9年级试题卷A
【期末测试AB卷】人教英语九年级上册-A基础测试试题试卷含答案
【期末测试AB卷】人教版9年级上册英语·A基础测试一、单项选择(15小题,每小题1分,共15分)1.—It’s cold outside, Tina. Wear your coat, ________ you’ll catch a cold.—OK, mom.A.but B.because C.and D.or 2.—She is not interested in cooking.—________ I.A.So am B.Nor do C.Neither am D.Neither do 3.—Could you tell me how to pay for the food by QR code(二维码)on the phone?—________.A.You are welcome B.Take it easy C.With pleasure 4.—What would you like to have for lunch, Millie?—Either noodles or rice________ OK.A.is B.are C.were D.was 5.The population of our city ________ about 30 million.A.am B.is C.are D.be 6.—Could you tell me ________?—Next Friday morning.A.when will we have the school leavers’ partyB.When we will have the school leavers’ partyC.who will host the school leavers’ party7.— David, look at the man in white over there. Can you tell me________ ?— I suppose he is a doctor.A.who he is B.what is he C.what he is8.He asked whether June is _______ good time to visit Chongqing.A.a B.an C.the D./9.—I wonder _______ when I meet someone for the first time.—You are supposed to shake hands here.A.why am I supposed to shake hands B.what am I supposed to doC.why I am supposed to shake hands D.what I am supposed to do10.This poem is written by Li Hong and I want to write________by myself.A.one B.it C.much D.a little11.The two friends were so pleased to see each other that they forgot __________.A.anything else B.else something C.else nothing D.everything else 12.Waste water from factories must before pouring into rivers or lakes.A.process B.be processed C.be processing D.have processed13.— Which dress do you like best, Madam?—Sorry, I can't decide _______ now.A.to buy which one B.buy which one C.which one to buy D.which I should buy it 14.My arm is still painful, I'm going to see a doctor.A.so B.for C.but D.or15.The clerk warned us ____ quiet in the library.A.to keep B.not to keep C.keeping二、完形填空(10小题,每小题1分,共10分)Red is the color of China. Among all the ____16____, red is most easily seen. The color red is fresh and pure, ____17____ in China we call it China Red. Chinese people are attracted by the color red not only because it makes people excited, but also because it has ____18____ meaning in Chinese culture and history.No country in the world has ever ____19____ a color in such a way as China. Here, red is a symbol. It gives color to the soul(灵魂)of the nation. In the past, red represented dignity(尊严)and mystery. Even now, Chinese people ____20____ the color much more than the rest of the world do. It can be said that China Red is an everlasting theme for China, and an ____21____ color for the Chinese people. China Red has ____22____ a very popular word, attracting the world's attention.Finding red-colored things in China is very ____23____, as you can see the color everywhere. All traditional red things have played special ____24____ in China: the walls of ancient palaces, the____25____ flag, Chinese knots, lanterns, traditional paper-cuts, and even tanghulu.Red is the color of ____26____, health, harmony, happiness, peace, wealth and so on. Only real things and events can fully ____27____ red's real beauty. The color can be alive and meaningful only when it'sconnected with people.In China, red is ____28____ than just a color. It carries the ancient history and ____29____ of the Chinese nation. China Red is ____30____ with mysterious charm beyond description and it is right here in China waiting for you to feel and discover!16.A.colors B.news C.papers D.paints17.A.but B.or C.and D.while18.A.poor B.rich C.simple D.correct19.A.used B.shared C.drawn D.affected20.A.need B.dislike C.hate D.love 21.A.interesting B.expensive C.easy-going D.important 22.A.spoken B.said C.become D.got23.A.hard B.easy C.sudden D.warm24.A.roles B.games C.cards D.places25.A.national B.international C.local D.foreign 26.A.rainbow B.fear C.worry D.luck27.A.believe B.show C.talk D.write28.A.large B.less C.more D.higher29.A.art B.culture C.business D.ability30.A.pleased B.crowded C.filled D.satisfied三、阅读单选(15小题,每小题2分,共30分)An amazing theme park: Happy ValleyPlace Gift shop and snack barIn Overseas Chinese Town, Shenzhen City, Guangdong Province ●Lots of books, T-shirts and toys.●You will love our ice-cream and fresh fruit juice.Tickets How to get there●All-day ticket of Happy Valley: ¥180/person.●By tourist bus No.1 (running between Luohu Railway Station and Happy Valley).●Night ticket of Happy Valley: ¥60/person.Time: between 18:30 and 22:00.●Ticket of Happy Train: ¥40/person.●Tickets of Happy Valley + HappyTrain:¥200/ person.●Tickets are free to the people over 70 and under 3.●By bus No, 20, 21, 26, 27,then get off at Window of the World Station and walk for about 3 minutes to Happy Valley.●By subway Line 1(running between 6:30 and 23:30), get off at the stop of Window of the World Station and leave from Exit A, then walk for about 3 minutes to Happy Valley.Groups●School groups are welcome on Tuesdays and Wednesdays.●The theme park is also available to rent (租用) for birthday parties.●You can call 8632578 to book group tickets.阅读上面的信息,选择正确答案。
第七届“学用杯”全国知识应用竞赛九年级数学初赛试题(A) 人教新课标版
