贵州省贵阳市贵阳一中新世界国际学校2020-2021学年度九年级上学期第一次月考化学试题

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贵州省贵阳市一中新世界国际学校初三第一学期9月摸底考试数学试卷

贵阳一中新世界一中国际学校第一学期摸底考试九年级数学试卷一、选择题（本大题共10小题，每小题3分，共30分）1. 下列等式哪一个是关于x 的一元二次方程（）A. 0212=-+x xB.02=++c bx axC.x x x 21322=+-D.2212x x x +=+ 2. 实数c b a ,,在数轴上的对应点的位置如图所示，则正确的结论是（）A. 4 aB.0 b c -C.0 acD.0 c a +3. 如图，将图（1）中的正方形图案绕中心旋转180°，得到的图案是（）4. 有一支球队参加篮球比赛，共比赛了45场，每两队之间都要比赛一场，则下列方程中符合题意的是（）A. ()45121=-x xB. ()45121=+x x C.()451=-x x D.()451=+x x 5. 不等式组{5121≤+->x x 的解集在数轴上表示正确的是（）A. B. C. D.6.如图5所示，是一块电脑主板的示意图，每一转角处都是直角，数据如图所示（单位：mm)，则该主板的周长是（）A.88mmB.96mmC.80mmD.84mm7.顺次连接一个四边形的各边中点，得到一个矩形，则下列四边形满足条件的是（）①平行四边形 ②菱形 ③矩形 ④对角线互相垂直的四边形A. ①③B.②③C.③④D.②④8.如图，边长为1的正方形ABCD 绕点A 逆时针旋转45°后得到正方形A ’B ’C ’D ’,边B ’C ’与DC 交于点O ，则四边形AB ’OD 的周长是（）A.22B.3C.2D.21+9.如图，在矩形ABCD 中，AB=4，BC=5，对角线AC 的垂直平分线分别交AD 、AC 于点E 、O ，连接CE ，则CE 的长为（）A.6B.7C.4.1D.5.610.如图，直线432+=x y 与x 轴、y 轴分别交于点A 和点B ，点C 、D 分别为线段AB 、OB 的中点，点P 为OA 上一动点，PC+PD 值最小时点P 的坐标为（） A. ()0,3- B. ()0,6- C. ⎪⎭⎫ ⎝⎛-0,23 D. ⎪⎭⎫ ⎝⎛-0,25 二、填空题（本大题共5小题，每小题4分，共20分）11.要使代数式11-+x x 有意义，则x 的取值范围是_______________； 12.如图，在长为30cm 、宽为20cm 的矩形画面四周镶上宽度相等的彩纸，并使彩纸的面积恰好与原画面面积相等(如图所示)，若设彩纸的宽度为xcm ，则满足的方程是___________；13.已知关于x 的不等式组⎩⎨⎧<--≥-0135x a x 无解，则a 的取值范围是_________________; 14.矩形一个内角平分线分矩形一边长为1cm 和3cm 两部分，则这个矩形的面积___________；15.如图，在菱形ABCD 中，∠ABC=120°，将菱形折叠，使点A 恰好落在对角线BD 上的点G 处（不与B,D 重合），折痕为EF ，若DG=2，BG=6,则BE 的长为__________________；三、解答题（共100分）16. （本题满分8分）先化简，再求值：311684194222-÷⎪⎪⎭⎫ ⎝⎛+---⋅--m m m m m m m .其中m=5.17. （本题满分8分，每小题4分）解下列方程：（1）()()x x x -=-22 （2）11412=--+x x x18. （本题满分10分）已知：直线l 及直线l 外一点P ，求作：直线PQ ，使得PQ ∥l.作法如下图：①在直线l 上取一点A ，作射线PA ，以点A 为圆心，AP 长为半径画弧，交PA 的延长线于点B ；②在直线l 上取一点C （不与点A 重合），作射线BC ，以点C 为圆心，CB 长为半径画弧，交BC 的延长线于点Q; ③作直线PQ ；所以直线PQ 就是所求作的直线。

2020-2021贵阳清华中学九年级数学上期中第一次模拟试卷附答案

2020-2021贵阳清华中学九年级数学上期中第一次模拟试卷附答案一、选择题1．如图，在△ABC 中，AB=10，AC=8，BC=6，经过点C 且与边AB 相切的动圆与CA 、CB 分别相交于点P 、Q ，则线段PQ 长度的最小值是（）A ．4.75B ．4.8C ．5D ．42．如图，AB 为⊙O 的直径，点C 为⊙O 上的一点，过点C 作⊙O 的切线，交直径AB 的延长线于点D ，若∠A =25°，则∠D 的度数是（）A ．25°B ．40°C ．50°D ．65°3．下列图形中，既是轴对称图形又是中心对称图形的是（）A ．B ．C ．D ．4．若关于x 的一元二次方程（m ﹣1）x 2+5x+m 2﹣5m+4=0有一个根为0，则m 的值等于（）A ．1B ．1或4C ．4D ．05．在Rt ABC ∆中，90ABC ∠=︒，:BC 2:3=AB ， 5AC =，则AB =（）． A ．52 B ．10 C ．5D ．15 6．将函数y=kx 2与y=kx+k 的图象画在同一个直角坐标系中，可能的是（） A ． B ． C ． D ．7．解一元二次方程 x 2﹣8x ﹣5＝0，用配方法可变形为（）A ．（x +4）2＝11B ．（x ﹣4）2＝11C ．（x +4）2＝21D ．（x ﹣4）2＝218．如图，将⊙O沿弦AB折叠，圆弧恰好经过圆心O，点P是优弧¼AMB上一点，则∠APB 的度数为（）A．45°B．30°C．75°D．60°9．山西剪纸是最古老的汉族民间艺术之一．剪纸作为一种镂空艺术，在视觉上给人以透空的感觉和艺术享受．下列四幅剪纸图案中，是中心对称图形的是（）A．B．C．D．10．函数y=x2+bx+c与y=x的图象如图所示，有以下结论：①b2﹣4c＞0；②b+c+1=0；③3b+c+6=0；④当1＜x＜3时，x2+（b﹣1）x+c＜0．其中正确的个数为A．1 B．2 C．3 D．411．公园有一块正方形的空地，后来从这块空地上划出部分区域栽种鲜花（如图），原空地一边减少了1m，另一边减少了2m，剩余空地的面积为18m2，求原正方形空地的边长．设原正方形的空地的边长为xm，则可列方程为（）A．（x+1）（x+2）=18B．x2﹣3x+16=0C．（x﹣1）（x﹣2）=18D．x2+3x+16=012．如图，圆锥的底面半径r为6cm，高h为8cm，则圆锥的侧面积为（）A．30πcm2B．48πcm2C．60πcm2D．80πcm2二、填空题13．二次函数y＝ax2＋bx＋c的图象如图11所示，且P＝|2a＋b|＋|3b－2c|，Q＝|2a－b|－|3b＋2c|，则P，Q的大小关系是______．14．我国南宋数学家杨辉曾提出这样一个问题：“直田积（矩形面积），八百六十四（平方步），只云阔（宽）不及长一十二步（宽比长少12步），问阔及长各几步．”如果设矩形田地的长为x步，那么根据题意列出的方程为_____．15．若圆锥的底面周长为4π，母线长为6，则圆锥的侧面积等于________．（结果保留π）16．如图,将边长为12的正方形ABCD沿其对角线AC剪开,再把△ABC沿着AD方向平移,得到△A′B′C′,当两个三角形重叠部分的面积为32时,它移动的距离AA′等于________.17．如图，四边形ABCD是⊙O的内接四边形，∠B＝135°，则∠AOC的度数为_____．18．女生小琳所在班级共有40名学生，其中女生占60%.现学校组织部分女生去市三女中参观，需要从小琳所在班级的女生当中随机抽取一名女生参加，那么小琳被抽到的概率是．19．小蕾有某文学名著上、中、下各1册，她随机将它们叠放在一起，从上到下的顺序恰好为“上册、中册、下册”的概率是____________．20．如图，在△ABC中，∠ACB=90°，AC=BC=2，将△ABC绕AC的中点D逆时针旋转90°得到△A'B′C'，其中点B的运动路径为¼BB'，则图中阴影部分的面积为_____．三、解答题21．因魔幻等与众不同的城市特质，以及抖音等新媒体的传播，重庆已成为国内外游客最喜欢的旅游目的地城市之一．著名“网红打卡地”磁器口在2018年五一长假期间，接待游客达20万人次，预计在2020年五一长假期间，接待游客将达28.8万人次．在磁器口老街，美食无数，一家特色小面店希望在五一长假期间获得好的收益，经测算知，该小面成本价为每碗6元，借鉴以往经验：若每碗卖25元，平均每天将销售300碗，若价格每降低1元，则平均每天多销售30碗．(1)求出2018至2020年五一长假期间游客人次的年平均增长率；(2)为了更好地维护重庆城市形象，店家规定每碗售价不得超过20元，则当每碗售价定为多少元时，店家才能实现每天利润6300元？22．某商场销售一批名牌衬衫,平均每天可销售20件,每件盈利40元.为了扩大销售,增加盈利,尽量减少库存,商场决定采取适当的降价措施.经调查发现,如果每件衬衫每降价5元,商场平均每天可多售出10件.求:(1)若商场每件衬衫降价4元,则商场每天可盈利多少元?(2)若商场平均每天要盈利1200元,每件衬衫应降价多少元?(3)要使商场平均每天盈利1600元,可能吗?请说明理由.23．如图，已知△ABC中，AB＝AC，把△ABC绕A点沿顺时针方向旋转得到△ADE，连接BD，CE交于点F．（1）求证：△AEC≌△ADB；（2）若AB＝2，∠BAC＝45°，当四边形ADFC是菱形时，求BF的长．24．如图，已知抛物线y=﹣x2+bx+c与x轴交于点A（﹣1，0）和点B（3，0），与y轴交于点C，连接BC交抛物线的对称轴于点E，D是抛物线的顶点．（1）求此抛物线的解析式；（2）求点C和点D的坐标；（3）若点P在第一象限内的抛物线上，且S△ABP=4S△COE，求P点坐标．25．如图，已知AB是⊙O的直径，点C、D在⊙O上，点E在⊙O外，∠EAC＝∠D＝60°．（1）求∠ABC的度数；（2）求证：AE是⊙O的切线；（3）当BC＝4时，求阴影部分的面积．【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】设QP的中点为F，圆F与AB的切点为D，连接FD，连接CF，CD，则有FD⊥AB；由勾股定理的逆定理知，△ABC是直角三角形，FC+FD=PQ，由三角形的三边关系知，FC+FD＞CD；只有当点F在CD上时，FC+FD=PQ有最小值，最小值为CD的长，即当点F在直角三角形ABC的斜边AB的高CD上时，PQ=CD有最小值，由直角三角形的面积公式知，此时CD=BC•AC÷AB=4.8．【详解】如图，设QP的中点为F，圆F与AB的切点为D，连接FD、CF、CD，则FD⊥AB．∵AB=10，AC=8，BC=6，∴∠ACB=90°，FC+FD=PQ，∴FC+FD＞CD，∵当点F在直角三角形ABC的斜边AB的高CD上时，PQ=CD有最小值，∴CD=BC•AC÷AB=4.8．故选B．【点睛】本题利用了切线的性质，勾股定理的逆定理，三角形的三边关系，直角三角形的面积公式求解．2．B解析：B【解析】连接OC，∵CD是切线，∴∠OCD=90°，∵OA=OC，∴∠ACO=∠BAC=25°，∴∠COD=∠ACO+∠BAC=50°，∴∠D=90°-∠COD=40°，故选B.3．B解析：B【解析】【分析】根据轴对称图形与中心对称图形的概念求解．【详解】A、不是轴对称图形，是中心对称图形，故此选项错误；B、是轴对称图形，也是中心对称图形，故此选项正确；C、是轴对称图形，不是中心对称图形，故此选项错误；D、是轴对称图形，不是中心对称图形，故此选项错误；故选B．【点睛】此题主要考查了中心对称图形与轴对称图形的概念．轴对称图形的关键是寻找对称轴，图形两部分折叠后可重合，中心对称图形是要寻找对称中心，旋转180度后两部分重合．4．C解析：C【解析】【分析】先把x ＝0代入方程求出m 的值，然后根据一元二次方程的定义确定满足条件的m 的值．【详解】解：把x ＝0代入方程得m²−5m ＋4＝0，解得m ₁＝4，m ₂＝1，而a−1≠0，所以m ＝4．故选C ．【点睛】本题考查了一元二次方程的解：能使一元二次方程左右两边相等的未知数的值是一元二次方程的解．注意一元二次方程的定义．5．B解析：B【解析】【分析】依题意可设2=AB x ，3BC x =，根据勾股定理列出关于x 的方程，解方程求出x 的值，进而可得答案.【详解】解：如图，设2=AB x ，3BC x =，根据勾股定理，得：222325+=x x ，解得5x =，∴10AB =.故选B.【点睛】本题考查了勾股定理和简单的一元二次方程的解法，属于基础题型，熟练掌握勾股定理是解题的关键.6．C解析：C【解析】【分析】根据题意，利用分类讨论的方法，讨论k ＞0和k ＜0，函数y=kx 2与y=kx+k 的图象，从而可以解答本题．【详解】当k ＞0时，函数y=kx 2的图象是开口向上，顶点在原点的抛物线，y=kx+k 的图象经过第一、二、三象限，是一条直线，故选项A 、B 均错误，当k ＜0时，函数y=kx2的图象是开口向下，顶点在原点的抛物线，y=kx+k的图象经过第二、三、四象限，是一条直线，故选项C正确，选项D错误，故选C．【点睛】本题考查二次函数的图象、一次函数的图象，解答本题的关键是明确题意，利用数形结合的思想解答．7．D解析：D【解析】【分析】移项后两边配上一次项系数一半的平方即可得．【详解】解：∵x2-8x=5，∴x2-8x+16=5+16，即（x-4）2=21，故选D．【点睛】本题考查的知识点是解一元二次方程的能力，解题关键是熟练掌握解一元二次方程的几种常用方法：直接开平方法、因式分解法、公式法、配方法，结合方程的特点选择合适、简便的方法．8．D解析：D【解析】【分析】【详解】作半径OC⊥AB于点D，连结OA，OB，∵将O沿弦AB折叠，圆弧较好经过圆心O，∴OD=CD，OD=12OC=12OA，∴∠OAD=30°（30°所对的直角边等于斜边的一半），同理∠OBD=30°，∴∠AOB=120°，∴∠APB=12∠AOB=60°.（圆周角等于圆心角的一半）故选D.9．B解析：B【解析】【分析】根据中心对称图形的概念对各选项分析判断即可得解．【详解】解：A 、不是中心对称图形，故本选项不符合题意；B 、是中心对称图形，故本选项符合题意；C 、不是中心对称图形，故本选项不符合题意；D 、不是中心对称图形，故本选项不符合题意．故选B ．【点睛】本题考查了中心对称图形的概念，中心对称图形是要寻找对称中心，旋转180度后两部分重合．10．B解析：B【解析】分析：∵函数y=x 2+bx+c 与x 轴无交点，∴b 2﹣4c ＜0；故①错误。

