2013-2014第二学期第一次阶段性考试卷及答案
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时间:90分钟 总分:100分可能用到的原子量H 1 C 12 N 14 O 16 Na 23 Cl 35.5 Zn 65一、选择题(每小题只有一个选项符合题意,1-8题每题2分,9-18题每题3分,共46分)1.C 136-NMR (核磁共振)可用于含碳化合物的结构分析,C 136表示的是( )A .核外有13个电子,其中6个能参与成键B .核内有6个质子,核外有7个电子C .质量数是13,原子序数是6,核内有7个质子D .质量数是13,原子序数是6,核内有7个中子2.下列各组粒子中属于同位素的是 ( ) A .16O 和18O B .H 2O 和D 2O C .H 2和D 2 D .24Mg 和24Na3.元素性质呈周期性变化根本原因是: ( ) A .元素的相对原子质量逐渐增大 B .核外电子排布呈周期性变化 C .核电荷数逐渐增大 D .元素化合价呈周期性变化4.下列反应的能量变化属于吸热反应的是 ( ) A .氯化铵与Ba(OH)2·8H 2O 的反应 B .氢氧化钠溶液与盐酸反应 C .锌片与稀硫酸反应 D .钠与冷水反应 5 .下列说法正确的是 ( )A. 若反应X + Y = M 是放热反应,该反应一定不用加热。
B. 需要加热方能发生的反应一定是吸热反应。
C. CO 2与CaO 化合是放热反应,则CaCO 3分解是吸热反应。
D. 1mol 硫酸与足量氢氧化钠发生中和反应生成水所释放的热量称为中和热。
6.下列物质的电子式书写正确的是 ( )A .NaClB .H 2SC .CCl 4:D .NH 4I7.对于反应A 2+3B 2=2C 来说,以下化学反应速率的表示中,反应速率最快的是( ) A. v(B 2)=0.8 mol/ (L ·s) B. v(A 2)=0.4 mol/ (L ·s) C. v(C)=0.6 mol/ (L ·s) D. v(B 2)= 4.2 mol/ (L ·s)8.下列四种盐酸溶液,均能跟锌片反应,其中最初反应速率最快的是 ( )A .10℃ 20mL 3mol/L 的盐酸溶液B .20℃ 10mL 4mol/L 的盐酸溶液C .20℃ 20mL 2mol/L 的盐酸溶液D .20℃ 30mL 2mol/L 的盐酸溶液 9.下列说法正确的是 ( )A .Na ,Mg ,Al 还原性依次减弱B .HCl ,PH 3,H 2S 稳定性依次减弱C .NaOH ,KOH ,CsOH 碱性依次减弱D .S 2-,Cl -,Ca 2+半径依次增大 10.已知空气—锌电池的电极反应为 ()浏阳一中2014年上期高一第一次阶段性测试试卷理科化学锌片:Zn+2OH――2e-=ZnO+H2O;碳棒:O2+2H2O+4e-=4OH-,据此判断,锌片是A.正极,被还原B.正极,被氧化C.负极,被还原D.负极,被氧化11.下列各组化合物中,化学键类型完全相同的是()A.CaCl2和Na2SB.Na2O 和Na2O2C.CO2和CaOD.HCl 和NaOH12.氯仿可作麻醉剂,但常因保存不慎而被空气氧化,产生剧毒光气(COCl2):2CHCl3+O2=2HCl+2COCl2。
菏泽三桐2013-2014学年度第二学期第一次考试高二年级英语试卷A注意事项:1. 答第Ⅰ卷前,考生务必将自己的姓名、准考证号、考试科目用铅笔涂写在答题卡上.2.每题选出答案后,用2B铅笔把答题卡对应题目的答案标号涂黑.如需改动,用橡皮擦干净后,再改涂在其它答案标号.第一部分:英语知识运用(共两节,满分45分)第一节:语法和词汇知识(共15分;每小题1分)1.The good thing about children is that they ____very easily to new environments .A. adaptB. appealC. attachD. adopt2. –Sorry , I’m late , I got stuck in traffic--____ . I’m sure you can do better next time.A. You are welcomeB. That’s rightC. I have no ideaD. Never mind3. It’s important ___the youth ___learn a foreign language nowadays.A. of ; toB. for ; thatC. with ; toD. for ; to4. –Is that 120? My brother is seriously ill --Ok . Help is ____.A. in the wayB. in many waysC. on the wayD. by the way5. So sometimes some children in my primary school would laugh, when I got ____after a short way.A. out of breathB. out of workC. out of dateD. out of pity6. He ___his post because he had been offered a better job.A. resignedB. retiredC. dismissedD. fired7. --- ___to you __your great success ! –Thank you very much .A. Celebrate ; forB. Congratulate ; onC. Congratulation ; onD. Congratulations ; on8. Tom and Jack are both very clever , ___Tom is as clever a boy as JackA. All in allB. In other wordsC. In wordD. In short9. ---What did she say? –oh nothing ____. She only wanted me to