第七届“学用杯”全国数学知识应用竞赛九年级初赛试题(A)卷(本卷满分150分,考试时间120分钟)温馨提示:亲爱的同学们,这份试卷将记录你的自信、沉着与智慧.愿你能够放松心情,认真审题,缜密思考,细心演算,交一份满意的答卷.一、选择题(每小题6分,共30分)1.校园内一个半径为10米的圆形草坪,如图1,一部分学生为走“捷径”,走出了一条小路AB.通过计算可知,这些学生踩坏了花草,其实仅仅少走了(假设2步为1米,结果保留整数)()A.4步B.5步C.6步D.7步2.小红的妈妈做了一个矩形枕套(长、宽不等),又在枕套四周镶上了相同宽度的花边,如图2所示,关于两个矩形,下列说法正确的是()A.两个矩形相似B.两个矩形不一定相似C.两个矩形一定不相似D.无法判断两个矩形是否相似3.如图3,方台村为了抽取水库的水来浇灌山上的果木树,准备在山坡上建一个抽水泵站.已知山坡上有A、P、Q三处可供选择,且测得A到水库C的距离为50m,P到C的距离为40m,Q到C的距离为35m,山坡的坡角∠ACB=15°.由于大气压的影响,此种水泵的实际吸水扬程AB不能超过10m,否则无法抽取水库的水,则水泵站应建在(sin15°=0.258 8,cos15°=0.965 9,tan15°=0.267 9)()A.A处B.P处C.Q处D.A、P、Q均可4.宏光学校有一面积为100米2的正方形展厅,计划铺满统一大小的正方形地板砖,现市场上有大、小两种规格产品:大地板砖对角线长为50cm,每块0.8元;小地板砖对角线长为40cm,每块0.6元,甲公司的优惠办法是:凡购买大地板砖700块以上者给予9折优惠,凡购买小地板砖1 000块以上者给予7折优惠;乙公司的优惠办法是:凡购买700元以上者,不管购买大块还是小块均按8折优惠.在质量、服务条件相同的情况下,为使学校支付的费用最少,请你为该校选择最佳购买方案()A.到甲公司购买大块地板砖B.到乙公司购买大块地板砖C.到甲公司购买小块地板砖D.到乙公司购买小块地板砖5.如图4,在某条公路上,从里程数8m开始到4 000m止,每隔8m将树与灯按图中的规则设立:在里程数8m处种一棵树,在16m处立一盏灯,在24m处种一棵树(相邻的树与树、树与灯之间的距离都是8米)……,且每两盏灯之间的距离相等.依此规则,下列里程数800m~824m之间树与灯的排列顺序中正确的是()二、填空题(每小题6分,共30分)6.王强毕业于农业技术职业学校,毕业后采用大棚栽培技术种植了一亩地的良种西瓜,第一年这亩地产西瓜625个,为了估计这亩地的收成,王强在西瓜大批上市前随机摘下10个成熟的西瓜,称重如下:西瓜质量(单位:千克)西瓜个数(单位:个) 1 2 3 2 1 1根据以上信息可以估计这亩地的西瓜质量约是千克.7.你是否用电脑进行过图案设计?图5(1)是小明在电脑上设计的小房子,然后他又进行变化,得到图5(2);小亮也在电脑上设计了一个图案,如图5(3),如果小亮也按小明变化图形时的规律对图5(3)进行变化,得到的图案是(画出简图).8.某希望小学刚刚建起,田径场还没建好,秋季运动会时,临时设置简易跑道如图6所示,两端由两个半圆组成,一周约250米,在一次400米跑比赛中,第一道从起点A要跑一圈半到终点C.第二道终点不变,且中途不准抢道(每道宽1米).为公平起见,第二跑道起点B应比第一跑道向前移动.9.自行车轮胎安装在前轮上行驶6 000千米后报废,若安装在后轮上只能行驶4 000千米.为了行驶尽可能远的路程,如果采用当自行车行驶一定路程后将前、后轮胎调换使用的方法,那么安装在自行车上的一对新轮胎最多可行驶千米.10.已知,如图7,斜坡PQ坡度为41:3i ,坡脚Q旁的点N处有一棵大树MN.近中午的某个时刻,太阳光线正好与斜坡PQ垂直,光线将树顶M的影子照射在斜坡PQ上的点A处.如果AQ=4米,NQ=1米,则大树MN的高度为.三、解答题(本大题共60分)11.(本题10分)判断决策:三个无线电厂家在广告中都声称,它们的半导体收音机产品在正常情况下,产品的平均寿命是8年,商品检验部门为了检查他们宣传的真实性,对三个厂家出售的半导体收音机寿命进行了抽样统计,结果如下(单位:年):甲厂:3、4、5、5、5、7、9、10、12、13、15;乙厂:3、3、4、5、5、6、8、8、8、10、11;丙厂:3、3、4、4、4、8、9、10、11、12、13;请你利用所学统计知识,对上述数据进行分析并回答以下问题:(1)这三个厂家的广告,分别利用了哪一种反映数据集中趋势的特征数?(2)如果你是顾客,应选购哪个厂家的产品?为什么?12.(本题15分)方案设计:东风汽车租赁公司共有30辆出租汽车,其中甲型汽车20辆,乙型汽车10辆.现将这30辆汽车租赁给A、B两地的旅游公司,其中20辆派往A地,10辆派往B地,两地旅游公司与汽车租赁公司商定每天价格如下表:(1)设派往A地的乙型汽车x辆,租赁公司这30辆汽车一天共获得的租金为y(元),求y与x之间的函数解析式,并写出自变量x的取值X围;(2)若要使租赁公司这30辆汽车一天所获得的租金总额不低于26 800元,请你说明有多少种分派方案,并将各种方案设计出来;(3)如果要使这30辆汽车每天获得的租金最多,请你为租赁公司提出合理的分派方案.13.(本题15分)实践应用:下承式混凝土连续拱圈梁组合桥,其桥面上有三对抛物线形拱圈.图8(1)是其中一个拱圈的实物照片,据有关资料记载此拱圈高AB为(含拱圈厚度和拉杆长度),横向分跨CD为.(1)试在示意图(图8(2))中建立适当的直角坐标系,求出拱圈外沿抛物线的解析式;(2)在桥面M(BC的中点)处装有一盏路灯(P点),为了保障安全,规定路灯距拱圈的距离PN不得少于1.1m,试求路灯支柱PM的最低高度.(结果精确到0.1m)14.(本题20分)归纳猜想:同学们,让我们一起进行一次研究性学习:(1)如图9,已知正三角形ABC的中心为O,半径为R,将其沿直线l向右翻滚,当正三角形翻滚一周时,其中心O经过的路程是多少?(2)如图10,将半径为R的正方形沿直线l向右翻滚,当正方形翻滚一周时,其中心O经过的路程是多少?(3)猜想:把正多边形翻滚一周,其中心O所经过的路程是多少(R为正多边形的半径,可参看图11)?请说明理由.(4)进一步猜想:任何多边形都有一个外接圆,若将任意圆内接多边形翻滚一周时,其外心所经过的路程是否是一个定值(R为多边形外接圆的半径)?为什么?请以任意三角形为例说明(如图12).通过以上猜想你可得到什么样的结论?请写出来.四、开放题(本题30分)15.杨子晚报报道《你家用“峰谷电”合不合算?》:“峰谷电”的含义是这样的,每天8∶00到22∶00用电每千瓦时是0.56元(峰电);22∶00至次日8∶00每千瓦时是0.28元(谷电).注:平时居民用电每千瓦时是0.52元.(1)根据你家的平时用电情况,算一算,你家用这样的“峰谷电”合算吗?(2)请根据“峰谷电”的使用,编拟一道数学实际应用问题,并给出解题过程,注明用的什么数学知识.第七届“学用杯”全国数学知识应用竞赛九年级初赛试题(A)卷参考答案一、选择题(每小题5分,共30分)1.B 2.C 3.C 4.C 5.D二、填空题(每小题5分,共30分)6.3 1257.8.2π米9.4 80010.8米三、解答题(每小题15分,共60分)11.解:(1)因为甲厂的收音机寿命的平均数是8年,众数是5年,中位数是7年;乙厂的收音机寿命的平均数约是6.45年,众数是8年,中位数是6年;丙厂的收音机寿命的平均数约是7.36年,众数是4年,中位数是8年. ················ 6分 所以,甲厂选用平均数,乙厂选用众数,丙厂选用中位数; ··········· 8分(2)因为甲厂收音机的平均寿命比乙厂、丙厂的都高,因此,顾客应选购甲厂的产品.··········· 10分12.解:(1) 1 000(20)900800600(10)26 000100(010)y x x x x x x =-+++-=+≤≤;·········· 6分(2)依题意,得26 00010026 800x +≥,又因为010x ≤≤,∴810x ≤≤.因为x 是整数,∴x =8,9,10,方案有3种. ················ 9分 方案1:A 地派甲型车12辆,乙型车8辆;B 地派甲型车8辆,乙型车2辆;方案2:A 地派甲型车11辆,乙型车9辆;B 地派甲型车9辆,乙型车1辆;方案3:A 地派甲型车10辆,乙型车10辆;B 地派甲型车10辆. ········ 12分(3)∵26 000100y x =+是一次函数,且1000k =>,∴y 随x 的增大而增大. ∴当10x =时,这30辆车每天获得的租金最多.∴合理的分配方案是A 地派甲型车10辆,乙型车10辆;B 地派甲型车10辆. ··· 15分13.(1)如右图,以A 为坐标原点,BA 所在直线为y 轴建立直角坐标系xAy ,因拱圈外沿所在的抛物线过原点,且以y 轴为对称轴,故可设抛物线解析式为:2y ax =, ··············· 4分由题意抛物线过点(2010)D -,,代入得140a =-,故拱圈外沿抛物线的解析式为: 2140y x =-. ······························· 8分 (2)设(10)N k -,,则:21(10) 2.5(m)40k =-⨯-=-,∴107.5(m)MN k =+=, ························· 12分 ∴7.5 1.18.6PM MN PN =++=≥(m ),即路灯支柱PM 的最低高度为.(其余解法可类似给分). ············ 15分14.解:(1)当正三角形ABC 向右翻滚一周时,其中心O 经过的路线是三条等弧,所以其中心O 经过的路程为:120π32π180R R ⨯=. ·················· 3分 (2)中心O 经过的路程为90π42π180R R ⨯=. ················· 6分 (3)当n 边形向右翻滚一周时,其中心O 经过的路线是n 条等弧,这些弧的半径为R ,所对的圆心角为360n ,所以中心O 经过的路程为360π2π180R n n R ⨯=. ······· 10分 (4)是定值2πR ,理由如下:在△ABC 中,设A B C αβγ∠=∠=∠=,,,△ABC 的外接圆⊙O 的半径为R ,把△ABC 沿直线l 向右翻滚一周时,其外心O 经过的路线是三条弧,当AC 边与直线l 重合时,C 与C '重合,A 与A '重合,B 与B '重合,连接CO 、C O '',则ACO A C O '''∠=∠,所以180OCO ACA γ''∠=∠=-,所以(180)π180R l γ-=,同理,另两条弧长分别为:(180)π180R α-,(180)π180R β-,所以外心O 所经过的路程为2πR . ········ 16分 通过以上猜想可得结论为:把圆内接多边形翻滚一周时,多边形的外心所经过的路程是一个定值. ······························· 20分四、开放题(本题30分)15.(1)答案不惟一,可选择自己家每月(或平均每天)的用电情况,计算说明.只要合理即可得分.(本小问10分);(2)答案不惟一,本小问共20分,编写题目合理可得10分,再写出解题过程,并说明所用数学知识可得20分,以下题目可参考.题1:(用一元一次方程知识编拟)某户居民今年二月份起使用“峰谷电”,三月份经记录这两个月使用“谷电”150千瓦时,已知两月共付电费112元.问该居民使用“峰谷电”多少千瓦时?费用比原来节约了多少?(“峰谷电”中,“峰电”是8∶00到22∶00用电,“谷电”是22∶00到次日8∶00,下同)题2:(用二元一次方程知识编拟)某户居民今年三月份使用“峰谷电”,付电费112元,比原来节约了60.8元,问该户居民使用“峰电”,“谷电”各多少千瓦时?题3:(用不等式知识编拟)某户居民今年三月份使用电量300千瓦时,当“峰电”占总电量的多少时,使用“峰谷电”才合算?题4:(用函数知识编拟)某户居民今年三月份起使用“峰谷电”,平均每天使用“峰电”8千瓦时,写出三月份(31天)该户居民的电费(y元)与每天“谷电”的用电量x(千瓦时)之间的函数关系式.。
河南省2020年九年级上学期期末语文试题A卷
河南省2020年九年级上学期期末语文试题A卷姓名:________ 班级:________ 成绩:________一、选择题1 . 下列各句中有语病的一项是()A.为了解决池塘养殖水体污染大、湖泊拆围后渔业总量不足的矛盾,省农业农村厅与省农科院共同组建了池塘绿色生态养殖技术创新团队。