贵州省贵阳一中集团内联考2020-2021学年度第一学期九年级上英语期中考试

贵阳一中集团校 2020-2021 学年度第一学期联合监测（一）第一卷（选择题，共50分）第一部分完形填空。

（共两节，16小题；每小题1分，共16分）We know that tea is the most popular drink in the world. However, do you believe that it was an accidental 1._________? It’s believed by many people that tea was first drunk about 5,000 years ago and the first person to discover tea as a drink was a Chinese ruler called Shen Nong. He found that the boiling drinking water 2._______leaves from a tea plant produced a nice smell and it tasted delicious. Then, tea was invented as one of the most popular drinks in the world. Shen Nong was 3._________ in Lu Yu’s book called Cha Jing several thousand years la ter. A lot of information about tea can be found in his book. For example, you may know about 4._________ tea plants were grown and used to make tea, together with where the finest tea leaves were produced and what kinds of water were used. Tea was brought from China to other countries very 5._________and widely. During the 6th and 7th centuries, tea was brought to Korea and Japan. In around 1660, tea appeared in England and soon it became the national drink. The tea trade which took place in the 19th century helped to spread the 6._______of tea and the tea plant to more places around the world. There’s no doubt that we Chinese best understand the nature of tea besides tea culture.第二节阅读下面一篇短文，从每题所给的A.B.C三个选项中，选出可以填入空白处的最佳选项。

2020-2021学年贵阳一中新世界国际学校高三语文第一次联考试题及答案解析

2020-2021学年贵阳一中新世界国际学校高三语文第一次联考试题及答案解析一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字，完成下列各小题。

《红楼梦》中的服饰有一些是汉族历代传承的服饰，但也有很多是清代人的穿着。

黛玉初至荣国府时，见到王熙凤穿着“缕金百蝶穿花大红洋缎窄裉袄，外罩五彩刻丝石青银鼠褂”。

袭人要回家探亲时也是在“桃红百子刻丝银鼠袄子”外，再套上“青缎灰鼠褂”。

徐珂《清稗类钞•服饰》中说：“褂，外衣也，礼服之加于袍外者。

”赵振民《中国衣冠中之满服成分》索性认定：“中国古无‘褂’字盖满制也。

”应该说褂子是清代人对肥大上衣的习惯称谓。

贾宝玉是作者着墨最多、寄托最深的人物之一。

他的服饰特色主要体现在红色上。

初见黛玉时，服饰以红为主色；群芳夜宴时，枕着红香花枕；祭晴雯时，穿着血点般大红裤子：看破红尘出家时，身披“大红猩猩毡的斗篷”。

这是因为红色是最能体现宝玉个性特征和心理状态的颜色。

红色有强烈的视觉效果，具有令人产生激动、热烈的本性和感情的力量，与他热情奔放的性格暗合。

红色也体现了他尊重女性的心理特征。

中国传统文化中，红色常是女性的代名词，古代男子常称其女性好友为“红颜知己”。

宝玉非常推崇、爱慕和关心女性，红色岂不正是他怡悦红颜的绝妙注解？红色还是他反抗封建礼教、追求个性解放的象征。

他虽被视为掌上明珠，却处处受羁绊，恨不能挣脱封建礼教的束缚。

而红色常使人联想到火焰和鲜血的颜色，是充满刺激性和令人振奋的色彩。

它能使人产生积极进取的态度，这正是宝玉性格的写照。

服饰不但能突现人的外貌和性格，在阶级社会里，更能显示人的地位。

贾雨村还是寄住在葫芦庙内的一个穷儒时，曹雪芹只用“敝巾旧服”四个字就画出了这个落魄文人的潦倒。

邢岫烟虽为小姐，无奈家道艰难，只能着“家常旧衣”，连冬天也穿得“很单薄”。

对那些美貌而富贵的人曹雪芹则不惜浓墨重彩。

只看看宝玉的佩戴物就知道了。

他的帽子是嵌玉紫金冠；颈上挂着饰有“金螭缨络”的项圈；那通灵宝玉，先是用“五彩金丝”系着，后又由莺儿织了一个“梅花络”套上；又有“寄名锁”——在神僧面前“寄名”为“弟子”，再铸一把锁，以示神命锁住；还有道士所画能祛邪的“护身符”。

2020-2021学年九年级上学期第一次半月考试数学试题(A卷 )

2020-2021(上)九年级第一次半月考数学试卷 (A卷)（2020.8.31）总分：150分时间：120分钟命题人：一、选择题（每小题4分，共40分）1．下列二次根式中，最简二次根式的个数是（），，，，，，，． A．1个B．2个C．3个D．4个2．下面关于x的方程：①ax2+bx+c＝0；②x+3＝；③ 3（x﹣9）2﹣（x+1）2＝1；④（a2+2a+2）x2﹣a＝0；⑸＝x﹣1．一元二次方程的个数是（）A．1 B．2 C．3 D．43．使分式有意义的x的取值范围是（）A．x＞﹣1或x≠3 B．x≥﹣1或x≠3 C．x＞﹣1且x≠3 D．x≥﹣1且x≠3 4．某超市一月份的营业额为200万元，第一季度的营业额1000万元，如果平均每月增长率为x元，则由题意列方程应为（）A．200（1+x）2＝1000 B．200+200•2•x＝1000C．200+200•3•x＝1000 D．200[1+（1+x）+（1+x）2]＝1000 5．设关于x的方程ax2+（a+2）x+9a＝0有两个不相等的实数根x1、x2，且x1＜2＜x2，那么实数a的取值范围是（）．A ．；B ．﹣＜a ＜；C ．；D．﹣＜a＜0．6. 若实数a，b 满足+＝3，﹣＝3k，则k的取值范围是（）A．﹣3≤k≤2 B．﹣3≤k≤3 C．﹣1≤k≤1 D．k≥﹣17．设x1，x2是方程x2+x﹣3＝0的两个实数根，则x23﹣4x12+6＝（）A．﹣23 B．﹣19 C．﹣13 D．﹣98．若关于x 的不等式组的整数解共有4个，则关于x的一元二次方程8x2﹣8x+m＝0的根的情况是（）A．有两个不相等的实数根B．有两个相等的实数根C．没有实数根D．有一个实数根9．方程|x2﹣6x|＝a有不同的四个解，则a的取值范围是（）A．a≤9 B．0≤a≤9 C．0＜a＜9 D．0＜a≤910．若实数a 满足方程，则[a]＝（），其中[a]表示不超过a的最大整数．A．0 B．1 C．2 D．3二、填空题（每小题4分，共24分）11．若（a﹣b）x2+（b﹣c）x+（c﹣a）＝0是关于x的一元二次方程，则必有一根为x＝．12. 等腰三角形的三边长分别为a，b，2，且a，b是关于x的一元二次方程x2﹣8x+n﹣2＝0的两根，则n的值为．13．已知m是方程x2﹣2017x+1＝0的一个根，则代数式m2﹣2018m++3的值是．14．已知a•b ≠1，且有5a2+2009a+8＝0及8b2+2009b+5＝0，则＝．15．若x2﹣x﹣2＝0，则的值为．16．代数式的最小值为。

2019——2020年贵阳一中新世界国际学校初三年级第一次月考化学试卷(无答案)

2019——2020年度贵阳一中新世界国际学校初三年级第一次月考化学试卷一、选择题（共14小题）1．新世界人爱新世界，下列说法正确的是（）A．边走边吃，随意乱丢包装袋B．未及时冲厕C．志愿爱护环境D．随意践踏草坪、破坏公物2．中华民族有着光辉灿烂的发明史，下列发明创造不涉及化学反应的是（）A．火药的使用B．用铁矿石冶铁C．烧结黏土制陶瓷D．打磨磁石制指南针3．规范的操作是实验成功的保证。

下列实验操作正确的是（）A．O2的验满B．收集O2C．滴加液体D．检查气密性4．关于催化剂的说法正确的是（）A．化学反应后催化剂本身的质量减少B．反应前后催化剂的化学性质通常会发生改变C．催化剂可加快或减慢化学反应速率D．用氯酸钾制取氧气时，加入催化剂可使生成氧气的质量增加5．元素铅的质子数为82，相对原子质量为207，求该元素原子核内中子数与核外电子数之差（）A．42 B．43 C．82 D．836．下列对分子、原子、离子的认识，不正确的是（）A．分子、原子、离子都能直接构成物质B．气体压缩为液体，分子体积和质量变小C．温度越高，分子运动速率越快D．钠原子和钠离子的化学性质不同7．下列关于四种粒子的结构示意图的说法中正确的是（）A．共有四种元素B．①属于阳离子④属于阴离子C．①③的化学性质相似D．①④已达到相对稳定结构8．我国已启动“嫦娥工程”探月计划发射绕月飞行的探测卫星“嫦娥一号”。

人类探月的重要目的之一是勘察、获取地球上蕴藏量很小而月球上却极为丰富的核聚变燃料“C- 13”是指原子核内含有6个质子、7个中子的碳原子，则“He - 3”所指的氦原子核内（）A．含有3个质子，没有中子B．含有2个质子，1个中子C．含有1个质子，2个中子D．含有3个中子，没有质子9．某公司发生火灾引发液氨泄露并发生化学爆炸，造成重大伤亡。