give a hand .A. in allB. in funC. in specialD. in particular10. His physical disability makes ___rather difficult for him to find a good job.A. himB. thatC. thisD. it .11. –Have you moved into your new house ? –Not yet . It _____.A. is being paintedB. is paintedC. is paintingD. has been painted12.Luckily ,we’d brought a road map without____ we would have lost our wayA. itB. thatC. whichD. this13. Children ought ___ to treat the old with respect .A. teachingB. teachC. to be taughtD. be teaching14. As he ___he was surprised to see that the man had disappeared.A. turned roundB. turned awayC. turned outD. turned up15.The lake ___because of the dry weather .A. dried outB. driedC. dried awayD. dried up第二节:完形填空(共20小题;每小题1.5分)On a Saturday afternoon, a friend and I were throwing rocks onto the roof of an old lady’s house. Our game is to 16 how the rocks changed into missiles ( 飞弹) as they rolled to the roof’s edge and shot out into the yard like stars falling from the 17.I found such a smooth _18_that it slipped from my _19_as I let it go and headed straightly to a window of the old lady’s house. _20_the sound of broken glass, we ran away_21_ than any of our missiles that flew off her roof.I was too _22_of getting caught to go to the old lady’s. _23_, a few days later, when I was sure that I hadn’t been _24_, I started to feel guilty (内疚的) for her bad luck. She still 25__me with a smile each day when I passed her house, _26__I was no longer to act comfortably.I _27_ my mind that I would cover the cost of her __28__. I put seven dollars in a (an )_29__with a note explaining that I was _30__and hoped that the money would cover the cost of _31__it. I waited until it was 32_quietly slipped the envelope under the door.The next day, I met the old lady and was able to _33__the warm smile that I was receiving from her. She gave me a bag of cookies. I thanked her and left. When I was eating the cookies, I felt an envelope and __34_it out of the bag. I was _35__. Inside was the seven dollars and a short note that said, “ I am proud of you.”16. A. study B. guess C. explore D. see17. A. sky B. roof C. moon D. land18. A. star B. missile C. rock D. egg19. A. head B. eye C. hand D. shoulder20. A. In B. at C. on D. during21. A. Slower B. faster C. closer D. further22. A. Pleased B. afraid C. angry D. sad23. A. Anyhow B .so C. meanwhile D. however24. A. Discovered B. seen C. caught D. forgiven25. A. Surprised B. greeted C. punished D. listened26. A. Because B .and C. but D. if27. A. Took up B. made up C. turned up D. came up28. A. Door B. football C. window D. roof29. A. Bag B. bottle C. box D. envelope30. A. Sorry B. worried C. afraid D .moved31. A. Making