B.去年6月,中央宣传部、文化和旅游部、国家税务总局、国家广播电视总局、国家电影局等联合印发《通知》,要求加强对影视行业天价片酬、“阴阳合同”、偷逃税等问题。
C.通过军事体育这一特殊舞台,代表中国向世界展示社会主义新时代的精神气貌,对武汉而言机会难得。
D.武汉地铁运营公司最新数据显示,2月22日,武汉轨道交通线网客运量380.43万人次,创单日客运量新高。
2 . 下列句子中加点的词语使用不恰当的一项是:A.不久前,中央电视台举办了第十二届全国青年歌手电视大奖赛,选手们的表现成为许多观众茶余饭后津津乐道的话题。
B.2006年6月9日,令广大球迷梦寐以求的世界杯足球赛在德国拉开帷幕,历时一个月的64场精彩比赛将使球迷们大饱眼福。
C.大学生洪战辉带着妹妹上大学的事迹令人感动,他被评为2005年“感动中国”十大人物,真是可歌可泣。
D.当记者来访震惊全国的齐齐哈尔第二制药厂假药案的几位药检人员时,令人不可思议的是,他们居然都是非药学专业并从未接受过专业上岗培训的。
二、基础知识综合3 . 阅读下面的文字,完成各题。
在语文课上,我们被《秋天的怀念》中的至爱亲情打动。
(风丰)华正茂的史铁生因病瘫痪后,经常焦(燥躁)暴怒。
面色憔悴的母亲为了使他走出绝望,小心翼翼地守护着他;几次三番地央求他去北海看花。
不曾想,看花还未成行,已经病入膏肓的母亲便撒手人寰,与他永远诀别……又一个秋天,作者看着开得正烂漫的菊花,回忆着母亲去世前的经(历厉),满腔悔恨和愧疚,悟出了生命的真(谛缔):无论我们遭遇怎样的厄运,我们都要坚强,要乐观,要找到一条通往幸福的道路。
中考数学复习 专题34 与圆的有关计算试题(A卷,含解析)-人教版初中九年级全册数学试题
与圆的有关计算一、选择题1. (某某东营,7,3分)如图,已知一块圆心角为270°的扇形铁皮,用它做一个圆锥形的烟囱帽(接缝忽略不计),圆锥底面圆的直径是60cm ,则这块扇形铁皮的半径是( ) A .40cm B .50cm C .60cm D .80cm【答案】A【逐步提示】本题考查弧长公式与圆锥侧面展开图,先计算圆锥的底面周长,再根据圆锥的底面周长等于扇形的弧长列出方程求解.【详细解答】解:圆锥的底面周长为:π×60=60πcm,所以扇形的弧长为60πcm.根据扇形的弧长公式可得27060180rππ=,解得r=40cm .故选A . 【解后反思】解答本题易出现两处错误:一是公式错误,如把弧长公式与扇形面积公式搞错搞混;二是把直径误以为半径.圆锥的侧面展开图为扇形,扇形的半径等于圆锥的母线长,扇形的弧长等于圆锥底面圆的周长,扇形的面积等于圆锥的侧面积. 【关键词】弧长公式;圆锥的侧面展开图2. (某某东营,17,4分)如图,某数学兴趣小组将边长为5的正方形铁丝框ABCD 变形为以A 为圆心,AB 为半径的扇形(忽略铁丝的粗细),则所得的扇形ABD 的面积为__________.【答案】25【逐步提示】本题考查弧长公式及扇形面积公式,【详细解答】解:∵正方形的边长为5,∴弧BD 的弧长=10,∴S 扇形ABD =111052522lr =⨯⨯=.故答案为25.【解后反思】解答本题需掌握:(1)弧长公式:l=180n r π;扇形面积公式:S 扇形=2360n r π=12lr .【关键词】弧长公式;扇形面积公式 3.4. .(某某某某,10,3分)如图,AB 是⊙O 的切线,B 为切点,AC 经过点O ,与⊙∠ACB=30°,AB=3,则阴影部分的面积是( )(A )32 (B )6π(C )32-6π (D )33-6π 【答案】C【逐步提示】本题考查切线的性质及扇形面积公式的应用,连接OB ,先由切线的性质求出圆心角∠AOB 的度数,再分别计算△AOB 和扇形BOD 的面积,相减可得阴影部分面积.【详细解答】解:连接OB ,∵AB 是⊙O 的切线,B 为切点,∴∠ABO=90°.∵∠ACB=30°,∴∠AOB=60°.在Rt△AOB 中,OB=tan AB AOB ∠=1.∴S 阴影=S △AOB -S 扇形BOD =12·AB ·OB -2601360π⨯⨯=32-6π.故选择C .【解后反思】计算阴影部分的面积,通常情况下运用转化的思想,将不规则的图形、零散的几个图形面积转化为规则图形之间的和差关系和相对集中形成的规则图形面积. 【关键词】切线的性质;扇形面积公式5. ( 某某某某,7,3分)如图,一扇形纸扇完全打开后,外侧两竹条和AC 的 夹角为120°,AB 长为25cm ,贴纸部分的宽BD 为15cm ,若纸扇两面贴纸,则贴纸的面 积为().A . 175πcm 2B . 350πcm 2C .πcm 2D . 150πcm 2【答案】B【逐步提示】先由AB 和BD 的长求出AD 的长,再分别求出扇形BAC 和扇形DAE 的面积,然后根据“贴纸部分的面积等于扇形BAC 的面积减去扇形DAE 的面积”求解.【详细解答】解:∵AB =25cm ,BD =15cm ,∴AD =25-15=10cm ,∴S扇形BAC =2120251250=1803ππ⨯(cm 2),S 扇形DAE =212010200=1803ππ⨯(cm 2),∴贴纸部分的面积=125020035033πππ-=(cm 2),故选择B .【解后反思】1.弧长公式:l =nπr 180 ,扇形面积公式:S =360n 2r π=12lr ,其中n 为扇形圆心角的度数,r 为扇形半径.2.扇环的面积等于两个扇形面积之差. 【关键词】 扇形的面积计算6.( 某某某某,5,3分)如图,是一圆锥的左视图,根据图中所标数据,圆锥侧面展开图的扇形圆心角的大小为( )A .90°B .120°C .135°D .150°【答案】B【逐步提示】本题考查了三视图及圆锥侧面展开图的圆心角的计算,解决问题的关键是把图中的数据与圆锥结合起来.圆锥的主视图和左视图是一样的,数字“6”是底面直径,数字“2出圆锥的母线.然后利用扇形的弧长等于圆锥的底面周长即2180n Rl r ππ==,可以求得圆心角的度数. 626 第5题图【详细解答】解:圆锥的母线长=()226239+=,∵2180nR l r ππ==∴×923180n ππ⨯=,解得n =120°,故选择B . 【解后反思】了解圆锥的侧面展开图是扇形,扇形的弧长等于圆锥的底面周长,扇形的半径等于圆锥的母线.弄清楚这些关系才能正确解决问题.另外,左视图看到的两个量要清楚分别代表什么,不要把底面直径和周长混淆,导致解题错误.另外,对于涉及到圆锥的底面圆半径r 、母线长l 与圆锥侧面展开图的圆心角n 三个量之间的关系时,公式360r nl =的合理应用来得快捷得很,其推导过程如下:如图,由扇形ABC 的面积的两种表达形式可知,2123602n l l r ππ=⋅⋅,整理后即得360r nl =. 【关键词】左视图;圆锥的侧面展开图.7. (某某威海,16,3)如图,正方形ABCD 内接于⊙O ,其边长为4,则⊙O 的内接正三角形EFG 的边长为____________.O GFED C B A 第16题图【答案】6【逐步提示】先求得⊙O 的半径,再求得内接正三角形EFG 的边长。
2022逐梦芳华吉林省版九年级第六次考试A卷
逐梦芳华―阶段性学业水平测评卷(吉林省版九年级第六次考试A卷)道德与法治・历史试题一、选择题(下列各题的四个选项中,只有一项是最符合题意的。
每小题2分,共26分)1.“见贤思齐焉,见不贤而内自省也。
”这体现出认识自己的途径是A.他人评价B.与他人比较 -c.自我观察和分析D.从生理和心理方面认识自己2.老师是我们学习的指导者和成长的引路人。
我们与老师建立良好关系的开始是A.彼此尊重B勤学好问C.携手共进D.求同存异3.疫情期间,中学生小吉因与父母发生矛盾而情绪低落。
他拨打了青少年心理援助热线,向咨询师倾诉后,心情好转。
小吉调控情绪的方法属于A.合理宣泄B.放松训练C.转移注意D.改变认知评价4.古语说:“千人同心,则得千人之力;万人异心,则无一人之用。
”由此可见,集体的力量来源于成员A.获得的安全感和自信心B人际交往的态度和能力C.共同的目标和团结协作D.捍卫自己的尊严与利益5.卢冬获得残奥会女子50米蝶泳金牌,在领奖台上,由于其他两位获奖者坐在轮椅上,卢冬单腿下蹲与她们合影,三位运动员留下了本届残奥会上最关照片之一。
蹲下,给对方一个高度,也展现了自己精神的高度,心灵的温度。
卢冬展现出的“高度”和“温度”是①尊重他人②行己有耻③平等待人④诚实守信A.①②B.②④C.①③D.③④6.某学院一名在读学生发现危害国家安全的可疑情况,立即拨打12339国家安全机关举报受理电话。
该市国家安全局成功制止、惩处了这一危害国家安全的事件。
为了维护国家安全,中学生应该①学习和掌握维护国家安全的知识②坚决制裁一切损害国家安全的行为③为维护国家安全贡献智慧和力量④树立国家安全利益高于一切的观念A.①②③B.①②④C.①③④D.②③④7.我国宪法是党的主张和人民意志的统一。
我国宪法的核心价值追求是A.完善以宪法为核心的社会主义法律体系B.维护宪法的最高权威,保障宪法的实施C.保障公民在民事活动中的权利义务相同D规范国家权力运行以保障公民权利的实现8.当事人在自愿、互谅的基础上,依据法律,直接对话,分清责任,达成协议,解决纠纷。
2021-2022学年河南省洛阳市龙门第一实验学校九年级(上)期末物理(A卷)试题及答案解析
2021-2022学年河南省洛阳市龙门第一实验学校九年级(上)期末物理试卷(A卷)一、单选题(本大题共6小题,共12.0分)1.下列说法正确的是( )A. 温度为0℃的物体没有内能B. 现代火箭用液态氢作燃料,是因为它具有较大的热值C. 开关与被控制的灯泡应并联连接D. 直流电动机原理是电流的磁效应2.两台汽油机,甲的效率为35%,乙的效率为25%,这两个数据表示( )A. 甲机做的功比乙机的多B. 甲机的功率比乙机的大C. 在相同时间内甲机燃烧的汽油较乙机多D. 在消耗相同的汽油时,甲机做的有用功比乙机多3.关于电流表和电压表,下列说法错误的是( )A. 两电表都是根据通电导体在磁场中受到力的作用工作的B. 使用前都应检查指针是否指零C. 两电表都有两个量程,一般都先用大量程“试触”D. 若将电压表串联在电路中,而电流表并联在电路中时,两电表都没示数(两电表都完好)4.如图所示,当闭合开关后,三个电阻是并联关系的是( )A. B.C. D.5.小灯泡的I−U图像如图甲所示,将它与定值电阻R并联,如图乙所示,闭合开关S1,电流表的示数为0.2A;再闭合开关S2,电流表的示数增加了0.25A。
则( )A. 电源电压为2.5VB. 灯泡的阻值为10ΩC. 定值电阻的阻值为8ΩD. S1、S2都闭合时电流表示数为0.45A6.在如图所示的实验装置中,接通电源后,导体AB受力的作用发生运动,然后改变电流方向或磁感线方向,则下列叙述中错误的是( )A. 在上述实验现象中,是机械能转化为电能B. 通电导体在磁场中受力方向跟电流方向有关C. 通电导体在磁场中受力的方向跟磁感线方向有关D. 同时改变电流方向和磁感线方向,通电导体的受力方向不变二、多选题(本大题共2小题,共4.0分)7.现在很多大型商场都安装了如图甲所示的“聪明的电梯”,没人和有人时电梯运行的速度会发生变化。
这种电梯的简易控制电路如图乙所示,R是一个压敏电阻,其阻值随压力的增大而减小。
2023-2024学年浙江省绍兴市柯桥区联盟九年级上学期期末语文试题A卷
2023-2024学年浙江省绍兴市柯桥区联盟九年级上学期期末语文试题A卷班级开展以“风度”为主题的学习活动,小文同学邀请你一起来丰富“风度“主题展板的内容,请你完成下面的探究。
1(1)娉.婷( )A. pīng B. pìn(2)茅塞.顿开( )A. sāi B. sè2.根据拼音写汉字。
(1)chù( )立(2)广mào( )3.填入“展板六”横线处的成语,恰当的一项是()A.理至易明B.富丽堂皇C.间不容发D.相得益彰4.请根据你的积累,在展板的第①—⑩处补全内容。
5. 下列关于文化文学常识的表述,不正确的一项是()A.《湖心亭看雪》选自明末清初文学家张岱的《陶庵梦忆》,他在文中用清新淡雅的笔墨描绘了西湖雪后奇景。
B.《月夜忆舍弟》中舍弟是杜甫的弟弟,当时正值安史之乱,兄弟离散。
C.印度文学巨匠泰戈尔在诗歌艺术方面取得了非凡的成就,母爱和童真是他诗歌的重要主题,如《飞鸟集》就用孩童的视角,描绘儿童的天真情态和奇思妙想。
