x a x =-+，()log a h x x =.要使函数()f x 在(,)-∞+∞上为减函数，则有()(31)4g x a x =-+在区间(,1)-∞上为减函数，()log a h x x =在区间[1,)+∞上为减函数且(1)(1)g h ≥,∴31001(1)(31)14log 1(1)a a a g a a h -<⎧⎪<<⎨⎪=-⨯+≥=⎩,解得1173a ≤<. 故选：C. 【点睛】考查分段函数求参数的问题.其中一次函数y ax b =+，当0a <时，函数y ax b =+在R 上为减函数，对数函数log ,(0)a y x x =>，当01a <<时，对数函数log ay x =在区间(0,)+∞上为减函数.7．A解析：A 【解析】不妨设123x x x <<，当2x <时，()()212f x x =--+，此时二次函数的对称轴为1x =，最大值为2，作出函数()f x 的图象如图，由222x -=得3x =，由()()()123f x f x f x ==，，且1212x x +=，即122x x +=，12332,x x x x ∴++=+ 由图可知3323,425x x <<∴<+<， 即123x x x ++的取值范围是()4,5，故选A.8．B解析：B 【解析】试题分析：因为函数f(x)=2x +3x 在其定义域内是递增的，那么根据f(-1)=153022-=-<,f （0）=1+0=1>0,那么函数的零点存在性定理可知，函数的零点的区间为（-1,0），选B ． 考点：本试题主要考查了函数零点的问题的运用．点评：解决该试题的关键是利用零点存在性定理，根据区间端点值的乘积小于零，得到函数的零点的区间．9．B解析：B 【解析】由()f x 为偶函数得0m =,所以0,52log 3log 32121312,a =-=-=-=2log 521514b =-=-=,0210c =-=,所以c a b <<,故选B.考点：本题主要考查函数奇偶性及对数运算.10．D解析：D 【解析】试题分析：集合()(){}{}|130|13A x x x x x =--<=<<，集合，所以3|32A B x x ⎧⎫⋂=<<⎨⎬⎩⎭,故选D.考点：1、一元二次不等式；2、集合的运算.11．B解析：B 【解析】试题分析：根据指数函数和对数函数的单调性知：0.30771a =>=，即1a >；7000.30.31b <=<=，即01b <<；ln0.3ln10c =<=，即0c <；所以a b c >>，故正确答案为选项B ．考点：指数函数和对数函数的单调性；间接比较法．12．A解析：A 【解析】 【分析】通过对()g x 式子的分析，把求零点个数转化成求方程的根，结合图象，数形结合得到根的个数，即可得到零点个数． 【详解】 函数()()()2384g x f x f x =-+=()()322f x f x --⎡⎤⎡⎤⎣⎦⎣⎦的零点即方程()23f x =和()2f x =的根， 函数()2log ,0,2,0x x x f x x ⎧>=⎨≤⎩的图象如图所示：由图可得方程()23f x =和()2f x =共有5个根， 即函数()()()2384g x f x f x =-+有5个零点,故选：A . 【点睛】本题考查函数的零点与方程的根的个数的关系，注意结合图象，利用数形结合求得结果时作图很关键，要标准．二、填空题13．【解析】【分析】根据题意在同一个坐标系中作出函数和的图象结合图象分析可得答案【详解】根据题意在同一个坐标系中作出函数和的图象如图：若函数恰有2个零点即函数图象与轴有且仅有2个交点则或即的取值范围是：解析：(1，3](4,)+∞U ． 【解析】 【分析】根据题意，在同一个坐标系中作出函数4y x =-和243y x x =-+的图象，结合图象分析可得答案． 【详解】根据题意，在同一个坐标系中作出函数4y x =-和243y x x =-+的图象，如图：若函数()f x 恰有2个零点，即函数()f x 图象与x 轴有且仅有2个交点， 则13λ<…或4λ>，即λ的取值范围是：(1，3](4,)+∞U 故答案为：(1，3](4,)+∞U ．【点睛】本题考查分段函数的图象和函数的零点，考查数形结合思想的运用，考查发现问题解决问题的能力.14．【解析】试题分析：要使函数有意义需满足函数定义域为考点：函数定义域解析：[]3,1-【解析】试题分析：要使函数有意义，需满足2232023031x x x x x --≥∴+-≤∴-≤≤，函数定义域为[]3,1- 考点：函数定义域15．（3）【解析】（1）所以错误；（2）当时恒成立；当时综上或所以错误；（3）函数上任取一点则点落在函数上所以两个函数关于原点对称正确；（4）定义域为当时成立；当时得综上所以错误；（5）定义域为由复合函解析：（3） 【解析】 （1）(112221222---⎛⎫⎡⎤-== ⎪⎢⎥⎣⎦⎝⎭，所以错误；（2）2log 1log 3aa a <=，当1a >时，恒成立；当01a <<时，023a <<，综上，023a <<或1a >，所以错误； （3）函数2xy =上任取一点(),x y ，则点(),x y --落在函数2x y -=-上，所以两个函数关于原点对称，正确；（4）定义域为R ，当0m =时，成立；当0m >时，240m m ∆=-≤，得04m <≤，综上，04m ≤≤，所以错误；（5）定义域为()0,1，由复合函数的单调性性质可知，所求增区间为10,2⎛⎫ ⎪⎝⎭，所以错误；所以正确的有（3）。