液氨是液态的氨气，常温下，氨气（NH3）是一种无色、有刺激性气味的气体，密度比空气小。

实验室常用氯化铵固体与碱石灰固体共热制取氨气。

2021届贵阳一中新世界国际学校高三英语第一次联考试卷及参考答案

2021届贵阳一中新世界国际学校高三英语第一次联考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ALook at Some Greatest BookstoresAnother CountryKreuzberg, Berlin, Germany. Another Country is an English Language second hand bookshop which is mostly used as a library. They have about 20, 000 books that you can buy or borrow. Some regular events are held at the shop, such as readings, cultural events, social evenings and film nights.Atlantis BooksOia, Santorini, Greece. Atlantis Books is an independent bookshop on the island of Santorini, Greece. It was founded in 2004 by a group of friends from Cyprus, England, and the United States. Throughout the year it has hosted literary festivals, film screenings, book readings, and good old fashioned dance parties.Bart’s BooksOjai, California. U. S. A. “The World’s Greatest Outdoor Bookstore”, a bookstore founded by Richard Bartinsdale in 1964. Shelves of books face the street, and regular customers are asked to drop coins into the door’s coin box to pay for any books they take whenever the store is closed.Adrian Harringtonsince 1971. Rare books: rare first editions; leather bound sets and general antiquarian(古玩).Address: 64a Kensington Church Street, Kensington, London, England, UK.Corso Como BookshopMilan, Italy. Extensive selection of publication on art architecture, design graphics and fashion, along with a strong emphasis on photography. It was founded in 1990 in Milan, Italy, by Carla Sozzamil.The BookwormChina. A bookshop, library, bar, restaurant and event space, now with four divisions in three cities — Beijing, Suzhou and Chengdu. The interconnecting rooms with floor-to-ceiling books on every wall are light and airy in summer, yet warm and comfortable in winter.1.What can you do in Atlantis Books?A.Enjoy rare books.B.Attend a festival.C.Learn photography.D.Buy books anytime.2.Which bookstore has the longest history?A.Adrian Harrington.B.Atlantis Books.C.Bart’s Books.D.Corso Como Bookshop.3.How is The Bookworm different from the others?A.It is used as a library.B.It focuses on photography.C.It hosts all sorts of activities.D.It has branches in different cities.BSimply being quiet is a growing appeal. Lots of business have appeared to meet a rising demand for quiet time, from silent weekend getaways to silent dining, silent reading parties and even silent dating. Silence can mean different things to different people. We are usually silent only with those closest to us. So there is something almost radical(不同凡响的)about the recent trend towards enjoying silence with strangers.Mariel started a regular silent reading party inDundeejust under a year ago. Readers bring their books and meet in a bar, where they read together in silence for an hour or sometimes two and then put their books away to chat and have a drink. “When the reading party starts, everything goes quiet,” says Mariel, “ It’s a little bit surreal (超现实的), especially in what is usually a noisy bar. However, there is something special about sharing the silence with others. It offers a chance to escape from reality; everyone is so busy with work and with technology being ever present. An event like thisgives people the opportunity to escape these things for a while.”Honi Ryan is an artist based inBerlinwho began hosting silent dinner back in 2006. The rules of the dinner are: no talking, no using your voice, no reading or writing, trying to make as little noise as possible, not connecting with technology, and staying for at least two hours. So far she has taken her silent dinner project toMexico, theUS,AustraliaandChina. “It’s evident that the age-old connections we make over food do not depend on the words around it. Silence creates the space for the people and places involved to fill with whatever is needed;itis quite different from our usual social behaviors.”4. Why have lots of silent businesses appeared?A. To satisfy people’s demand for silence.B. To make people get close to each other.C. To appeal to young people.D. To change people’s old way of life.5. What can we learn about Mariel’s silent reading parties?A. Readers can use their voice while reading.B. Readers can be busy with their work.C. Readers can connect with technology.D. Readers can chat and drink after reading.6. The underlined word “it” in the last paragraph refers to .A. noiseB. spaceC. silenceD. food7. What can be a suitable title for the text?A. Escape from Reality.B. Enjoying Being Quiet.C. Silent Reading Parties.D. Silent Dining Projects.CChina's Mars probe Tianwen-1 successfully landed on the surface of the red planet on May 15, 2021, leaving a Chinese footprint on Mars for the first time and in its first attempt, becoming the only other nation besides theUSto get such an achievement. The Tianwen-1 probe touched down at its pre-selected landing area in the southern part of Utopia Planitia, a wide plain on Mars, at 7:18 a.m.(Beijing Time), after three months scanning the whole planet on Mars docking orbit, the China National Space Administration(CNSA) announced.Tianwen-1, including an orbiter, a lander and a rover, was launched from the 'Wenchang Spacecraft Launch Site on the coast of southernChinas islandprovinceofHainanon July 23, 2020. It was the first step inChina's planetary exploration of the solar system, with the aim of completing orbiting, landing and roving on the red planet in one mission. According to the administration, the country's first Martian probe will conduct scientific investigations about the Martian soil, environment, atmosphere as well as water.China's planetary exploration program has been named “Tianwen”, which was named after a long poem by the famous ancient poet Qu Yuan. The name represents the Chinese nation's willpower in pursuing truth, the country's cultural inheritance of its understanding of nature and universe, as well as the unending exploration in science and technology.China's first Mars rover has been named “Zhurong”, which means the god of fire in an ancient Chinese story. The name indicates Chinese people's blessing for the rover to light the flame ofChina's planetary exploration. The rover has six wheels and four solar panels, and carries 13 scientific instruments. According to the CNSA, Zhurong has started its scientific exploration after moving from the landing platform onto the Red Planet's surface on May 22.More than 40 Mars missions have been launched since the 1960s, but only about half have succeeded. It isthe first time in the world that orbiting, landing and roving on Mars has been completed in one launch mission, andChinahas come to the forefront of Mars exploration in the world.8. What can we learn from the first two paragraphs?A. China is the only nation to launch a probe to Mars.B. Tianwen-1 landed in the northern part of the planet.C. Tianwen-1 scanned the southern part of the planet.D. The Mars probe will carry out scientific investigations.9. How did the planetary exploration program get its name?A. From a long poem by Qu Yuan.B. From an ancient Chinese story.C. From Chinese nation's willpower.D. From theChinaNational Space Administration.10. Why does the author sayChinahas come to the leading position of Mars exploration?A. The rover carried many scientific instruments.B. China completed three tasks in one attempt.C. The rover successfully moved from the landing platform onto Mars.D. The CNSA is continuously exploring science and technology.11. What is the text mainly about?A. Tianwen-1 completed its mission.B. Tianwen-1 represented the god of fire.C. Tianwen-1 successfully landed on Mars.D. Tianwen-1 was launched from Wenchang.DIf you've ever had a dog, you know just howdeep a connection you can develop with “man's best friend”. But a dog's life is much shorter than humans, about 12 to 15 years long, which means every dog owner has to go through the heartbreaking moment when their loving pet passes away.Why not make a clone of that dog then? This is the solution offered by a South Korean company, Sooam Biotech Research Foundation. The company has already successfully cloned at least 400 dogs, mostly for US customers, ever since it pioneered the technique in 2005. Now, Sooam Biotech has introduced its business toUKdog owners as well, offering them dogs that look just like their lost ones.To clone a dog, researchers first need to take a skin cell from a living dog or one that has just died. Meanwhile,another dog is selected to supply an egg. Researchers then replace the DNA in the egg with that fromthe skin cell and implant the egg into the womb (子宫) of a female dog. The egg grows into a puppy over the following two months. The whole process takes less than a day, but it comes at a shockingly high price — around ￡63,000.But if you can't afford it now, you can also save the cell in a laboratory andaccess it at a later date.However, magical as cloning might sound, there is no guarantee that the cloned dog will be a perfect copy of the original one. Just like identical twins of humans, they share the exactly same DNA but there will still be small differences between them. “The spots on a Dalmatian (斑点狗) clone will be different, for example” Insung Hwang, head of Sooam Biotech, told The Guardian.Dog owners will also have to accept the fact that personality is not “cloneable”. Apart from genes, personality is also determined by upbringing and environment, which are both random elements that cloning technologies simply cannot overcome, Professor Tom Kirkwood atNewcastle University,UK, told The Telegraph.Perhaps bringing our dogs back by cloning is not the best way to remember them after all.Kirkwood, a dog owner himself, pointed out, “An important aspect of our relationship with them is coming to terms with the pain of letting go.”12. What service does Sooam Biotech Research Foundation offer?A. Making copies of pet dogs.B. Giving pet dogs identical twinsC. Helping dogs give birth to more puppies.D.Helping dog owners love their dogs more.13. Which order is correct in the dog cloning process?a. An egg is taken from another dog.b. A skin cell is taken from the pet dog.c. The egg grows into a puppy in two months.d. The egg is placed in the womb of a female dog.e. The DNA in the egg is replaced by the DNA from the skin cell.A.a→d→b→e→c.B. a→e→b→d→cC. b→a→d→e→c.D. b→a→e→d→c.14. What can we learn about dog cloning from the passage?A. It has not been put into practice until recently.B. It is very popular among US andUKpet owners.C. It might not give the owners an exactlysame dog.D. It is very expensive and usually takes half a year to complete.15. What doesKirkwoodthink of dog cloning?A. He disagrees with it.B. He supports it.C. He is curious about it.D. He thinks it unbelievable.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学年贵阳一中新世界国际学校高三英语期中考试试卷及答案解析

2020-2021学年贵阳一中新世界国际学校高三英语期中考试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AOn a rainy afternoon, maybe one of the following books will keep you company leisurely, allowing you to spend your time alone as well as stepping into a different world.Don’t Shed Your Tears for Anyone Who Lives on These Streets,by Patricio PronIn April 1945,Italy, a writer disappeared at a conference and was found dead at another place. Thirty years later, a young man interviewed survivors from the conference, trying to uncover the truth about what happened and its consequences. This novel, by a well-known Argentine writer, explores art, crime and politics.When Breath Becomes Air, by Paul KalanithiAt thirty-six, Paul Kalanithi was diagnosed (诊断) with stage IV lung cancer. One day he was a doctor treating the dying, and the next he was a patient. This autobiography finds hope and beauty in the face of death as Kalanithi attempts to answer the question “What makes a life worth living?”.To Killa Mockingbird, by Harper LeeSet in a smallAlabamatown in the 1930s, the story focuses on honest, highly respected lawyer Atticus Finch who puts his career on the line when he agrees to represent Tom Robinson, a black man accused of committing a crime.Nobody Will Tell You This But Me: A true (as told to me) storyby Bess KalbBess Kalb saved every voicemail from her grandmother Bobby Bell who died at ninety. In this book, Bobby is speaking to Bess once more, in a voice as loving as it ever was in life and brings us several generations of brave women. They include Bobby’s mother, who traveled alone fromBelarustoAmericato survive, and Bess’s mother, who always fought against convention.1.What type of book is the first novel?A.Sci-fi.B.Biography.C.Detective books.D.History books.2.Which book explores life and death?A.To Kill a MockingbirdB.When Breath Becomes AirC.Don’t Shed Your Tears for Anyone Who Lives on These StreetsD.Nobody Will Tell You This But Me: A true (as told to me) story3.Who is the main character in the last novel?A.Bobby Bell.B.Bess Kalb.C.Bess’s mother.D.Bobby’s mother.BJules Verne was born on 8 February1828 inthe French city of Nantes. From an early age, he had a fascination with exploration and discovery. When he was six, his teacher, Madame Sambin, told him stories about her husband, who disappeared while traveling the world on a ship 30 years before. She told her class that he was like Robinson Crusoe, a fictional castaway who lived on a desert island. Verne would later write stories about similar characters.In 1847, Verne was sent by his family to study law at a university in Paris, but he preferred to write novels, poems and plays. After graduating, he realized he wanted to write adventure stories based on science and technology.Thishad never been done before, but Verne was sure that it would be a success. His first story, Five Weeks in a Balloon, was published in September 1862. His career lasted for more than 40 years, during which time he wrote more than 60 gripping stories.To begin with, Verne wrote positive and optimistic books. Many of these were to be his most popular creations. Although some included fantastical elements, they were usually based in scientific fact, making them believable. These happy stories weren’t to last. As he got older, Verne became less confident in the idea that science and technology were always good for the planet. His books started to include more scientists who used technology for their own-sometimes evil - purposes. Verne died on 24 March 1905, but new books continued to be published until 1919. These stories were based on ideas Verne had written about while he was still alive, but featured new characters and plots created by his son, Michel.In the 20th century, his books were translated into more than 140 languages and several successful film versions were released. His creations have been recognized as an inspiration for many scientists and inventors. Many of the futuristic ideas from his most popular books have since come true.4. What is the purpose of Paragraph 1?A To show Verne’s discovery.B. To offer the background information of Verne.C. To tell of the adventure of Sambin’s husband.D. To explain how Verne began his writing career.5. What does the underlined word “This” refer to in Paragraph 2:A. Writing novels, poems and plays.B. Studying law.C. Graduating from university.D. Wring adventure stories.6. What can be learned about Verne’s late works?A. They covered happy elements.B. They were unbelievable stories.C. They revealed Verne’s doubt on science.D. They were partly written by Berne’s son.7. Which of the following best describes Verne?A. Talented and productive.B. Popular and caring.C. Optimistic and generous.D. Friendly and honest.CThere are similarities and differences between high school life and college life.For one thing, there are several similarities between high school life and collegelife. First, the most important task in high school and college is both studying. Studying is the most important as a student. Second, we need a goal to fight for in both high school life and college life. To lead a meaningful life, we have to set up a goal to achieve.For another, there are also some differences between high school life and college life. First, our studying is also the biggest difference. In high school, we are required to follow our teachers' steps and finish theirassignmentsevery day. While in college, there are no teachers giving such detailed requirements to us and we can choose study or not according to our own willing. What and how to study totally depends on us. Therefore, the ability of self-control is very important in college life. Second, the flexibility (灵活性) of time is another difference. In high school, we have no much leisure except for our time of study. However, in college, we have much controlled by ourselves except the time of classes. And we have more time to do what we like. Finally, college lifeis much more various and richer. Besides study, we can attend many other activities, which make ourcollege life more wonderful.In brief, there are both similarities and differences between high school life and college life. However, no matter we are in which period, we need to make full use of every day so that we will never feel regretful.8. Why do students need a goal to fight in high school and college?A. To enter a good college.B. To avoid living a meaningless life.C. To develop the ability of control.D. To meet their parents’ satisfaction.9. What does the underlined word “assignments” in paragraph 3 probably mean?A. Projects.B. Tasks.C. Goals.D. Dreams.10. Which is the correct structure of the passage?A. ①-②③-④B. ①②-③-④C. ①-②③④D.①②-③④11. Which of the following can be the best title for the text?A. College LifeB. High School LifeC. High School and CollegeD. High School Life and College LifeDBritish sculptor Jason Taylor has made it his mission to use his talent to conserve our ecosystems by creating underwater museums. Over the years, the environmentalist has put over 850 massive artworks underwater worldwide. On February 1, 2021, Taylor launched his latest work — The Underwater Museum of Cannes.―The main goal was to bring attention to the fact that our oceans need our help,‖ Taylor told Dezeen. ―Ocean ecology has been destroyed by human activity in the Mediterranean over the past few decades, and it is not obvious what is taking place when observing the sea from afar.‖The Underwater Museum of Cannes contains 6 sculptures featuring local residents of various ages. They range from Maurice, an 80-year-old fisherman, to Anouk, a 9-year-old student. Towering over 6-feet-tall and weighing 10 tons, the faces are sectioned into two parts, with the outer part like a mask. The mask indicates that the world’s oceans appear powerful and unbeatable from the surface but house an ecosystem that is extremely fragile to careless human activities.Though the waters surrounding the sculptures now appear a pristine blue, the seabed was filled with old boat engines, pipes, and other human-made trash when the project began about four years ago. Besides removingthe trash, Taylor also restored the area’s sea grass. Just one square meter of the sea grass can generate up to 10 liters of oxygen daily. The sea grass also helps prevent coastal erosion and provides habitats for many ocean creatures.―The idea of creating an underwater museum was to draw more people underwater and develop a sense of care and protection,‖ Taylor told Dezeen. ―If we threw unwanted waste near a forest, there would be a public outcry. But this is happening every day in our surrounding waters and it largely goes unnoticed.12. Why does the outer part ofthe sculptures look like a mask?A. To popularize the features of the locals.B. To remind people to protect themselves.C. To reflect people’s protection of the ocean.D. To stress the sensitiveness of the ecosystem.13. What’s paragraph 4 mainly about?A. How the project was started.B. How the sea grass was restored.C. What recovery effort the project made.D. Why the surroundings were improved.14. What can we infer from what Jason Taylor said in the last paragraph?A. The situation of the ocean is easily ignored.B. The destruction caused to the ocean is noticeable.C. Forests play a more important role in ecosystems.D. People have zero tolerance to damage done to nature.15. What might be the best title for the text?A. The Underwater Museum, a long way to go.B. The Underwater Museum, a big difference to the sea.C. The Underwater Museum, an appeal to conserve ecosystems.D. The Underwater Museum, a masterpiece of Jason Taylor.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学年贵阳一中新世界国际学校高三英语一模试卷及答案