D.古代官吏因罪降职或调到边远地方做官,叫“谪”或“左迁”,如“滕子京谪守巴陵郡”“三年谪宦此栖迟”中的“谪”,《左迁至蓝关示侄孙湘》中的“左迁”。
6. 根据要求,补充完成下列思维导图。
便宜的圣诞树[英国]劳克·吉尼①圣诞节又来到了,十岁的埃里克已经可以帮父亲把圣诞树搬运到市场出售了。
看,埃里克干得多起劲呀!父亲决定,那棵最好、最漂亮的圣诞树由埃里克负责卖,而且卖的钱都归他。
②埃里克小心翼翼地把圣诞树摆在摊位前,这棵树的确十分漂亮,埃里克不禁吹了声低长的口哨。
“卖到三十美元,或者四十美元,肯定没问题!”他想着。
③突然,父亲的声音传了过来:“给老年人活动中心捐圣诞树吗……”父亲正和一个矮个子男人说话,那是布朗牧师。
④“我非常愿意帮助你,但这些都是最好的圣诞树,它们很值钱。
对不起了!”⑤埃里克看到布朗牧师的表情瞬间由高兴转为了失落。
贵州省铜仁五中2022-2023学年九年级上学期期中物理试题(A卷)(word版)
贵州省铜仁五中2022-2023学年九年级上学期期中物理试题(A卷)(word版)一、单选题(★★) 1. 如图所示,“天宫课堂”上王亚平老师将两块透明板上的水球接触后粘在一起,慢慢拉开板后形成一个长长的“液桥”,该现象主要说明了()A.水分子间有空隙B.水分子间存在吸引力C.水分子间存在排斥力D.水分子处在永不停息的无规则运动中(★★★) 2. 下列关于内能知识的描述正确的是()A.物体温度越高内能越大,所以0℃的冰没有内能B.温度越高的物体含有的热量越多,所以0℃的冰没有热量C.摩擦生热是通过做功的方式改变了物体的内能D.物体吸收热量,内能增加,温度一定升高(★★★) 3. 对下列图片中的现象分析不正确的是()A.图中迅速向左推动活塞时,针筒内气体温度升高,表明压缩气体做功,气体内能增加B.图中两个铅柱经压后就会结合在一起,说明分子间存在相互作用的引力C.图中弹簧测力计的示数大于玻璃板的重力,是因为大气压的作用D.图中向烧瓶中打气,当瓶塞被冲开时,瓶内出现白雾是瓶内水蒸气液化产生的(★★★) 4. 学校智能防疫门禁系统,若有人来访,系统首先检测其体温,检测合格开关S 1自动闭合,再检测其人脸是否录入系统,检测到已录入开关S 2自动闭合,两项检测同时合格闸门打开,任意一项检测不合格则开关S 3自动闭合,警告红灯亮起,此时需门卫处闭合开关S 4才能将闸门打开。
下列电路设计符合要求的是()A.B.C.D.(★★) 5. 如图甲所示的电路中,闭合开关,两灯泡均发光,且两个完全相同的电流表指针偏转如图一所示,则通过灯泡L 1、L 2的电流分别为()A.0.3A,1.5A B.0.3A,1.2A C.1.2A,1.5A D.1.2A,0.3A(★★★) 6. 如图所示的电路中,电源电压为3V,当开关S 1、S 2都闭合时,则()A.电压表示数为3V B.电流表将被烧坏C.灯L1亮,灯L2不亮D.两只灯泡都将被烧坏(★★) 7. 小花回家,发现家里的洗衣机转筒在转动洗衣,电饭煲在煮饭,妈妈的手机在充电,而这些电能,都是城郊的发电厂输送过来的,下列关于能量转化的说法,正确的是()A.洗衣机转筒转动是为了把电能转化成内能B.电饭煲是把内能转化成电能C.手机在充电是把电能转化成化学能D.发电厂是把电能转化成机械能(★★) 8. 下列电路图中,电压、电流关系正确的是()A.I A>I B>I C B.U AC=U AB-U BCC.I A=I B+I C D.U AB=U CD+U EF(★★★) 9. 在如图所示的电路中,电源电压为6V,当闭合开关S后,两灯都未亮,电流表示数为零,电压表示数为6V。
陕西省西安市九年级上学期期末考试英语试题(A卷)及答案
陕西省西安市九年级上学期期末试题英语试卷及答案I. 单项选择(30%)1. All the children like the teachers ________ can understand them.A. whoB. whichC. whatD. whom2. Do you like music _______ makes you excited?A. thatB. whoC. whoseD. whom3. The postcards often remind me ________ my old friends.A. atB. forC. ofD. with4. I prefer ________ to ________.A. reading; watching TVB. read; watch TVC. to read; to watch TVD. to read; watching TV5. Lucy is one of ________ in her class.A. the good studentB. the better studentC. the best studentD. the best students6. We’ve seen musical bands ________ pretty strange names.A. haveB. hasC. withD. of7. Do you know the girl ________ father owns a company?A. whoB. whichC. thatD. whose8. The young man ________ is a friend of mine.A. who I had a talkB. whom I had a talk withC. which I had a talk withD. whom I had a talk9. When people want to relax themselves, they prefer ________ TV or listen to music rather than ________ newspapers.A. watching; readB. watching; to readC. to watch; readD. to watch; reading10. Liu Xiang runs ________ fast ________ no one can catch up with him.A. very; thatB. such; thatC. so; thatD. too; to11. How much did the computer ________ you? And how much time do you ________ on it every day?A. take; costB. spend; payC. cost; spendD. pay; take12. We should give a hand to the people ________ need help.A. whoB. whoseC. whomD. when13. She likes dancing ________ the light music.A. toB. alongC. withD. on14. Don’t tell a lie again. Try to be ________ honest boy.A. aB. anC. theD. /15. I prefer not to eat too much food ________ is fried, like French fried.A. thatB. whatC. itD. /16. These are the photos ________ were taken in France.A. whoseB. whoC. /D. which17. He is lazy. You can’t ________ him ________ his room every day.A. expect; to cleanB. expect; cleaningC. show; to cleanD. suit; clean18. Be sure ________ and tell me what happens.A. writingB. wroteC. writesD. to write19. I’d like to trek ______ the jungle.A. throughB. acrossC. overD. on20. ---Why do the people decide ______ these days?---Bec ause there’s not much to do.A. visitB. to visitC. not visitingD. not to visit21. My parents want to go ______ on vacation.A .somewhere peaceful B. dangerous somewhereC. somewhere boringD. fascinating somewhere22. Guangdong is _________the southeast of China.A. inB. onC. toD. at23. I have dreamed of ______________all over the world in the future.A. travelB. will travelC. to travelD. traveling24. They are willing __________ in my firm.A. workB. workingC. to workD. worked25.______ you live, I will find you at once.A. WhateverB. WheneverC. WhereverD. Whichever26. ---Would you like to go out for a walk with us ?---________.A. Thank youB. That’s all rightC. Yes,I’d love toD. Yes, I would27. Why not consider _________ Kunming next holiday?A.visitB.visitedC.visitingD.visits28. There are ____ stars in the sky and you can see them at night.A. thousand ofB. two thousandsC. thousands ofD. two thousands of29. The dictionary ________ me $ 5.A. paidB. costC. spentD. took30. Our country provided the people _____ plenty of things during the flood.A. inB. toC. ontoD. withⅡ. 完形填空(10%)Mrs. Green has lived in the city for about forty years. She is very ___1___ and has got a lot of money. But she never ___2___ something expensive for her family and always does all the ___3___ herself.One morning, when she got up, she felt ___4___. After breakfast she felt even worse. She found some medicine and ___5___ it. But it was useless to her and she had to go to a hospital. The doctor ___6___ and asked her to be in hospital, but she refused and went home on foot. As soon as she got home, the ___7___ rang. She hurried to answer it. The doctor told her she ___8___ her wallet in the hospital and a nurse had found it.