B. selling C .repairing D. clearing32. A. Dark B. rainy C. windy D .bright33. A. Get B. return C. stop D. continue34. A. Pulled B. pushed C. tore D. picked35. A. Excited B. shocked C. frightened D. hurt第二部分:阅读理解(共25小题;每小题2分)AValencia is in the east part of Spain. It has a port on the sea,two miles away on the coast. It is the capital of a province that is also named Valencia. The city is a market centre for what is produced by the land around the city. Most of the city’s money is made from farming. It is also a busy business city,with ships,railways,clothes and machine factories. Valencia has an old part with white buildings,colored roofs,and narrow streets. The modern part has long,wide streets and new buildings. Valencia is well known for its parks and gardens. It has many old churches and museums. The university in the centre of the city was built in the 13th century. The city of Valencia has been known since the 2nd century. In the 8th century it was the capital of Spain. There is also an important city in Venezuela(委内瑞拉)named Valencia.36.From the text,how many places have the name Valencia?A. oneB. twoC. threeD. four37. What is the main difference between the two parts of Valencia?A. The colour of the buildingB. The length of the streetsC. The age of the buildingsD. The colour of the roofs38. When was Valencia the most important city in Spain?A.2nd centuryB.8th centuryC.13th centuryD. 20the century39 . What is Valencia famous for?A. Its seaportB. Its universityC. Its churches and museumsD. Its parks and gardens40. The main income of the city of Valencia is from its ______.A. marketsB. businessC. factoriesD. farmingBPlants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air,water and sunlight. Animals and man cannot make food from air,water and sunlight. Animals get their food by eating plants and other animals. Therefore animals and man need plants in order to live. This is why we find that there are so many plants around us.If you look carefully at the plants around you,you will find that there are two kinds of plants:flowering plants and non-flowering plants.Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed,some have two,three or four,and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit. Most non-flowering plants do not grow from seeds. They grow from spores(胚芽)。
菏泽三桐2013-2014学年度第二学期第一次考试高一年级语文试卷注意事项:1. 答第Ⅰ卷前,考生务必将自己的姓名、准考证号、考试科目用铅笔涂写在答题卡上.2.每题选出答案后,用2B铅笔把答题卡对应题目的答案标号涂黑.如需改动,用橡皮擦干净后,再改涂在其它答案标号.一、基础知识(共45分,每小题3分)1.下列加点字读音全正确的一项( )A.伛偻.(lǔ)鬈.曲(juán)马厩.(jiù) 殷.红(yīn)B.骨髓.(suǐ)稀薄.(bó)蹩.(biã)进自诩.(xǔ)C.湮.没(yān)躯壳.(kã)逡.巡(qūn)谥.号(yì)D.憎.恨(zâng)矿藏.(cáng)疏浚.(jùn) 逮.(dǎi)捕2.下列句子中没有错别字的一项是()A.碧油油的春草是多么柔软、茂盛,充满着生机!青青的草色,一直绵沿到春天的足迹所能达到的辽远的天涯……草比花有时更能引起人们许多的联想和暇思。