2020-2021学年贵阳一中新世界国际学校高三英语一模试卷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.BIn the summer of 2016, I gave a talk at a small conference in northernVirginia. I began by admitting that I’d never had a social-media account; I then outlined arguments for why other peopleshould consider removing social media from their lives. The event organizers uploaded the video of my talk to YouTube. Then it was shared repeatedly on Facebook and Instagram and, eventually, viewed more than five million times. I was both pleased and annoyed by the fact that my anti-social-media talk had found such a large audience on social media.I think of this event as typical of the love-hate relationships many of us have with Facebook, Instagram, and other social-media platforms. On the one hand, we’ve grown cautious about the so-called attention economy, which, in the name of corporate(公司的) profits, destroys social life gradually and offends privacy. But we also benefit from social media and hesitate to break away from it completely. Not long ago, Imet a partner at a large law firm in Washington, D.C., who told me that she keeps Instagram on her phone because she misses her kids when she travels; looking through pictures of them makes her feel better.In recent months, some of the biggest social-media companies, Facebook and Twitter, in particular, have promised various reforms. In March, Mark Zuckerberg announced a plan to move his platform toward private communication protected by end-to-end encryption(端对端加密); later that month, he put forward the establishment of a third-party group to set standards for acceptable content.All of these approaches assume that the reformation of social media will be a complex, lengthy, and gradual process. But not everyone sees it that way. Alongside these official responses, a loose collective of developers that calls itself the IndieWeb has been creating another alternative. They are developing their own social-media platforms, which they say will preserve what’s good about social media while getting rid of what’s bad. They hope to rebuild social media according to principles that are less corporate and more humane(人道的).4. Why did the author feel annoyed when his video was spread online?A. His video caused many arguments.B. His video was shared without his permission.C. His talk was opposed by a large amount of people.D. His video’s popularity on social media is against his talk.5. Why does the author mention the story of his partner in paragraph 2?A. To prove that social media has some benefits.B. To advise people to break away from social media.C. To tell the negative effects social media may produce.D. To describe people’s complicated relationships with social media.6. What is the purpose of the reform made by some social-media companies?A. To attract more users.B. To improve network environment.C. To make more profits.D. To provide more convenientservice.7. What does the IndieWeb intend to do?A. Develop new social-media platforms.B. Remove social media from people’s lives.C. Improve the existing social-media principles.D. Help social-media companies to make reformation.CIn Colombia a group, named WebConserva, is carrying out a project in the San Lucas Mountains with the help of coffee growers.The San Lucas area is one of the most unexplored places in Colombia, which is home to many thousands of species of animals and plants. Yet gold mining and coca farming have dealt a blow to its ecosystem. To limit additional development in the San Lucas area, the group helps coffee growers by linking them with processors from around the country.Colombia has more different kinds of living things than any other country except neighboring Brazil. In 2016, the Colombian government signed a peace deal with the Revolutionary Armed Forces of Colombia ending years of civil war. As a result, more land became accessible for use, with deforestation(毁林) coming along. Government information shows that in 2017, almost 220,000 hectares of forest were destroyed compared to around 124,000 hectares in 2015.To date, the project includes 10 families who farm 400 hectares of coffee plants, which costs about $77,000 dollars a year. WebConserva hopes that, in time, 200 families will be included. At that level, 20,000 hectares of untouched forest could be protected. In San Lucas, the families promise not to cut down trees to expand their crops or to hunt wild animals from the forests. In return, they receive $ 250 to $ 300 per 125 kilograms of coffee, an enviable amount there. Arcadio Barajas is among those taking part. His new coffee plantation(种植园) makes a barrier between cattle farms and forests where wild animals like the jaguar live and hunt. In this way, he doesn'thave to kill wild animals to protect his cattle.Barajas said that pulling down the forest to plant coca and killing wildlife were against his will. Now he feels that growing coffee lets him be astewardof the land. "I'm taking care of the environment, the forest and the animals," he said.8. Why does WebConserva set up the project?A. To help local farmers make money.B. To expand areas of coffee growing.C. To link processors with coffee growers.D. To conserve biodiversity in the Mountains.9. What happened after Colombia’s civil war was over?A. Colombia helped many needy families.B. Colombia lost lots of areas of forests.C. Colombia started to save damaged forests.D. Colombia became more peaceful than Brazil.10. Which is probably a function of Barajas's coffee plantation?A. A method of protecting cattle and wildlife.B. A substitute for hunting of wild animals.C. A barrier between man and wild animals.D. A shelter for cattle against human hunters.11. What does the underlined word "steward" mean in the last paragraph?A. Farmer.B. Master.C. Guardian.D. Explorer.DA 25-year-old American with a university degree can expect to livea decade longer than a peer who dropped out of high school. Although researchers have long known that the rich live longer than the poor, this education gap is less well documented. And although the average American’s expected span(预期寿命) has been smooth in recent year—and, shockingly, even fell between 2015 and 2017—that of the one-third with a bachelor’s degree has continued to lengthen.This gap in life expectancy is growing, according to new research published in the report of the National Academy of Sciences. Anne Case and Angus Deation ofPrincetonUniversityfound that the lifespans of those withand without a bachelor’s degree started to become different in the 1990s and 2000s. This gap grew even wider in the 2010s.What is the link between schooling and longevity(长寿)? Some argue that better-educated people develop healthier lifestyles: each additional year of study reduces the chances of being a smoker and of being overweight. The better-educated earn more, which in turn is associated with greaterhealth.Ms Case and Mr Deaton argue that changes in labor markets, including the rise of automation and increased demand for highly-educated workers, coupled with the rising costs of employer-provided health care, have decreased the supply of well-paid jobs for those without a degree. This may be contributing to higher rates of alcohol and drug use, suicide and other “deaths of despair”.The authors argued that the educational gap in mortality(致死率) will widenin the wake ofthe covid-19 pandemic. ForAmerica’s overall life expectancy to start climbing again, improvements will be needed across all social groups, not just among the privileged few.12. When did the lifespans of people with and without a degree vary greatly?A. In the 1990s.B. In the 2020sC. In the 2000sD. In the 2010s13. According to the article, changes in labor markets reduce jobs for those without a degree. Which change is NOT included?A. The rising spending of employer-provided health care.B. The gap in life expectancy.C. Raised request for better-educated workers.D. The development of automation.14. What does the underlined phrase “in the wake of” probably mean ?A. afterB. untilC. beforeD. while15. What is the best title for the text?A. Changes in labor market.B. Quit bad habits by Further studyC. Educated Americans live longer.D. Highly-educated people develop healthier lifestyles.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学年贵阳一中新世界国际学校高三生物一模试题及参考答案

2020-2021学年贵阳一中新世界国际学校高三生物一模试题及参考答案一、选择题：本题共15小题，每小题2分，共30分。

每小题只有一个选项符合题目要求。

1. 中枢神经系统包括（）A. 脑和脊髓B. 脑和脑神经C. 大脑和小脑D. 脑神经和脊神经2. 图中横坐标甲、乙、丙、丁表示某种哺乳动物（2n）在有性生殖过程中某些时期的细胞。

图中a、b、c 表示各种结构或物质在不同时期的数量变化，可以与图中甲、乙、丙、丁相对应的细胞是（）A. 初级精母细胞、次级精母细胞、精细胞、精子B. 精原细胞、初级精母细胞、次级精母细胞、精细胞C. 卵原细胞、次级卵母细胞、第一极体、第二极体D. 卵原细胞、初级卵母细胞、次级卵母细胞、第一极体3. 下列有关生物体中化合物的叙述，正确的是（）A.淀粉、糖原和纤维素彻底水解之后，得到的产物是不同的B.性激素在体液调节中发挥作用，其元素组成与磷脂的不同C.DNA和蛋白质分子的多样性都与分子的空间结构密切相关D.多聚体水解的过程，需要水分子参与并消耗一定量的ATP4. 下列相关实验的叙述中，正确的是A.用淀粉酶、糖和淀粉为材料证明“酶的专一性”时;可以用斐林试剂对反应产物进行检测B.洋葱鮮片叶的外表皮，既可以用于观察DNA和RNA在细胞中的分布，也可以用于观察植物细胞的质壁分离和复原现象C.在观察洋葱根尖细胞的有丝分裂的实验中，盐酸的作用是增大细胞膜对染色剂的通透性并使DNA与蛋白质分开D.向一个密闭玻璃容器中的绿色植物提供C18O2和H218O，用以探究氧气中氧元素的来源5. 下列关于细胞结构和功能的叙述，错误的是（）A. 线粒体为细胞生命活动提供能量B. 核糖体是蛋白质加工的场所C. 叶绿体是进行光合作用的场所D. 细胞膜能控制物质进出细胞6. 当细胞新陈代谢旺盛、生长迅速时，结合水与自由水的比值将( )A. 保持不变B. 降低C. 升高D. 不能确定7. 脂肪酸是由碳、氢、氧三种元素组成的一类化合物，是脂肪、磷脂和糖脂的主要成分，在脂肪酸浓度较低时需要脂肪酸转运蛋白介导的转运系统来实现跨膜运输。