“Could you tell me her name, please?” asked Mrs. Green.“Of course, Mrs. Green. Are you going to ___9___ her?” asked the doctor.“No, no.” The old woman said in a hurry, “My bag ___10___ three years ago. I want to know if she found it.1. A. rich B. poor C. good D. bad2. A. borrows B. lends C. sells D. buys3. A. homework B. housework C. school work D. farm work4. A. happy B. angry C. terrible D. sorry5. A. ate B. took C. threw D. burnt6. A. looked at her B. looked her upC. looked for herD. looked her over7. A. telephone B. bell C. clock D. door8. A. do B.did C. had left D. came9. A. help B. see C. welcome D. thank10. A. lost B. was lost C. forgot D. was forgotten Ⅲ. 阅读理解(30%)AA young American doctor was sleeping when suddenly his doorbell began to ring. It was already midnight. But what could the doctor do? He had to put on his coat and go downstairs.When he opened the door, he saw a man standing with his hat in his hand. “How do you do, sir?” said the man. “Can you come at once to a place out of town? It’s quite far but you have a car and I can show you the way.”“Certainly,” said the doctor, “I’m quite ready. I can come at once.” In a few minutes the car was standing at the front door, and the man got on the doctor’s car. They drove on for a long time, then the man said, ”Here we are. This is my home. Now I can pay you and you can go back to town.”“But I must see the patient,” the doctor said, “How can I go back without seeing the patient? Where is the patient?”“There is no patient,” explained the man, “Nobody is ill. I live here. You see, one must go home from a town, mustn’t he? There are no taxis at this time of the night, but a doctor often makes night calls, so excuse me. Here is your money. Thank you, doctor. Good night.”1. When the doorbell began to ring, the doctor_________.A. was sleeping downstairsB. was working downstairsC. was sleeping upstairsD. was working upstairs2. The man asked the doctor ________.A. to go to his houseB. to go downstairsC. to go to bedD. to go to a place out of town3.They left ________.A. at onceB. after a few minutesC. on footD. on a bike4.What the man wanted to do was only _________.A. to fool the doctorB. to give the doctor moneyC. to get home in the doctor’s carD. to play a joke with the doctor5. The doctor must be _________ at last.A. happyB. sadC. angryD. illBTwo farmers were on their way home one evening after a hard day's work. Both were tired. They happened to look up at the sky and saw a black cloud overhead."Ah!" said one farmer, "tomorrow we shall have rain and the rice will grow well." The second answered, "Nonsense (胡说), the rain will only kill the crops (庄稼)."So they began to quarrel (争吵). Just then a third farmer came along and asked them why they were quarreling. Both farmers explained about the black cloud."What cloud?" asked the third farmer. They all looked at the sky. The cloud was no longer there.6. The two farmers were _____.A. going homeB. going to the fieldC. going to workD. going to see their friend7. The two farmers _____ on that day.A. had a holidayB. didn't workC. worked hardD. wanted to quarrel with each other8. When there are black clouds in the sky, _____.A. it will rain soonB. it will be fineC. it will get hotD. the sun is shining brightly9. The two farmers fought (争吵) in words because _____.A. they were hungryB. it rainedC. one said the rain would do good to the crops and the other didn't think soD. they both hoped for rain10. The third farmer came and said to the other two. He _____.A. wanted to make friends with themB. joined them in the quarrelC. wanted to know why they were quarrelingD. had nothings to doCLong long ago, there was a young man who made his living by making tofu. One day, the tofu was not sold out. In order to keep the tofu fresh, he cut it into pieces and mixed some flavors (香料) in it. Then he put it into a crock (瓦罐) . Several days later, he opened the crock and found that the smell was terrible. But he tasted a piece. To his surprise, the taste was nice. An idea came into his mind----maybe the smelly (臭的) tofu would be a kind of special food. As expected, the smelly tofu became popular with local people, soon it was well know all over the whole nation.Now smelly tofu is the most special food in Hunan. And it is recommended (推荐) to all the people around the world.根据短文判断下列句子的正确(T)与错误(F)11. Long long ago, there was a young man who made tofu for a living.12.. A few days later, the young man opened the crock and found the smell wasgood.13. The young man didn’t think that the smelly tofu would be a kind of specialfood.14. Soon the smelly tofu became famous in the whole nation.15. Although the smelly tofu smelt terrible, it tasted nice.Ⅳ. 用所给单词正确形式或根据句意及单词首字母填空。
人教版(五四制)2019-2020九年级数学第一学期期末模拟测试题A(能力提升 附答案详解)
(1)设A′B′与CB相交于点D,
①当旋转角为β=25°,∠B′DB=°;
②当AB∥CB′时,求证:D是A′B′的中点;
(2)如图2,E是AC边上的点,且 ,P是A′B′边上的点,且∠A′PC=60°,连接EP、CP,已知AC=10,①当β=°时,EP长度最大,最大值为;
(1)将△ABC绕C点按逆时针方向旋转90°得到△A′B′C′,请在图中画出△A′B′C′;
(2)将△ABC向上平移1个单位,再向右平移5个单位得到△A″B″C″,请在图中画出△A″B″C″;
(3)若将△ABC绕原点O旋转180°,A的对应点A1的坐标是.
21.计算: cos45°.
22.(1)用计算器求图中∠A的正弦值、余弦值、正切值.
即S=y2﹣y1.
故选C.
点睛:本题是一道二次函数综合题,主要考查了二次函数的图象和性质.解题的关键在于要利用二次函数图象上的点并结合梯形面积公式由题意得: , ,故选答案B.
考点:函数的综合运用.