贵州省贵阳市新世界国际学校2024—2025学年第一次月考九年级数学测试卷

贵州省贵阳市新世界国际学校2024—2025学年第一次月考九年级数学测试卷一、单选题1．计算()21--的结果是（）A ．3-B ．1-C ．1D ．32．甲骨文是我国目前发现最早的文字，其显著特点是图画性强，下列甲骨文图画是轴对称图形的是（）A ．B ．C ．D ．3．截至2023年底，贵州中药种植面积约5300平方千米，种植面积居全国第二，将数据5300用科学记数法表示为（）A ．25310⨯B ．35.310⨯C ．35.310-⨯D ．45310´4．小星参加学校举行的十佳歌手比赛，7位评委给他打分得到一组数据，为了比赛更加公平，这组数据要去掉一个最高分和一个最低分得到一组新数据，比较两组数据．一定不会发生变化的统计量是（）A ．平均数B ．众数C ．中位数D ．方差5．在一个不透明的口袋中装有5个红球和若干个白球，它们除颜色外其余均相同，通过多次摸球实验后发现，摸到红球的频率稳定在0.2附近，则估计口袋中的总球数大约是（）A ．15B ．20C ．25D ．306．计算2222a aa a -+++的结果为（）A ．1B ．1-C ．()222a a ++D ．22a a+-7．如图，ABCD 中()AB BC <，以B 为圆心，任意长为半径作弧，分别交BC ，BA 于点F ，G ，再分别以F ，G 为圆心，大于12FG 的长为半径作弧，两弧交于点H ，作射线BH ，交AD边于点E ．若110A ∠=︒，则AEB ∠的度数是（）A ．70︒B ．60︒C ．45︒D ．35︒8．小红用四根相同长度的木条制作了一个四边形学具（如图①），测得其对角线AC 的长为6cm ，60ABC ∠=︒．根据四边形的不稳定性，她将其变成了另一个四边形学具（如图②），使90ABC ∠=︒，则图②中对角线AC 的长为（）A ．B ．C ．6D ．9．用配方法解方程2850x x -+=，将其化为()2x a b +=的形式，则a b +的值为（）A ．15B ．7C ．－1D ．110．关于x 的一元二次方程2310kx x +-=有实数根，则k 的取值范围是（）A ．94k ≤-B ．94k ≥-C ．94k ≤-且0k ≠D ．94k ≥-且0k ≠11．如图，正方形ABCD 和正方形CEFG 中，点D 在CG 上，1,3BC CE ==，H 是AF 的中点，那么CH 的长是（）A ．2.5B CD ．212．如图，在正方形ABCD 内有一点F ，连接AF ，CF ，有AF AB =，若BAF ∠的角平分线交BC 于点E ，若E 为BC 中点，2CF =，则AD 的长为（）A ．B ．4C ．D ．2.5二、填空题13．方程()()210x x +-=的根为．14．在平面直角坐标系中，已知点()3,0A ，()0,0B ，()1,2C ，则以A ，B ，C 为顶点的平行四边形ABCD 的第四个顶点D 的坐标为．15．设AB ，CD ，EF 是同一平面内三条互相平行的直线，已知AB 与CD 的距离是12cm ，EF 与CD 的距离是5cm ，则AB 与EF 的距离等于cm ．16．如图，在正方形ABCD 中，4AB =，点E ，F 分别为,AD AB 上一点，且DE BF =，连接,BE CF ，则BE CF +的最小值为．三、解答题17．用适当的方法解下列方程：(1)()5315x x x -=-；(2)22950y y -+=．18．某学校在本校开展了四项“课后服务”项目（项目A ．足球；项目B ．篮球；项目C ．跳绳；项目D ．书法），要求每名学生必须选修且只能选修其中一项，为了解学生的选修情况，学校决定进行抽样调查，请根据图中提供的信息解答下列问题：(1)在这次问卷调查中，一共调查了_________名学生，请将条形统计图补充完整．(2)扇形统计图中a =___________，D 所对的圆心角的度数为____________．(3)学校拟对选修项目D ．书法的同学进行培训，若该校有2000名学生，请通过计算估计该校需要培训的学生人数．19．如图，在平行四边形ABCD 中，AE 是BC 边上的高，点F 是DE 的中点，AB 与AG 关于AE 对称，AE 与AF 关于AG 对称．（1）求证：△AEF 是等边三角形；（2）若AB =2，求△AFD 的面积．20．如图，在ABCD 中，BE 平分ABC ∠，CE 平分BCD ∠，BF CE ∥，CF BE ∥，BC EF ,交于点O ．(1)判断四边形BFCE 的形状，并说明理由；(2)若过点E 作EG BC ∥交DC 于点G ，画出线段EG ，判断线段EG 与EF 的数量关系，并说明理由．21．某公司不定期为员工购买某预制食品厂生产的杂酱面、牛肉面两种食品．(1)该公司花费3000元一次性购买了杂酱面、牛肉面共170份，此时杂酱面、牛肉面的价格分别为15元、20元，求购买两种食品各多少份？(2)由于公司员工人数和食品价格有所调整，现该公司分别花费1260元、1200元一次性购买杂酱面、牛肉面两种食品，已知购买杂酱面的份数比牛肉面的份数多50％，每份杂酱面比每份牛肉面的价格少6元，求购买牛肉面多少份？22．某学校计划利用一片空地为学生建一个面积为280m 的矩形车棚，其中一面靠墙（墙的可用长度为12m ），已知现有的木板材料可使新建板墙的总长为26m ．(1)根据学校的要求，在与墙平行的一面开一个2米宽的门（如图1），那么这个矩形车棚相邻两边长分别为多少米；(2)如图2，为了方便学生取车，施工单位决定在车棚内修建几条等宽的小路，使得停放自行车的面积为254m ，那么小路的宽度为多少米．23．一次函数23y mx m =++的图象与12y x =-的图象交于点C ，且点C 的横坐标为3-，与x 轴、y 轴分别交于点A 、点B ．(1)求m 的值与A 的长；(2)若点Q 为线段OB 上一点，且14OCQ BAO S S =△△，求点Q 的坐标．24．阅读下面的材料：解方程x 4﹣5x 2＋4＝0，这是一个一元四次方程，根据该方程的特点，它的解法通常采用换元法降次：设x 2＝y ，那么x 4＝y 2，于是原方程可变为y 2﹣5y ＋4＝0，解得y 1＝1，y 2＝4.当y 1＝1时，x 2＝1，∴x ＝±1；当y 2＝4时，x 2＝4，∴x ＝±2；∴原方程有四个根：x 1＝1，x 2＝﹣1，x 3＝2，x 4＝﹣2仿照上述换元法解下列方程：(1)x 4＋3x 2﹣4＝0(2)1610.1x xx x +-+=+．25．如图，在等腰△ABC 中90BAC ∠=︒，点D 为直线BC 上一动点（点D 不B 、C 重合），以AD 为边向右侧作正方形ADEF ，连接CF ．【猜想】如图①，当点D 在线段BC 上时，直接写出CF 、BC 、CD 三条线段的数量关系．【探究】如图②，当点D 在线段BC 的延长线上时，判断CF 、BC ，CD 三条线段的数量关系，并说明理由．【应用】如图③，当点D 在线段BC 的反向延长线上时，点A 、F 分别在直线BC 两侧，AE ．DF交点为点O 连接CO ，若AB =1CF =，则CO =．。

2020-2021学年九年级上学期第一次半月考试数学试题(B卷 )

2020～2021(上)九年级第一次半月考数学试卷（B卷）(2020.8.31)（本卷满分150分，请在答题卷上作答）命题人：一．选择题（10题，每题4分，共40分）1．下列式子一定是二次根式的是（）A ．B ．C ．D ．2．二次根式的值等于（）A．±2 B．﹣2 C．2 D．43．下列各式中，，，，，，中，最简二次根式有（） A．2个B．3个C．4个D．5个4．设a＝6，b ＝，c ＝+，则a，b，c的大小关系是（）A．b＞c＞a B．b＞a＞c C．c＞a＞b D．a＞c＞b5．下列方程是一元二次方程的是（）A．2x+1＝0 B．x2﹣3x+1＝0 C．x2+y＝1 D ．6．若n（n≠0）是关于x的方程x2+mx+n＝0的根，则m+n的值为（）A．0 B．1 C．﹣1 D．﹣27．一元二次方程x2+4x﹣1＝0经过配方后可变形为（）A．（x﹣2）2＝3 B．（x﹣2）2＝5 C．（x+2）2＝3 D．（x+2）2＝58．（a﹣1）变形正确的是（）A．﹣1 B ．C ．﹣D ．﹣9．我国南宋著名数学家秦九韶在他著作《数书九章》一书中，给出了著名的秦九韶式，也叫三斜求积公式，即如果一个三角形的三边分别为a，b，c，S为面积，则该三角形的面积公式为S ＝，已知△ABC的三边分别是3，和，则△ABC的面积是（）A ．B ．C．2D．310．已知等腰三角形的两边长分别是一元二次方程x2﹣6x+8＝0的两根，则该等腰三角形的底边长为（）A．2 B．4 C．8 D．2或4二．填空题（共6小题，每题5分，共30分））11．若关于x 的代数式有意义，则实数x 的取值范围是．12．实数m，n在数轴上的位置如图所示，化简：＝．13．如图，从一个矩形中截去面积分别为2cm2和8cm2的两个正方形，则剩下的两个小矩形的面积之和（图中阴影部分的面积）为cm2．14．已知一元二次方程x2+2x+m＝0的一个根是﹣1，则m的值为．15．一个三角形的两边长分别为2和5，第三边长是方程x2﹣8x+12＝0的根，则该三角形的周长为．16．已知m是方程x2﹣2018x+1＝0的一个根，则代数式m2﹣2017m++3的值等于．三．解答题（10小题，80分）17．（6分）计算：﹣+（π﹣2020）0+÷．18．（6分）计算：4÷3•2a．2020-20201(上)九年级第一次半月考数学B卷第1页共4页 2020-20201(上)九年级第一次半月考数学B卷第2页共4页19．解下列一元二次方程（12分）（1）x2﹣25＝0．（2）x2﹣4x﹣5＝0．20.（6分）用配方法解方程x2﹣2x﹣1＝0．21．（8分）已知a ＝+2，b ＝﹣2．求下列式子的值：（1）a2b+ab2；（2）（a﹣2）（b﹣2）．22．（8分）若﹣＝（x﹣y）2，求x﹣y的值．23．（8分）已知关于x的方程（m2﹣1）x2+（m﹣1）x﹣2＝0．（1）当m为何值时，该方程为一元二次方程？（2）当m为何值时，该方程为一元一次方程？24.（8分）观察、发现：；…．（1）试化简：；（2）直接写出：＝；（3）求值：．25．（8分）已知|2018﹣m|+＝m，求m﹣20182的值．26．（10分）若m是方程x2+x﹣1＝0的一个根，求代数式m3+2m2+2019的值．2020-20201(上)九年级第一次半月考数学B卷第3页共4页 2020-20201(上)九年级第一次半月考数学B卷第4页共4页。

2021年贵阳一中新世界国际学校高三语文第一次联考试题及答案解析

2021年贵阳一中新世界国际学校高三语文第一次联考试题及答案解析一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字，完成下面小题。

当地名进入古诗彭程一①在我个人的经验中，面对地图时，也总是古诗词最能够以生动的姿态呈现的时刻。

②目光摩挲过一个个地名，旁边那些或大或小的圆圈或圆点，在幻觉中次第打开。

仿佛是岩溶地带大山峭壁之上的洞穴，外部看去并不大，一旦进入，却会发现溶洞宽阔，石笋奇诡，暗河幽深。

这些或熟悉或陌生的地名下，藏匿着自然、历史、民俗……一个物质和精神的丰富浩大的谱系。

而与这种感觉几乎同步，此时耳畔也总是会响起古诗词铿锵有力或婉转悠扬的音调，在眼前幻化成为一幅幅画面。

③譬如此刻，目光所及之处，是甘肃武威。

西汉初，武威为匈奴所占据。

公元121年，汉武帝派骠骑大将军霍去病两次远征河西，大败匈奴，为彰显大汉的“武功军威”而命名此地。

不过在漫长岁月中，它更为人知的名字是凉州。

凉州，地名二字中已经有了凛冽的寒意，入诗，更是漫溢出边地的荒凉和戍人的哀愁。

甚至“凉州词”在唐代成为专门的曲调，很多诗人依调填词：“羌笛何须怨杨柳，春风不度玉门关”；“坐看今夜关山月，思杀边城游侠儿”；“白石黄沙古战场，边风吹冷旅人裳”……从汉唐到明清，一片愁云惨雾，飘荡舒卷在西北大漠戈壁之上。

④如果一个地方是一只瓷器，诗词便是表面上闪亮的釉彩。

因为这些诗句，一个原本抽象单调的地名变得具体而生动，有了色彩、声音和气息。

一行诗句便是一条通道，让我得以穿越时光的漫漫长廊，驰目于辽阔的天空和大地，徜徉在幽静的山林和庭院，欣赏四时风光，感受八方习俗。

二①爱默生说过：诗人是为万物重新命名者。

有一些地方，虽然早已经地老天荒地存在着，但长时间里都只是一种物质形态的面貌，枯燥粗糙。

只有在经过文人墨客的描绘后，才变得具有精神性。

诗文是一种加持，为地名灌注了灵动的气质。

仿佛出色的匠人手里捏出的泥人，被吹拂进了生命的气息，活灵活现。

于是一切大为不同。

2020-2021学年贵阳市乐湾国际学校初三数学第一学期第一次月考试卷及解析

2020-2021学年贵阳市乐湾国际学校初三数学第一学期第一次月考试卷一、选择题（每小题3分，共36分） 1．（3分）16的算术平方根是( ) A ．4B ．4-C ．4±D ．22．（3分）如图，由6个相同的小正方体组合成一个立体图形，它的俯视图为( )A ．B ．C ．D ．3．（3分）如图，与1∠是同位角的是( )A ．2∠B ．3∠C ．4∠D ．5∠4．（3分）掷一枚质地均匀的硬币5次，其中3次正面朝上，2次正面朝下，则再次掷出这枚硬币，正面朝下的概率是( ) A ．1B ．25C ．35D ．125．（3分）小乐用一块长方形硬纸板在阳光下做投影实验，通过观察，发现这块长方形硬纸板在平整的地面上不可能出现的投影是( ) A ．三角形B ．线段C ．矩形D ．平行四边形6．（3分）如果a b <，0c <，那么下列不等式中不成立的是( ) A ．a c b c +<+ B ．ac bc >C ．11ac bc +>+D ．22ac bc >7．（3分）函数2x y +=x 的取值范围是( ) A ．2x >-B ．2x -C ．2x >-且1x ≠D ．2x -且1x ≠8．（3分）若关于x 的方程20x x m --=没有实数根，则m 的值可以为( )A ．1-B ．14-C ．0D ．19．（3分）如图，正方形ABCD 内接于O ，O 的直径为2分米，若在这个圆面上随意抛一粒豆子，则豆子落在正方形ABCD 内的概率是( )A ．2πB ．2π C ．12πD ．2π10．（3分）如图所示，四边形ABCD 是边长为4cm 的正方形，动点P 在正方形ABCD 的边上沿着A B C D →→→的路径以1/cm s 的速度运动，在这个运动过程中APD ∆的面积2()s cm 随时间()t s 的变化关系用图象表示，正确的是( )A ．B ．C ．D ．11．（3分）如图，在ABCD 中，4CD =，60B ∠=︒，:2:1BE EC =，依据尺规作图的痕迹，则ABCD 的面积为( )A ．12B ．122C ．123D ．12512．（3分）已知二次函数221y ax ax =+-（其中x 是自变量），当1x 时，y 随x 的增大而减小，且32x -时，y 的最小值为9-，则a 的值为( ) A ．1-B ．43-C ．83-D ．103-二、填空题（每小题4分，共16分） 13．（4分）计算：32(10)(5)mn mn ÷= ．14．（4分）图①中特种自行车的轮子形状为“勒洛三角形”，图②是其一个轮子的示意图，“勒洛三角形”是分别以等边三角形ABC 三个顶点A ，B ，C 为圆心，以边长为半径的三段弧围成的图形．若这个等边三角形ABC 的边长为30cm ，则这种自行车一个轮子的周长为 cm ．15．（4分）已知反比例函数5y x=在第一象限的图象如图所示，点A 在其图象上，点B 为x 轴正半轴上一点，连接AO 、AB ，且AO AB =，则AOB S ∆= ．16．（4分）如图：已知10AB =，点C 、D 在线段AB 上且2AC DB ==；P 是线段CD 上的动点，分别以AP 、PB 为边在线段AB 的同侧作等边AEP ∆和等边PFB ∆，连接EF ，设EF 的中点为G ；当点P 从点C 运动到点D 时，则点G 移动路径的长是．三、解答题（共98分）17．（8分）先化简，再求值：2221221()(2)1144a a a a a a a a +-+-++-++，其中2a =．18．（10分）如图，在ABC ∆中，90ACB ∠=︒，30CAB ∠=︒，以线段AB 为边向外作等边ABD ∆，点E 是线段AB的中点，连接CE并延长交线段AD于点F．（1）求证：四边形BCFD为平行四边形；（2）若6AB=，求平行四边形BCFD的面积．19．（10分）广元市某中学举行了“禁毒知识竞赛”，王老师将九年级（1）班学生成绩划分为A、B、C、D、E五个等级，并绘制了图1、图2两个不完整的统计图，请根据图中的信息解答下列问题：（1）求九年级（1）班共有多少名同学？（2）补全条形统计图，并计算扇形统计图中的“C”所对应的圆心角度数；（3）成绩为A类的5名同学中，有2名男生和3名女生；王老师想从这5名同学中任选2名同学进行交流，请用列表法或画树状图的方法求选取的2名同学都是女生的概率．20．（10分）如图，海岛B在海岛A的北偏东30方向，且与海岛A相距20海里，一艘渔船从海岛B出发，以5海里/时的速度沿北偏东75︒方向航行，同时一艘快艇从海岛A出发，向正东方向航行．2小时后，快艇到达C处，此时渔船恰好到达快艇正北方向的E处．（1）求ABE∠的度数；（2）求快艇的速度及C，E之间的距离．≈（参考数据：sin150.26︒≈3 1.73)︒≈，tan150.27︒≈，cos150.9721．（10分）小明购买A 、B 两种商品，每次购买同一种商品的单价相同，具体信息如表，根据信息解答下列问题：次数购买数量（件)购买总费用（元)AB第一次 2 1 55 第二次1365（1）求A ，B 两种商品的单价；（2）若第三次购买这两种商品共12件，且A 种商品的数量不少于B 种商品数量的2倍，请设计出最省钱的购买方案，并说明理由．22．（10分）如图，AB 是O 的直径，点D 在O 上，E 是BD 的中点，OE 交O 的切线BC 于点C ．（1）求证：CD 是O 的切线；（2）若sin 0.8BAD ∠=，O 的半径为2，求线段CD 的长．23．（12分）工匠制作某种金属工具要进行材料煅烧和锻造两个工序，即需要将材料烧到800C ︒，然后停止煅烧进行锻造操作，经过8min 时，材料温度降为600C ︒．如图，煅烧时温度(C)y ︒与时间()x min 成一次函数关系；锻造时，温度(C)y ︒与时间()x min 成反比例函数关系．已知该材料初始温度是32C ︒．（1）分别求出材料煅烧和锻造时y 与x 的函数关系式，并且写出自变量x 的取值范围；（2）根据工艺要求，当材料温度低于400C ︒时，须停止操作．那么锻造的操作时间最多有多长？（3）如果加工每个零件需要锻造12分钟，并且当材料温度低于400C ︒时，需要重新煅烧．通过计算说明加工第一个零件，一共需要多少分钟．24．（14分）如图1，正方形ABCD 和正方形AEFG ，连接DG ，BE ．（1）[发现]：当正方形AEFG 绕点A 旋转，如图2，线段DG 与BE 之间的数量关系是；位置关系是；（2）[探究]：如图3，若四边形ABCD 与四边形AEFG 都为矩形，且2AD AB =，2AG AE =，猜想DG 与BE 的数量关系与位置关系，并说明理由；（3）[应用]：在（2）情况下，连接GE （点E 在AB 上方），若//GE AB ，且5AB =，1AE =，求线段DG 的长．25．（14分）在平面直角坐标系中，抛物线2y ax bx c =++与y 轴交于点(0,4)A 、与x 轴交于点(2,0)B ，(1,0)C -．（1）求抛物线的函数表达式；（2）若点D 在第一象限的抛物线上，过点D 作直线AB 的垂线段DE ，E 为垂足，求DE 的最大值；（3）如图3，将抛物线在AB 上方的图象沿AB 折叠后与y 轴交于点F ，求点F 的坐标．参考答案与试题解析一、选择题（每小题3分，共36分） 1．【解答】解：2416=， 16∴的算术平方根是4，故选：A ．2．【解答】解：从上面看可得四个并排的正方形，如图所示：故选：D ．3．【解答】解：观察图形可知，与1∠是同位角的是4∠．故选：C ．4．【解答】解：掷质地均匀硬币的试验，每次正面向上和向下的概率相同，∴再次掷出这枚硬币，正面朝下的概率是12．故选：D ．5．【解答】解：将长方形硬纸的板面与投影线平行时，形成的影子为线段；将长方形硬纸板与地面平行放置时，形成的影子为矩形；将长方形硬纸板倾斜放置形成的影子为平行四边形；由物体同一时刻物高与影长成比例，且长方形对边相等，故得到的投影不可能是三角形．故选：A ．6．【解答】解：A 、由a b <，0c <得到：a c b c +<+，原变形正确，故此选项不符合题意；B 、由a b <，0c <得到：ac bc >，原变形正确，故此选项不符合题意；C 、由a b <，0c <得到：11ac bc +>+，原变形正确，故此选项不符合题意；D 、由a b <，0c <得到：22ac bc <，原变形错误，故此选项符合题意．故选：D ．7．【解答】解：根据题意得：2010x x +⎧⎨-≠⎩解得：2x -且1x ≠．故选：D ．8．【解答】解：关于x 的方程20x x m --=没有实数根，∴△2(1)41()140m m =--⨯⨯-=+<，解得：14m <-，故选：A ．9．【解答】解：因为O 的直径为2分米，则半径为22分米，O 的面积为22()22ππ=平方分米；正方形的边长为2222()()122+=分米，面积为1平方分米；因为豆子落在圆内每一个地方是均等的，所以()122ABCD P ππ==豆子落在正方形内．故选：A ．10．【解答】解：点P 在AB 上运动时，APD ∆的面积s 将随着时间的增多而不断增大，排除B ．点P 在BC 上运动时，APD ∆的面积s 随着时间的增多而不再变化，应排除A 和C ．故选：D ．11．【解答】解：如图，过点A 作AH BC ⊥于H ，由作图可知，EF 垂直平分线段ABEA EB ∴=，60B ∠=︒，ABE ∴∆是等边三角形， AB BE AE ∴==，四边形ABCD 是平行四边形， 4AB CD ∴==，4BE AB ∴==， AH BE ⊥， 2BH EH ∴==，22224223AH AB BH ∴-=-= :2:1BE EC =，2EC ∴=，6BC BE EC =+=，∴平行四边形ABCD 的面积BC AH =⋅=，故选：C ．12．【解答】解：二次函数221y ax ax =+-（其中x 是自变量），∴对称轴是直线212ax a=-=-，当1x 时，y 随x 的增大而减小， 0a ∴<，32x -时，y 的最小值为9，2x ∴=时，4419y a a =+-=-， 1a ∴=-．故选：A ．二、填空题（每小题4分，共16分） 13．【解答】解：32(10)(5)2mn mn n ÷=．故答案为：2n ．14．【解答】解：自行车一个轮子的周长6030330()180cm ππ=⨯=．故答案为30π．15．【解答】解：过点A 作AC OB ⊥于点C ， AO AB =， CO BC ∴=，点A 在其图象上，∴12.52AC CO ⨯=， ∴12.52AC BC ⨯=， 5AOB S ∆∴=．故答案为5．16．【解答】解：如图，分别延长AE 、BF 交于点H ．60A FPB ∠=∠=︒，//AH PF ∴，60B EPA ∠=∠=︒，//BH PE ∴，∴四边形EPFH 为平行四边形，EF ∴与HP 互相平分． G 为EF 的中点，G ∴正好为PH 中点，即在P 的运动过程中，G 始终为PH 的中点，所以G 的运行轨迹为三角形HCD 的中位线MN ．10226CD =--=，3MN ∴=，即G 的移动路径长为3．三、解答题（共98分）17．【解答】解：原式2212(1)[](2)1(1)(1)(2)a a a a a a a +-=-+++-+ 11[](2)1(1)(2)a a a a a -=-++++ 2111a a a a +-=-++ 31a =+，当2a =时，原式3121==+． 18．【解答】（1）证明：在ABC ∆中，90ACB ∠=︒，30CAB ∠=︒， 60ABC ∴∠=︒．在等边ABD ∆中，60BAD ∠=︒，60BAD ABC ∴∠=∠=︒． E 为AB 的中点，AE BE ∴=．又AEF BEC ∠=∠，AEF BEC ∴∆≅∆．在ABC ∆中，90ACB ∠=︒，E 为AB 的中点，12CE AB ∴=，12BE AB =． CE AE ∴=，30EAC ECA ∴∠=∠=︒，60BCE EBC ∴∠=∠=︒．又AEF BEC ∆≅∆，60AFE BCE ∴∠=∠=︒．又60D ∠=︒，60AFE D ∴∠=∠=︒．//FC BD ∴．又60BAD ABC ∠=∠=︒，//AD BC ∴，即//FD BC ．∴四边形BCFD 是平行四边形．（2）解：在Rt ABC ∆中，30BAC ∠=︒，6AB =，132BC AB ∴==，AC =3BCFD S ∴=⨯=平行四边形．19．【解答】解：（1）由题意可知九年级（1）班共有学生人数为1020%50÷=（名)；（2）D等级的人数为5051015713----=（名)，补全条形统计图如图1所示：扇形统计图中C等级所对应扇形的圆心角15 36010850=⨯=︒；（3）画树状图如图：所有等可能的情况有20种，其中恰好抽中2名同学都是女生的情况有6种，∴恰好选到2名同学都是女生的概率63 2010==．20．【解答】解：（1）过点B作BD AC⊥于点D，作BF CE⊥于点F，由题意得，30NAB∠=︒，75GBE∠=︒，//AN BD ，30ABD NAB ∴∠=∠=︒，而180********DBE GBE ∠=︒-∠=︒-︒=︒， 30105135ABE ABD DBE ∴∠=∠+∠=︒+︒=︒；（2）5210BE =⨯=（海里），在Rt BEF ∆中，907515EBF ∠=︒-︒=︒，sin15100.26 2.6EF BE ∴=⨯︒≈⨯=（海里）， cos15100.979.7BF BE =⨯︒≈⨯=（海里），在Rt ABD ∆中，20AB =，30ABD ∠=︒， 1sin3020102AD AB ∴=⨯︒=⨯=（海里），cos302010 1.7317.3BD AB =⨯︒==≈⨯=（海里）， BD AC ⊥，BF CE ⊥，CE AC ⊥，90BDC DCF BFC ∴∠=∠=∠=︒，∴四边形BDCF 为矩形，9.7DC BF ∴==，17.3FC BD ==（海里）， 109.719.7AC AD DC ∴=+=+=（海里）， 2.617.319.9CE EF CF =+=+=（海里），设快艇的速度为v 海里/小时，则19.79.852v ==（海里/小时）．答：快艇的速度为9.85海里/小时，C ，E 之间的距离约为19.9海里．21．【解答】解：（1）设A 种商品的单价为x 元，B 种商品的单价为y 元，根据题意可得： 255365x y x y +=⎧⎨+=⎩，解得：2015x y =⎧⎨=⎩，答：A 种商品的单价为20元，B 种商品的单价为15元；（2）设第三次购买商品A 种a 件，则购买B 种商品(12)a -件，根据题意可得： 2(12)a a -，得：812a ，2015(12)5180m a a a =+-=+∴当8a =时所花钱数最少，即购买A 商品8件，B 商品4件．22．【解答】（1）证明：连接OD ．E 是BD 的中点，BOC DOC BAD ∴∠=∠=∠，在BOC ∆和DOC ∆中，OC OC BOC DOC OB OD =⎧⎪∠=∠⎨⎪=⎩，()BOC DOC SAS ∴∆≅∆，BOC ODC ∴∠=∠，又CB 是O 的切线，OB 是半径， 90OBC ∴∠=︒，90ODC ∴∠=︒，CD ∴与O 相切．（2）解：连接BD ，则ABD ∆是直角三角形，90ADB ∠=︒，sin 40.8 3.2BD AB BAD ∴=∠=⨯=， ∴2222124 3.2 2.45AD AB BD =-=-=，∴ 3.24tan 2.43BD BAD AD ∠===，在Rt ODC ∆中，48tan 233CD OD DOC =∠=⨯=． 23．【解答】解：（1）材料锻造时，设(0)k y k x=≠，由题意得6008k =，解得4800k =，当800y =时，4800800x=，解得6x =，∴点B 的坐标为(6,800)，材料煅烧时，设32(0)y ax a =+≠，由题意得800632a =+，解得128a =，∴材料煅烧时，y 与x 的函数关系式为12832(06)y x x =+． ∴锻造操作时y 与x 的函数关系式为4800(6)y x x=>；（2）把400y =代入4800y x=中，得12x =， 1266()min -=，答：锻造的操作时间6min ；（3）当400y =时，由12832400x +=， 238x ∴=，从400C ︒升到800C ︒需要23256()88min -=，加工每个零件需要12min ，每次锻造6min ， ∴加工第一个零件需要锻造、煅烧两次，一共需要2516912688min ++=．24．【解答】解：（1）DG BE =，DG BE ⊥，理由如下：四边形ABCD 和四边形AEFG 是正方形， AE AG ∴=，AB AD =，90BAD EAG ∠=∠=︒， BAE DAG ∴∠=∠，()ABE ADG SAS ∴∆≅∆，BE DG ∴=；如图2，延长BE 交AD 于Q ，交DG 于H ， ABE DAG ∆≅∆，ABE ADG ∴∠=∠，90AQB ABE ∠+∠=︒，90AQB ADG ∴∠+∠=︒，AQB DQH ∠=∠，90DQH ADG ∴∠+∠=︒，90DHB ∴∠=︒，BE DG ∴⊥，故答案为：DG BE =，DG BE ⊥；（2）2DG BE =，BE DG ⊥，理由如下：如图3，延长BE 交AD 于K ，交DG 于H ，四边形ABCD 与四边形AEFG 都为矩形， BAD EAG ∴∠=∠，BAE DAG ∴∠=∠，2AD AB =，2AG AE =， ∴12AB AE AD AG ==，ABE ADG ∴∆∆∽， ∴12BE AB DG AD ==，ABE ADG ∠=∠， 2DG BE ∴=，90AKB ABE ∠+∠=︒，90AKB ADG ∴∠+∠=︒，AKB DKH ∠=∠，90DKH ADG ∴∠+∠=︒，90DHB ∴∠=︒，BE DG ∴⊥；（3）如图4，（为了说明点B ，E ，F 在同一条线上，特意画的图形）设EG 与AD 的交点为M ，//EG AB ，90DME DAB ∴∠=∠=︒，在Rt AEG ∆中，1AE =，22AG AE ∴==，根据勾股定理得：EG 5AB =EG AB ∴=，//EG AB ，∴四边形ABEG 是平行四边形，//AG BE ∴，//AG EF ，∴点B ，E ，F 在同一条直线上，如图5， 90AEB ∴∠=︒，在Rt ABE ∆中，根据勾股定理得，2BE ，由（2）知，ABE ADG ∆∆∽， ∴12BE AB DG AD ==，即212DG =，4DG ∴=．25．【解答】解：（1）抛物线与x 轴交于点(2,0)B ，(1,0)C -， ∴设(2)(1)y a x x =-+，将点(0,4)A 代入，得：24a -=，解得：2a =-，22(2)(1)224y x x x x ∴=--+=-++； ∴该抛物线的函数表达式为2224y x x =-++；（2）如图1，过点D 作DM x ⊥轴于点M ，交AB 于点N ，设直线AB 的解析式为y kx b =+，(0,4)A ，(2,0)B ，∴420b k b =⎧⎨+=⎩，解得：24k b =-⎧⎨=⎩， ∴直线AB 的解析式为24y x =-+，设点2(,224)D m m m -++，则点(,24)N m m -+， 22224(24)24DN m m m m m ∴=-++--+=-+，在RtAOB 中，AB == DE AB ⊥，DM x ⊥轴，90DEN DMB ∴∠=∠=︒，90EDN END MBN MNB ∴∠+∠=∠+∠=︒， END MNB ∠=∠，EDN MBN ∴∠=∠，又90DEN AOB ∠=∠=︒，EDN OBA ∴∆∆∽， ∴DE DN OB AB=， ∴22DE =221)DE m ∴=-，∴当1m =时，DE ；（3）如图2，在AB 上方的抛物线图象上取点F 关于AB 的对称点F '，过点F '作y 轴的平行线交直线AB 于点G ，连接F A '，由题意得：FAB F AB ∠=∠'，F A FA '=， //AO F G '，FAB F GA ∴∠=∠'，F AB F GA ∴∠'=∠'，F A FG ∴'='，第21页（共21页）22F A F G ∴'='，直线AB 的解析式为24y x =-+， ∴设点2(,224)F n n n '-++，则(,24)G n n -+， 224F G n n ∴'=-+，2222222(2244)(22)F A n n n n n n '=+-++-=+-+， 22222(22)(24)n n n n n ∴+-+=-+，解得：10n =（舍去），2118n =， 5532F G ∴'=， 5532F A FG FA ∴'='==， 557343232OF OA AF ∴=-=-=， 73(0,)32F ∴．。