9.C
【解析】
∵直角△ABC中,∠C=90°,
∴tan∠BAC= ,
人教版(五四制)2019-2020九年级数学第一学期期末模拟测试题A
(能力提升附答案详解)
1.某几何体的主视图和左视图完全一样均如图所示,则该几何体的俯视图不可能是( )
A. B. C. D.
2.投一个普通骰子,有下述说法:①朝上一面的点数是偶数;②朝上一面的点数是整数;③朝上一面的点数是3的倍数;④朝上一面的点数是5的倍数。将上述事件按可能性的大小从大到小排列为()
又∵AC=30cm,tan∠BAC= ,
∴BC=AC⋅tan∠BAC=30× = (cm).
吉林省松原市长岭县逐梦芳华—阶段性学业水平测评卷(吉林省版九年级第七次考试A卷))物理.化学试
吉林省松原市长岭县逐梦芳华—阶段性学业水平测评卷(吉林省版九年级第七次考试A卷))物理.化学试题-初中化学一、选择题1.人类每时每刻都离不开空气,其中能供给呼吸和支持燃烧的气体是A.氮气B.氧气C.稀有气体D.水蒸气2.今年6月10日是中国传统的端午节,“吃粽子”是传承了几千年的习俗。
在下列制作粽子的过程中,一定发生化学变化的是A.清洗粽叶B.水浸糯米C.粽叶裹米D.生火煮粽3.火药是我国古代四大发明之一。
《本草纲目》中记载“火药乃焰消、硫黄、杉木炭所合,以为烽燧铳机诸药者”。
火药中的三种物质在点燃前并不发生反应,由此可见,火药属于A.纯净物B.混合物C.化合物D.单质4.玻璃棒是化学实验室常用的仪器之一、下列实验操作错误的是A.过滤浊液B.蒸发食盐水C.溶解氯化钠D.测pH时蘸取溶液5.下列做法中对人体健康无害的是A.用霉变的花生压榨食用油B.用硫黄燃烧熏蒸银耳使其变白C.用纯碱或小苏打蒸馒头D.用工业用盐亚硝酸钠腌制食物6.下列物质的用途错误的是A.铁—制作炊具B.稀硫酸—除铁锈C.一氧化碳—灭火D.熟石灰—改良酸性土壤7.化学广泛应用在生活和工农业生产中,下列说法正确的是A.吹灭蜡烛时,降低了蜡烛的着火点B.烧碱易吸水且没有腐蚀性,可以用作食品干燥剂C.可用点燃的方法区分羊毛和合成纤维D.硝酸铵(NH4NO3)和硝酸钾(KNO3)都属于复合肥料8.下列对宏观事实的微观解释错误的是A.氧气经压缩储存在钢瓶中—压强增大,分子间的间隔变小B.电解水生成氢气和氧气—化学反应前后,原子的种类改变C.金刚石和石墨的物理性质差异很大—二者的碳原子排列方式不同D.水和过氧化氢的化学性质不同—二者的分子构成不同9.元素化合价和物质类别是认识物质的两个重要维度,构建元素化合价和物质类别的二维图是学习化学的一种重要方法。
下图是部分含铁元素物质的“化合价-物质类别”二维图。
下列说法错误的是A.物质a在氧气中燃烧生成物质bB.物质c是赤铁矿的主要成分C.若物质d的化学式为Fe(OH)3,则X对应的物质类别是碱D.物质e的溶液呈浅绿色,物质f的溶液呈黄色10.用稀盐酸进行的下列实验中,不能达到实验目的的是A.检验露置在空气中的NaOH溶液是否变质:取样,加入过量的稀盐酸B.除去NaCl溶液中混有的Na2CO3杂质:滴加稀盐酸至溶液的pH=7C.区分木炭粉和CuO粉末:取样,分别加稀盐酸D.比较Cu和Ag的金属活动性:将铜丝和银丝分别与稀盐酸混合二、填空与简答11.用化学用语回答下列问题。
2024-2025学年阶段性学业水平测评卷(吉林省九年级上学期期中考试A卷)数学试题
2024-2025学年阶段性学业水平测评卷(吉林省九年级上学期期中考试A 卷)数学试题一、单选题1.抛物线224y x =-的顶点坐标是()A .()2,4B .()0,4-C .()0,4D .()2,4-2.下列垃圾分类标识的图案既是轴对称图形,又是中心对称图形的是()A .B .C .D .3.平面内,已知O 的半径是5cm ,线段6cm OP =,则点P 在()A .O 外B .O 上C .O 内D .无法确定4.如图,在O 中,OC ⊥弦A 于点C ,4AB =,1OC =,则OB 的长为()A .17B .15CD .35.如图,一名男生推铅球,铅球行进高度y (单位:m )与水平距离x (单位:m )之间的关系是()214312y x =--+,则他将铅球推出的距离为()A .3mB .4mC .7mD .10m6.《九章算术》是我国传统数学的重要著作之一,奠定了我国传统数学的基本框架.《九章算术》中记载:“今有户高多于广六尺八寸,两隅相去适一丈.问户高、广各几何?”大意:有一形状是矩形的门,它的高比宽多6尺8寸,它的对角线长1丈,问它的高与宽各是多少?利用方程思想,设矩形门高为x 尺,则依题意所列方程为(1丈10=尺,1尺10=寸)()A .()2226.810x x ++=B .()2226.810x x +-=C .()226.810x x +=D .()226.810x x -=二、填空题7.点()3,2M -关于原点对称的点的坐标是.8.如图,以点O 为旋转中心,将AOB ∠按顺时针方向旋转110︒得到COD ∠,若40AOB ∠=︒,则AOD ∠=°.9.已知函数2=32y x x a ++-的图象过原点,则a 的值为10.将一元二次方程()()252x x x +=-化为一般形式2100x ax ++=则a 的值为.11.如图,BC 为O 的直径,弦CD OA ∥.若50C ∠=︒,则A ∠=°.12.如图,四边形ABCD 内接于⊙O ,E 是BC 延长线上一点,若∠BAD=105°,则∠DCE 的度数是°.13.当=时,代数式2421x x +-的值与代数式232x -的值相等.14.若一个两位数的十位,个位上的数字分别为a ,b ,则通常记作这个两位数为ab ,于是10ab a b =+.如:()()101010910a a a a a -=+-=+,当()9910x x ⨯-的值最大时,x 的值为.三、解答题15.用适当的方法解方程:2230x x --=.16.若二次函数2y ax =的图象经过点()2,4P -,求该函数的解析式并写出对称轴.17.如图,在Rt ABC △中,90ACB ∠=︒,2AC CB ==,将ABC V 绕点A 按逆时针方向旋转90°得到ADE V .(1)线段DE 的长是______,EAC ∠的度数是______°;(2)连接CD ,求证:四边形ACDE 是平行四边形.18.在平面直角坐标系中,抛物线21y ax bx =++经过点()1,0和()1,4-.(1)求此抛物线的解析式;(2)若点()12,A y ,()23,B y 都在该抛物线上,则1y _______2y .(填“>”“<”或“=”)19.如图,在5×5的正方形网格纸中,已知格点M 和格点线段AC ,请按要求画出AC 为对角线的格点四边形(顶点均在格点上).(1)在图①中画出四边形ABCD ,使得四边形ABCD 是中心对称图形,且点M 在四边形ABCD 的内部(不包括边界上).(2)在图②中画出四边形AECF ,使得四边形AECF 既是轴对称图形,又是中心对称图形,且点M 在四边形ABCD 的边界上(不包括顶点上).20.如图,A ,P ,B ,C 是半径为8的⊙O 上的四点,且满足∠BAC=∠APC=60°,(1)求证:△ABC 是等边三角形;(2)求圆心O 到BC 的距离OD .21.如图,在平面直角坐标系中,OAB △的三个顶点的坐标分别为()6,3A ,()0,5B ,0,0.(1)将OAB △向左平移5个单位长度得到111O A B △,请画出111O A B △;(2)画出OAB △绕原点O 顺时针方向旋转90︒后得到的22OA B △;(3)OAB ∠的度数为_______︒.22.如图,二次函数2y x bx c =-++的图象经过点()1,0A -,其对称轴为直线1x =,与x 轴的另一个交点为C ,与y 轴交于点B .(1)点C 的坐标为______;(2)将二次函数的图象向下平移3个单位长度,求平移后的二次函数的解析式.23.如图,足球场上守门员在O 处开出一高球,球从离地面1米的A 处飞出(A 在y 轴上),运动员乙在距O 点6米的B 处发现球在自己头的正上方达到最高点M ,距地面约4米高,球落地后又一次弹起.据实验测算,足球在草坪上弹起后的抛物线与原来的抛物线形状相同,最大高度减少到原来最大高度的一半.(1)求足球开始飞出到第一次落地时,该抛物线的表达式.(2)足球第一次落地点C 距守门员多少米?(取7=)(3)运动员乙要抢到第二个落点D ,他应再向前跑多少米?(取5=)24.已知△ABC 是等腰三角形,AB=AC .(1)特殊情形:如图1,当DE ∥BC 时,有DB EC .(填“>”,“<”或“=”)(2)发现探究:若将图1中的△ADE 绕点A 顺时针旋转α(0°<α<180°)到图2位置,则(1)中的结论还成立吗?若成立,请给予证明;若不成立,请说明理由.(3)拓展运用:如图3,P 是等腰直角三角形ABC 内一点,∠ACB=90°,且PB=1,PC=2,PA=3,求∠BPC 的度数.25.如图,在Rt ABC △中,90ACB ∠=︒,30A ∠=︒,2cm BC =.点P 从点A 出发,以2/s cm 的速度沿A B C →→向终点C 运动,过点P 作直线AC 的垂线交AC 于点D ,当点P 与A 、C 不重合时,作点A 关于点D 的对称点Q ,设点P 的运动时间为()s 03x x <<,APQ △与ABC V 重叠部分图形的面积是2cm y .(1)AB 的长为______;(2)当点Q 与点C 重合,求x 的值;(3)求y 关于x 的函数解析式,并写出自变量x 的取值范围.26.如图,在平面直角坐标系中,点A ,B 分别在x 轴,y 轴的正半轴上,3OA OB ==.经过点O ,A 的抛物线L :2y ax bx =+交AB 于点C ,点C 的横坐标为1.点P 在线段AB 上,当点P 与点C 不重合时,过点P 作PQ y ∥轴,与抛物线交于点Q .以PQ 为边向右侧作矩形PQMN ,且1PN =.设点P 的横坐标为m 时,解答下列问题.(1)求此抛物线L 的解析式;(2)当抛物线的顶点落在边PN 上时,求m 的值;(3)矩形PQMN 为正方形时,直接写出m 的值.。
2022-2023学年福建省漳州市九年级上学期期末语文试题A卷
2022-2023学年福建省漳州市九年级上学期期末语文试题A卷1. 下面是“开卷寻光”阅读交流活动。
请依据情境,将同学的发言补充完整。
晓语同学:我在古诗文里寻光。
“何处望神州?__________”,辛弃疾俯瞰广袤中原,燃烧着炽热爱国激情;“______,____ ”,刘禹锡遭受贬谪弃置,保持着乐观进取态度;“伤心秦汉经行处,_______ ”,张养浩奔赴陕西赈灾,胸怀着世间苦难苍生;“ _______?_______ ”,文天祥兵败被俘,用生命书写壮烈誓词!高风亮节,辉映史册,曹刿肯定“_______,__________ ,必以情”,这是民本之心;诸葛亮告诫“不宜妄自菲薄,_______”,这是治国之策;范仲淹提出“先天下之忧而优,_______ ”,这是古仁人至高之境。
真知灼见,烛照前程。
晓文同学:经典名著中也有一道光。
诗人艾青饱含深情,以“_____ ”和“太阳”为主要意象,表达眷恋祖国的情怀和驱逐黑暗的美好愿望;传奇人物简·爱坚守自尊,在得知罗切斯特妻子的存在后,选择____,她的灵魂熠熠生辉;斯诺笔下,小小的红星在艰苦卓绝的困境中求索,最终汇聚成满天星光!晓华同学:是啊!“理想是光,照亮复兴之路。
”还记得吗?这是 2022 年9月“开学第一课”的第四篇章。
我想说这句话——《红星照耀中国》是一束光,照亮我的人生之路。
比如,“红小鬼”一节,那些少先队员无论行军多么疲乏,都保持着乐观的姿态,这种姿态消除了我的悲观情绪;再比如,“长征”一章,____。
2. 消防员,是逆向而行的光。
下面文字是中国消防宣传短片《我们的样子》的面外音,说帮忙完善。
我们是什么?我们是市井烟火的守望,是高山林海的守驴,是风雨背后的zhē挡;我们是逆向而行的强光,是洪水()中带你回家的轻舟,是火魔()时护你安宁的屏障。
我们的使命是什么?,我们的成长是什么?是在海拔高处火量过的热血青春,是在林海最深处磨砺过的坚rèn 内心,是在浓烟烈火中锻造出的丰满羽yì,是在每一次救援中路得出去的生命,我们是“火焰蓝”,有青春的样子,有热血的样子,有()的样子。
陕西省安康市紫阳县2021-2022学年九年级上学期期末语文试题(A卷)
2021—2022学年度第一学期期末学业水平测试九年级语文试题(卷)一、积累和运用(共6小题,计17分)1.下列各组词语中,加点字的读音全都正确的一组是()(2分)A.摇曳.(yì)妖娆.(ráo)谪.守(zhē)自惭形秽.(huì)B.折.本(shé)箱箧.(qiè)娉.婷(pīng)孜.孜不倦(zī)C.箴.言(zhēng)旁骛.(wù)朴.刀(pǔ)箪.食壶浆(dān)D.坍.塌(tān)星宿.(sù)诓.骗(kuāng)矫.揉造作(jiāo)2.下列各组词语中,汉字书写全都正确的一组是()(2分)A.篝火秘决忸怩作态思贤如喝.B.绸缎鳄然如雷惯耳鸠占鹊巢C.清洌掺杂前仆后继断章取义D.隔膜促侠根深蒂固自爆自弃3.请从所给的三个词语中,选出一个最符合语境的填写在横线上。