2020年贵阳一中新世界国际学校高三英语一模试卷及答案

2020年贵阳一中新世界国际学校高三英语一模试卷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AStepping Out Into NatureThe classic road trip is more popular than ever. Here are several places to hit the open road.Colo-road TripsThe Colorado Tourism Office has made it easy for road-trippers to explore the state’s 24 Scenic & Historic Byways.A new microsite includes-an interactive map that enables travelers to explore options by region, interest or season. Travelers seeking inspiration can also access insider tips and side-trip suggestions for historic attractions, active adventures and highlight cultural opportunities.TheBeartooth Highway.Visitors of this extraordinary byway experience the grand sights ofMontana,WyomingandYellowstonePark. The windy 68-mile stretch introduces road explorers to one of the most diverse ecosystems accessible by auto. Breathtakingly beautiful, this All-American Road showcases wide, high alpine plateaus（高原）, painted with ice blue lakes, forested valleys, waterfalls and wildlife.SewardHighway,AlaskaThe road that connectsAnchorageto Seward is 127-mile treasure of natural beauty, wildlife and stories of adventure. The drive begins at the base of theChugach Mountains, hugs the scenic shores of Turnagain Arm and winds through gold mining towns, national forests and fishing villages. Expect waterfalls, glaciers, eagles and some good bear stories.The Lighthouse Trail,MaineTravel the 375 miles betweenKitteryandCalais,Maine, visiting lighthouses along the way. Hear tales of shipwrecks（海难）and of the difficult and lonely life led by those who kept the lights burning brightly. If possible, visit theMaineLighthouseMuseum. where artifacts and hands-on exhibits for children provide an appealing break.1.What makes Colo-road Tips special?A.Good bear stories.B.A scenic beach.C.Hands-on exhibits.D.An interactive map.2.Where can you explore state of gold miners?A.Colorado.B.Montana.C.Alaska.D.Maine3.Which place is suitable for a family with children?A.Colo-road Trips.B.TheBeartooth Highway.C.Seward Highway.D.The Lighthouse Trail.BAvi Loeb, a scientist, believes that we are not alone in the universe. The belief fits withLoeb's alien spaceship theory that at least one alien spaceship might be flying over the orbit of Jupiter, which won the international attention last year.Astronomers inHawaiifound the first known interstellar object in late 2017. It was a bit of light moving so fast past the sun that it could only have come from another star. Almost every astronomer on the planet was trying to figure out how the object, called “Oumuamua” got to our far-away part of the Milky way galaxy. “One possibility is that ‘Oumuamua’ is debris from an advanced technological equipment,” Loeb said. “Technology comes from another solar system just showed up at our door. ”“‘Oumuamua’ is not an alien spaceship,” Paul Sutter, another scientist wrote. He suggested Loeb was seeking publicity. Most scientists think “Oumuamua” is some sort of rock. They think it could be an icy wandering comet.Loeb says that “Oumuamua's” behavior means it can't be a block of rock shaped like a long photo. He thinks it's more likely an object that's very long and thin, perhaps like a long pancake or a ship's sail. Loeb says that if someone shows him evidence thatcontradictshis beliefs, he will immediately give in.Loeb believes himself a truth-teller and risk-taker in an age of very safe, too-quiet scientists. “The worst thing that can happen to me is that I would be relieved of my management duties, and that would give me even more time to focus on science,” Loeb says. He said he wouldn't mind giving up all the titles he had and returning to the Israeli farming village where he grew up.4. What does Loeb say about “Oumuamua”?A. It is an icy comet.B. It looks like a long photo.C. It is actually some sort of rock.D. It may come from another alien civilization.5. What does the underlined word “contradicts” in paragraph 4 probably mean?A.Goes against.B. Relies on.C. Turns to.D. Searches for.6. What do you think of Loeb?A. He is foolish.B. He is unsatisfied with his titles.C. He is a firm believer in scientific truth.D. He is uncertain about his career future.A. Have Aliens Paid a Visit in Spaceships?B. Do We Really Know about Space Theory?C. Scientists Are Working on High TechnologyD. Astronomers Are Encouraging Space TravelCThere will be more plastic than fish in the world’s oceans by 2050. That is what a new report from the World Economic Forum and Ellen MacArthur Foundation warns. If the current trend continues, the report said, oceans will contain one ton of plastic for every three tons of fish in 2025. By 2050, plastics will weigh more than fish. The problem is that each year at least 8 million tons of plastics end up in oceans around the world. This is the same as dumping the contents of one garbage truck into the ocean every minute.Not all plastic ends up in the ocean because someone throws a plastic bottle into the water. Plastic containers and other trash thrown onto streets and sidewalks often are swept into oceans. Unlike other types of trash in the ocean, the plastic never bio-degrades. There is a way to slow the amount of plastics going into the oceans — people can recycle more. Currently only about 14 percent of plastics are recycled. Research in Europe shows as much as 53 percent of plastic could be recycled using available technology. The report says that another solution is using less plastic for packaging products. But that is not likely to happen.“Given plastic packaging’s many benefits, both the possibility and desirability of an across-the-board dramatic reduction in the volume of plastic packaging used is clearly low, ”the report said. But the authors note reducing the use of plastics should be tried“where possible. ”For decades, scientists warned that plastics are killing fish. Research shows that fish are dying from choking after eating plastics. Another cause of death is that plastics cause“intestinal blockage and starvation, ”the environmental group said.8. Why is the garbage truck mentioned in Paragraph 1 ?A. To explain how plastics end up in the ocean.B. To warn people against the ocean pollution.C. To clarify the seriousness of the problem.D. To point out some details of the report.9. Why is plastic more dangerous than other types of trash?A. There is too much of it.B. It poisons the ocean water.C. It is from different sources.D. It is hard to break down.10. What is the author’s attitude to the suggested solutions?A. Pessimistic.B. Curious.C. Unconcerned.D. Terrified.A. People are not aware of the problem.B. Recycling is limited by lack of technology.C. Plastic packaging has become part of our life.D. Fish in the ocean will be replaced by plastics.DNina Wygant, 11, sits in front of a long table in a classroom that looks more like a trendy coffee shop than an elementary school classroom. Some of her fifth-grade classmates at Hopewell Memorial Junior High School sit on high-top chairs at counters. Others choose to sit in club chairs or soft bean bags in comfortable. "I like it because it gives us an environment we like or need to settle down and read a book that we would like to concentrate on instead of having desks and being all quiet," said Vivian Garcia, 10. “You can just space out and have your own little area. I find it very amazing that you can pick your own books instead of being told what to read.”That’s the end goal, said teacher Heather Shadish. Reading has always been a passion for this English language arts and science teacher, a passion she instills（灌输）in her pupils. Back then, in her literature class in graduate school at Chatham University, a professor read aloud the first chapter ofBecause of Winn-Dixieby Kate DiCamillo, a Newbery Medalist. "That was the moment I knew I wanted to some day teach reading. There was a spark there. I just felt these are the kind of books I need to share with kids ---the books that are going to make them feel something and make them fall in love with reading instead of reading being achore.”But information in children's workbooks is limited, so they open tablets and connect to Epic - a digital library that's free to educators and librarians, but $7.99 a month for parents — giving kids unlimited access to approximately 35,000 books（both print and audio）, quizzes and videos to enhance learning.“Epic gives students access to information not found in a textbook and presents it in a more interesting way," she said.12. What does Vivian think of the reading experience?A. She favors club chairs and free discussion.B. She feels comfortable to be told what to read.C. She enjoys the environment and reading choice.D. She finds it easy to pick a book in a crowded area.13. What does the underlined word “chore" in paragraph 2 mean?A. Task.B. Process.C. Habit.D. Skill.14. What can children get from Epic?A. Free audio books.B. Tasks on reading levels.C. Advice from educators.D. Useful learning resources.15. Which of the following is the best title of the passage?A. A Teacher's New Reading MethodB. Pupils' love of Reading RoomC. Options of Teaching ReadingD. Easy Access to Digital Reading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。