(2分)(1)在乐队之交响演奏中,掺入一丝一毫的杂声,都会______(打压中伤击中)整个的和谐。
(2)这位学者感慨道,中国的脱贫攻坚,不仅取得了物质上的累累硕果,也凝聚起______(持之以恒固执己见一意孤行)的精神力量,锻造形成了脱贫攻坚的精神品质。
4.经典诗文默写。
(6分)(1)金樽清酒斗十千,______。
[李白《行路难》(其一)](2)______,水满陂塘。
(秦观《行香子》)(3)行人莫问当年事,______。
(许浑《咸阳城东楼》)(4)______,千里共婵娟。
(苏轼《水调歌头》)(5)沉舟侧畔千帆过,______。
(刘禹锡《酬乐天扬州初逢席上见赠》)(6)若夫日出而林霏开,______。
(欧阳修《醉翁亭记》)5.阅读语段,按要求完成下面的题目。
(3分)①读书是一种精神的漫游,是一种心灵的跋涉;是沉重之外的飘逸,是静默之中的摇曳。
②书的浩瀚不容轻觑,书的神圣不可亵渎。
③读书______附庸风雅,______出自内心对知识的渴求。
④读书需要心无旁骛,不被俗世的喧闹所扰。
四川省雅安中学2023-2024学年九年级上期阶段质量评估语文试题(含解析)
雅安中学2023—2024学年九年级上期阶段质量评估2语文试题A卷(共100分)第Ⅰ卷(选择题,共24分)一、基础知识(每小题2分,共12分)1.下列句子中加点字词的注音正确的一项是()A.假如一个男人跟朋友见面时彬.彬(bīng)有礼,可是在家里对妻子儿女动不动就大发雷霆..(léi tíng)——那就可以肯定他不是一个有教养的人。
B.这一彩幻只是稍作驻留,顷刻..(qǐng)间便飘忽不定,相互交融,暗淡隐去,可又骤.然(zhóu)反光灼.灼(zhuò),瞬.息(shùn)万变,真是无穷变幻,纷至沓来;洁白轻柔的云朵,微光闪烁,仿佛身披霓裳..(nísháng)羽衣的纯洁天使。
C.他们每走一步都忧心忡忡..(zhùcáng)点,无异于直接走向死亡。
..(chōnɡ),因为一旦偏离方向,错过了贮藏D.到了秋天,植物的叶子渐渐变黄,在秋风中簌簌..(sù)地落下。
北雁南飞,活跃在田间草际的昆虫也都销声匿.(nì)迹。
到处呈现一片衰.(shuāi)草连天的景象,准备迎接风雪载.(zǎi)途的寒冬。
2.下列语句书写有误的一项是()A.我还顺着人们远眺的目光看见了玉龙雪山,晶莹夺目矗立在蓝天之下面。
潭水映照雪山,真让人目炫神迷啊。
B.这世间真正温煦的美色,都熨帖着大地,潜伏在深谷。
C.也许因为我们不过是小小的草民,即便怀有效仿的渴望,也总是可望而不可即,便以位卑宽宥了自己。
D.当它戛然而止的时候,世界出奇地寂静……耳畔是一声渺远的鸡啼。
3.下面语段中加点的成语使用有误的一项是()面对苦难,对待苦难的态度和心境决定我们的命运:软弱的灵魂面对苦难,畏葸不前.......,知难而退,甚至偏安一隅.,刚愎自用....,不惮....,梦想幻灭,你最终只能成为平庸之辈;唯有勇敢地承受生活给与你的所有的苦难,披荆斩棘于在坎坷的道路上前行,才能活出优雅高贵的人生,人生终将迎来美丽的绽放。
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2013-2014学年第一学期(九)年级英语期中试卷(A 卷)考生须知:1.本试卷分听力和笔试两部分。
满分120分,考试时间90分钟。
2.答题前,必须在答题卷的密封区内填写校名、班级、姓名、试场号、座位号。
3.所有答案都必须做在答题卷标定的位置上,务必注意试题序号和答题序号相对应。
写在其他地方无效。
I.听力部分(20分)一、听力第一节:听小对话,选择正确的图片。
(共5小题,计5分)你将听到五个句子,请你根据所听到的内容,选择与画面内容意思相符的选项,每个句子仅读一遍。
A B C D E1. 2. 3. 4. 5.第二节 :听较长对话。
根据所听到的对话内容,选择最佳答案。
(共5小题,计5分)听下面一段对话,回答第6、7题。
( ) 6. Who often does the housework in Mike ’s family ?A. MikeB. Mike ’s motherC. Mike ’s father( ) 7. What is Mike ’s father good at ?A. CookingB. CleaningC. Shopping听下面一段对话,回答第8至10题。
( ) 8. Where is the man now ?A. At homeB. At a cinemaC. In a street( ) 9. Where is the man going ?A. To a post officeB. To a bookstoreC. To a cinema( ) 10. How will the man go there ?A. On footB. By busC. By car第三节:听独白,根据内容,请从请从A 、B 、C 三个选项中选择正确的选项完成信息表。
(共5小题,计10分)11. A. A dressB. A T-shirtC. A pair of trousers 12. A. SmallB. MiddleC. Large 13. A. GreenB. RedC. Yellow14. A. Cotton B. Wool C. Nylon15. A. 50 dollars B.60 dollars C.80 dollarsII. 笔试部分(100分)二、单项选择(共15小题,每小题1分,共15分)16. Our school is bigger than ___________.A. theirsB. theirC. themD. they17. My train will leave _____ ten so I have to get to the station before nine forty.A. inB. onC. atD. for18.—do you study for tests?—I study listening to tapes.A. How; with B: What; with C: How; by D. What; by19. Sixteen-year-olds to drive.A. is allowedB. are not allowedC. allowedD. is not allowed20. Great changes _____ in my hometown since 1980.A. have been taken placeB. took placeC. have taken placeD. were taken place21. I’m trying to study. Please turn the TV.A. offB. onC. upD. down22. The old theatre will close soon ________ some extra donations are made.A. soB. ifC. becauseD. unless23. My grandma ________ us stories when I was young.A. was used to tellB. is used to tellingC. used to tellD. used to telling24. Which of the following signs shows people the way to go out of a building?D.25. Something was wrong with my Iphone, so I ______ yesterday.A. had it repairB. had it repairsC. had it repairedD. has it repair26. —Can you tell me the best way ________ the problem?A. solveB. solvedC. to solveD. solving27.The hard work made me _______very tired .A. feelB. to feellC. feelingD. feels28._______the man is very old , _______he has never stopped studying .A. Though , butB. Though , andC. Though , /D. / , Though29.The old man doesn’t hear very well . There is _____ with his ears .A. anything wrongB. something wrongC. wrong anythingD. wrong something30. — I think she should stop wearing those silly earrings.—_________. I like those earrings. She looks so cool.A. I agreeB. I disagreeC. I think soD. Of course二、完形填空(共15小题:每小题1 分,满分15 分)How do you get on 31 your teachers? Every day, we 32 hours with our teachers at school. We 33 them, and they teach us to be good people. The relationship between students and teachers is very important.Teachers care about our studies and lives, and it seems they know everything about the subjects they teach. They also have the right (权利) to decide 34 should be the class leaders or represent the class to take part in the activities.So, many students want to be the teacher' s pet. We 35 teachers great respect(尊重). In class, we obey the rules and keep 36 if the teacher doesn' t ask us to speak. We 37 have opinions different 38 our teachers'. When they make a mistake, we are afraid 39 . Some of us don ' t want to contact (联系) teachers after class because we don' t want to bother (打扰) them.At American 40 , the situation is a little different. Teachers and students are more like friends. 41 a teacher by his or her name is common. In class, students express their opinions 42 and challenge (挑战) teachers when they don' t agree. If it turns out that a teacher made a mistake, the teacher will say " 43 " in front of the whole class. Students and teachers alsocommunicate through e-mail, Facebook or Twitter after class. They chat 44 studies and life experiences.Teachers 45 our parents and our friends. So we should respect our teachers.31. A. to B. and C. with D. along32. A. cost B. take C. pay D. spend33. A. learn about B. learn from C. come from D. hear about34. A. that B. which C. who D. what35 .A. send B. make C. tell D. show36. A. quiet B. noisy C. fired D. sleepy37. A. often B. usually C. always D. hardly38. A. to B. with C. as D. from39. A. point it out B. to point it out C. to point out it D. point out it40. A. families B. offices C. schools D. shops41. A. Calling B. Call C. Calls D. Called42. A. really B. quickly C. freely D. regularly43. A. OK B. thanks C. sorry D. yes44. A. for B. about C. with D. to45. A. like B. are like C. looks like D. seems like四、阅读理解(共15小题,每小题2分,计30分)A46. If you want to enjoy country music, you should call _____ .A. 8115608B. 3102768C. 2711399D. 693509447.If you want to learn Spanish dancing with one of your friends, how much do you and yourfriend need to pay?A. 500B. 1000C. 600D. 58848. In which year did Titanic sink in the Atlantic?A. 2012B.1992C.1942D. 1912BBilly and Bobby were small boys. They were brothers, and they often fought each other.Last Saturday their mother said to them, ―I’m going to cook our lunch now. go out and play in the garden……and be good.‖―Yes, Mum,‖ the two boys answered, and they out.They played in the garden for half an hour, and then Billy ran in. ―Mum,‖ he said, ―Bobby’s broken a window in Mrs Allen’s house.‖ Mrs Allen was one of their neighbours.―He’s a bad boy,‖ his mother said. ―How did he break it?‖―I threw a stone at him,‖ Billy answered, ―and he quickly moved down.‖49. Billy and Bobby were .A、sistersB、classmatesC、not often kind to each otherD、always kind to each other50. Last Saturday their mother asked them .A、not to play in the gardenB、to cook their lunchC、not to go outD、to be good51. broke the window.A、Mrs AllenB、BillyC、BobbyD、The motherCYou’re going to high school,aren’t you? Maybe you don’t know what to do.Well, here’s a list of the top six things to do when you’re in high school.These things will give you ideas of what your high school life could be like.Here you go!①Find your passion(激情) and what kind of person you are:Whether it’s dance,basketball,or drawing,the important thing is that you have found something you are interested in.②Talk to people you wouldn’t usually talk to:Meet new people,find new friends and even talk to the people you don’t like.It will show what a great person you are.You never know what will happen after high school.③Take part in at least one contest(竞赛):This will give you tears(眼泪) of laughter,happiness and memories.④Get a job:This will help you see what it’s like to have responsibility(责任).It can also help you make a little money to spend on yourself.⑤Take a trip with your friends:It doesn’t matter where you go or what you do,the memorieswill happen on the way and go on till the final place.⑥Do your best at school:Don’t ever get lazy.Working hard now will help you in the future.52.The writer mainly tells you six things you should do ________.A.in your high school yearsB.at the beginning of your high school yearsC.before your high school beginsD.after you finish your high school53.The writer gives you advice that you should talk to the people you don’t li ke because ________.A.you will feel sorry if not B.it will show how great you areC.you can show how clever you are D.you can make your study better54.Which of the following you’d better not do according to the passage?A.Find your interest.B.Get a job.C.Take a trip with your friends.D.Get lazy.55.What’s the main idea of the passage?A.Have a happy school life.B.How to get along with your schoolmates.C.Ideas of successful high school life.D.Make your school life easy.D①The DreamIt is everyone’s dream to work at home or not work at all.You can plan your own hours and work when you want to.There is no more rush hour and no hours that people waste when they get to and from a job every day.②The FactThe fact is that this dream can be attained.You can stay at home,work when you want to and make money when you need to.There are plenty of opportunities for you to make money at home,just by using your computer and the Internet.③Start Today!Educate yourself,look closely into all the opportunities and decide on what works best for you.It will not happen during one night,but you can make the decision today and start to make it happen today.④How Could You Do It?Do you have a blog(博客)or a personal website like millions of other people? Are you using it to make money? Most of these blog and website owners are not.But you can do that!⑤When you have your computer and the Internet working for you,your businesses will be working for you 24 hours a day,seven days a week.You will make money while you sleep,travel or do whatever you want to do all day long.⑥Get Going!There are many ways you can make money with your computer.And you can begin yourStay – at – home businesses with just a little money .What are you waiting for ?56.In which part of a newspaper would you most probably read this passage?A .SportsB .NewsC .CultureD .Business57. According to the text, what is everyone’s dream?A. sleep all day at homeB. travel all over the worldC. work and make easy money at homeD. play computer games at home58.What does the underlined word ―attained ‖ in Point ② mean ?A .打破B .实现C .丢失D .破坏59.What’s the best title for Point ⑤ ?A .Sleep 24 Hours a DayB .Make Money Every MomentC .Play All Day LongD .Travel Around the World60.Which of the following is NOT TRUE according to the passage ?A .People need a lot of money to start a stay – at – home business.B .People can even use their blogs to make money.C .People can plan their own time when they work at home.D .People can make the best decision and start to make it happen today. 五、任务型阅读 (61-64题,每条横线1个答案,共8条横线,计8分。