2021届贵阳一中新世界国际学校高三英语第一次联考试题及答案解析

2021届贵阳一中新世界国际学校高三英语第一次联考试题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AOvernight French ToastWhat You’ll Need•16-ounce loaf of French bread•5 eggs•1 1 /2 cups milk•1/2 cup half-and-half•1/3 cup maple syrup（枫糖浆）•1/2 teaspoon salt•foil（锡箔纸）•2 tablespoons melted butter（for topping）•2 tablespoons maple syrup（for topping）What to Do•With an adult’s help, cut the bread into 1-inch slices.•Place the eggs, milk, half-and-half, maple syrup, and salt into a large bowl. Stir（揽拌）the mixture until blended（混合均匀）.•Place the sliced bread into a baking dish. Pour the mixtureover the bread and press the slices into it. Cover the dish with foil and refrigerate overnight.•Remove the dish from the refrigerator at least one hour before baking. Ask an adult for help to preheat the oven to 375°F. Bake the French toast for 35 minutes or until golden brown.•For the topping, combine the melted butter and 2 tablespoons of maple syrup. Pour it over the French toast before serving.1.How much salt will you need to make a French toast?A.1/3 cup.B.1/2 teaspoon.C.2 tablespoons.D.16 ounces.2.How will you use foil?A.Place the sliced breadB.Cover the dish.C.Remove the dish.D.Eat the French toast.3.Who is the passage written for?A.Teachers.B.Parents.C.Cooks.D.Kids.BThe climate change is already eating into the output of the world's agricultural systems, with productivity much lower than it would have been if humans hadn't rapidly heated the planet, new research has found.Advances in technology, fertilizer (化肥)use and global trade have allowed food production to keep pace with an increasing global population since the 1960s. But rising temperatures in this time have acted as a handbrake (手刹) to farming productivity of crops, according to the new research, published in Nature Climate Change. Productivity has actuallyslumpedby 21% since 1961, compared to if the world hadn't been affected by global heating.With the global population set to rise to more than 9 billion by 205, the UN'S Food and Agriculture Organization has estimated that food production will have to increase by about 70%,with annual crop production increasing by almost 1 billion tons and meat production by more than200mtons a year by this point. Meanwhile, global temperatures are rising at a rate that scientists warn is extremely dangerous for human civilization.“The impact already is larger than I thought it would be,” said Ariel Ortiz-Bobea, an economist atCornellUniversitywho led the research. “It was a big surprise to me. The worry I have is that research and development in agriculture takes decades to translate into higher productivity. The projected temperature increase is so fast that I don't know if we are going to keep pace with that.”Weston Anderson, a researcher of food security (安全) and climate at Columbia University who didn't take part in the study, said the new research provides fresh insight into the importance of the impact upon agriculture.“The regions that this paper highlights as experiencing the largest reductions in agricultural productivity-CentralAmericaand theSahel- contain some of the least food secure countries in the world, which is a real concern,” he said.4. What does the underlined word “slumped” in paragraph 2 mean?A. Fallen.B. Gathered.C. Approached.D. Benefited.5. What is Ariel Ortiz-Bobea worried about?A. Fertilizer is used in food production.B. Population will rise to over 9 billion.C. Global temperatures are rising too fast.D. Agricultural research needs many years.6. What can we learn about Weston Anderson?A. He puts forward a different solution.B. He proposes carrying on with the research.C. He pays more attention to food insecure regions.D. He supports improving agricultural productivity.7. What is the best title for the text?A. The Impact of Growth in Farm ProductivityB. Productivity in Agriculture is GrowingC. Causes and Effects of Global HeatingD. Rapid Global Heating is Hurting Farm ProductivityCMikah Frye, a 9-year-old boy, was walking down the streets with his grandmother discussing Christmas gifts when he saw some homeless people struggling to stay warm in the cold night. Then he was thinking about a way to help the homeless to spend a warm Christmas.That thought stayed in Mikah Frye’s mind and when he reached home, Mikah informed his parents not to buy the Microsoft XBox gaming device he had asked for earlier. Mikah realized that by not buying the $300 device, he could instead donate over 30 blankets to the homeless. He knew how much it meant to be warm in the cold holiday season.Three years ago, Mikah and his parents were the ones living in a homeless shelter. Having suffered a financial crisis, they too had lost their house, not knowing where their next meal would come from and sharing a blanket every night. Mikah was six years old then but he remembered what it was like to have to give back that precious blanket every morning.Reaching out to the emergency shelter programme that looked after them 3 years ago, the family donated 60 blankets in the end, each with a personalized message of hope in Mikah’s handwriting stating: “They gave me a blanket, but I had to leave it. That’s why I want you to have your own blanket. Today, I live in my own house, and someday you will too. Your friend, Mikah.”The homeless people at the shelter may not have been able to give Mikah a Christmas gift in return but his gesture was noted by the billion dollar company Microsoft who made sure that Mikah was fooled into visitingtheir store so that Santa Claus could personally deliver an XBox from the company to him as a reward for making the top of “Santa’s list of nice boys” that year.8. Why did Mikah give up his Christmas gift?A. The device was out of date.B. His parents had a tight budget.C. He wanted to spend a warm Christmas.D. He decided to do something charitable.9. What made Mikah have a better understanding of the situation of the homeless?A. His own experience.B. His parents’ education.C. His visiting to the emergency shelter.D. The cold weather during the holiday season.10. What can be inferred from the last two paragraphs?A. The homeless gave Mikah a gift in return.B. He finally got the gift he wanted on Christmas.C. The company Microsoft fooled Mikah into buying an Xbox.D Mikah wrote a thank-you note to the emergency shelter he lived in.11. What might be the best title for the text?A. Mikah’s Precious Christmas GiftB. Mikah’s Giving Warmth on ChristmasC. Microsoft Rewarded Nice Boys on Santa’s ListD. The Homeless Needed Blankets on a Cold ChristmasDRain is vital to life on Earth. However, rain isn’t just made of water anymore—it’s partly made of plastic.Millions of tiny pieces of plastic, called microplastics, are wandering around Earth’s atmosphere and traveling across entire continents according to a study published in one journal on April 12.Microplastics are plastic particles less than 5 millimeters in diameter and come from a number of sources. Plastic bags and bottles released into the environment break down into smaller and smaller bits. Some microplastics are produced deliberately to provide abrasion(研磨)in products, such as toothpaste and cleansers. Another major source is your washing machine. When you wash clothing, tiny microfibers get washed away with the wastewater. Even though the water is treated by a wastewater plant, the microplastics remain,and they are released into the sea.Plastic rain may remind people of acid rain, but the former is far more widespread and harder to deal with. The tiny particles, too small to be seen with the naked eye, are collected by the wind from the ground. They are solight that they stay in the air to be blown around the globe. As they climb into the atmosphere, they are thought to act as nuclei (核心) around which water vapor (水蒸气) combines to form clouds. Some of the dust falls back to land in dry conditions, while the rest comes down as rain.Microplastics have been found everywhere you can imagine. From fish and frogs to mice and mosquitoes, their bodies have been found on average to contain 40 pieces of microplastic. As the top of the food chain, humans are exposed to microplastics, too. “We live on a ball inside a bubble,” microplastic researcher Steve Allen said. “There are no borders, there are no edges. It rains on the land and then gets blown back up into the air again to move somewhere else. There’s no stopping it once it’s out.”12. What do we know about microplastics?A. They have a diameter of over 5 millimeters.B. They have become a threat to humans.C. They are light and can be easily dealt with.D. They cause acid rain and plastic rain.13. What does Paragraph 3 mainly talk about?A. Waysto deal with microplastics.B. The wide use of microplastics.C. Where microplastics come from.D. How microplastics pollute water.14. What does Steve Allen want to tell us in the last paragraph?A. No place can be safe from microplastic pollution.B. The atmosphere possesses the ability to self-cleanse.C. Countries should work together to fight pollution.D. Wind causes microplastics to move somewhere else.15. The main purpose of the article is to________.A. call on people to use fewer plastic productsB. warn people of the danger of microplasticsC. introduce the sources and effects of microplasticsD. make a comparison between acid rain and plastic rain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。

贵州省贵阳市贵阳一中新世界国际学校2020-2021学年度九年级上学期第一次月考化学试题

贵州省贵阳市贵阳一中新世界国际学校【最新】度九年级上学期第一次月考化学试题学校:___________姓名：___________班级：___________考号：___________一、单选题1．新世界人爱新世界，下列说法正确的是（）A．边走边吃，随意乱丢包装袋B．未及时冲厕C．志愿爱护环境D．随意践踏草坪、破坏公物2．中华民族有着光辉灿烂的发明史，下列发明创造不涉及化学反应的是A．火药的使用B．用铁矿石冶铁C．烧结黏土制陶瓷D．打磨磁石制指南针3．规范的操作是实验成功的保证。

下列实验操作正确的是（）A．O2的验满B．收集O2C．滴加液体D．检查气密性4．关于催化剂的说法正确的是（）A．化学反应后催化剂本身的质量减少B．反应前后催化剂的化学性质通常会发生改变C．催化剂可加快或减慢化学反应D．用氯酸钾制取氧气时，加入催化剂可使生成氧气的质量增加5．元素铅的质子数为82，相对原子质量为207，求该元素原子核内中子数与核外电子数之差（）A．42 B．43 C．82 D．836．下列对分子、原子、离子的认识，不正确的是（）A．分子、原子、离子都能构成物质B．气体压缩为液体，分子体积和质量变小C．温度越高，分子运动越快D．钠原子和钠离子的化学性质不同7．下列关于四种粒子的结构示意图的说法中正确的是（）A．共有四种元素B．①属于阳离子④属于阴离子C．①③的化学性质相似D．①④已达到相对稳定结构8．我国已于2007年发射绕月飞行的探测卫星——“嫦娥一号”。

人类探月的重要目的之一是勘察、获取地球上蕴藏量很小而月球上却极为丰富的核聚变燃料——“He-3”，解决地球能源危机。

已知“C-13”是指原子核内有6个质子、7个中子的碳原子，则“He-3”所指的氦原子核内含有A．3个质子，没有中子B．2个质子，1个中子C．1个质子，2个中子D．3个中子，没有质子9．某公司发生火灾引发液氨泄露并发生化学爆炸，造成重大伤亡。