B.脸庞黄皱皱的,头发和胡子是微红和鬈曲,双颊和嘴角间斜挂着整齐的皱纹,话音很单调,喉音很重;因为皮革是一种死板板的物品,本来就有点僵硬和迟钝。
C.要不然,则当佳节大典之际,他们拿不出东西,只好瞌头贺喜,讨一点残羹冷炙做奖赏。
D.随着网络功能的日益强大,以简短的文字记录信息并进行传递的发贴子成为网民们日常生活的一部分,极大方便和丰富了网民的生活。
3.下列选项中词语使用最恰当的一项是()①这幢小屋既然得以幸存,一定是受到了什么光辉的照耀或是某位神明的-----,才能历尽沧桑,而未跟别的楼舍同遭厄运。
②一个人年纪大了而又 ----- 起来以至于赊账的时候,不知怎么的,他决不赊格斯拉兄弟俩的账。
③因此,我们不应以偏赅全地将某种文化中的单一元素视为衡量文化的唯一尺度,更不能不加分析地用一种文化来------ 和取代另一种文化。
A.庇护荒谬统筹 B.保护荒谬统管.C.庇护荒唐统摄 D.袒护荒诞统管4.下列句子中加点的成语使用有误的一项是()A.你可以想像得到那真是振聋发聩....。
广东省揭阳一中2013-2014学年下学期高二第一次阶段考试化学试卷,有答案(满分:100分考试时间:90分钟)可能用到的相对原子质量:C-12 H-1 O-16 N-14 S-32 Br-80第Ⅰ卷(本卷共2题,共50分)一、单项选择题(每小题只有1个选项符合题意,每小题2分,共30分)1.关于煤、石油、天然气等资源的说法正确的是( )A.石油裂解得到的汽油是纯净物 B.石油产品都可用于聚合反应C.天然气是一种清洁的化工原料 D.水煤气是通过煤的液化得到的气体燃料2.下列有机物的命名正确的是()A. 3,3-二甲基丁烷 B.3-甲基-2-丁烯C. 2-乙基丁烷 D.2,3,5–三甲基己烷3.下列各组物质中,相互间一定互为同系物的是()A.C4H10和C20H42B.邻二甲苯和对二甲苯C.C4H8和C3H6D.一溴乙烷和1,2—二溴乙烷4.制取较纯的一氯乙烷,用下列哪种方法最好()A.乙烷和氯气取代 B.乙烯加成氢气,再用氯气取代C.乙烯和氯化氢加成 D.乙烯和氯气加成5.由2-氯丙烷为主要原料制取1,2-丙二醇CH3CH(OH)CH2OH时,经过的反应为()A.加成反应—消去反应—取代反应 B.消去反应—加成反应—取代反应C.消去反应—取代反应—加成反应 D.取代反应—加成反应—消去反应6.用括号中的试剂除去各组物质中的少量杂质正确的是()A.苯中的甲苯(溴水) B.乙烷中的乙烯(氢气)C.溴苯中的溴(碘化钾溶液) D.乙醇中的水(新制的CaO)7. 1mol某烃在氧气中充分燃烧,需要消耗氧气179.2 L(标准状况下)。
它在光照的条件下与氯气反应能生成三种不同的一氯取代物。
该烃的结构简式是()A.CH3CH2CH2CH2CH3 B.C. D.CH3 H3C8.等物质的量的与Br2起加成反应,生成的产物不可能是()A.Br BrB.BrBrC.Br BrD.BrBr9.一种气态烷烃和一种气态烯烃的混合物共10g,平均相对分子质量为25。
2013-2014学年度第二学期第一次阶段测试七年级数学试题(满分:150分 时间:100分钟) 一、选择题(本大题10个小题,每小题3分,共30分)1. 3-1等于 ………………………………………………………………………………( ) A. 3 B. -31C. -3D.31 2. 下列运算中,结果正确的是…………………………………………………………( ) A. a •a =a2 B. a 2+a 2=a 4 C. (a 3)2=a 5 D. a 3a 3=a3. 计算(-2x 2)3的结果是…………………………………………………………………( ) A. -2x 5 B. -8x 6 C. -2x 6 D. -8x 54. 一个多边形的内角和不可能是………………………………………………………( ) A. 360° B. 910° C. 1080° D. 1800°5. 如图,△ABC 经过平移得到△A ’B ’C ’,下列说法错误的是………………………( ) A. AA ’=BB ’ B. BB ’//CC ’ C. ∠B =∠A ’ D. AC //A ’ C ’6. 如图,直线l //m ,将含有45°角的三角形板ABC 的直角顶点C 放在直线m 上,若∠1=25°, 则∠2的度数为………………………………………………………………………( ) A. 20° B. 25° C. 30° D. 35°7. 在△ABC 中,∠A =2∠B =3∠C ,则此三角形是……………………………………( ) A. 锐角三角形 B. 直角三角形 C. 钝角三角形 D. 等腰三角形8. 如图,有a 、b 、c 三户家用电路接入电表,相邻电路的电线等距排列,则三户所用电线 …………………………………………………………………………………………( ) A. a 户最长 B. b 户最长 C. c 户最长 D. 三户一样长9. 如图,在△ABC 中,把△ABC 沿直线AD 翻折180°,使点C 落在点B 的位置,则线段AD 是……………………………………………………………………………………( ) A. 边BC 上的中线 B. 边BC 上的高 C. ∠BAC 的平分线 D. 以上都是10. 如图,AD 、BE 是△ABC 的中线,则下列结论中,正确的个数有…………………( ) (1)S △AOE =S △COE ;(2)S △AOB =S 四边形EODC ;(3)S △BOC =2S △COE ;(4)S △ABC =4S △BOC . A. 1个 B. 2个 D. 4个命题:龚建飞审核:七年级备课组学校 班级 姓名 考场 座位号……………………………………密……………………………………封…………………………………线……………………………………………………………………………………第5题图 第6题图二、填空题(本大题12个小题,每小题3分,共36分) 11. (1)(x 2)3= ; (2)(-3x )2= . 12.(1)x •( )= x 3; (2)( )a 2= a 3.13. 根据你学习的数学知识,写出一个运算结果为a 6的算式 . 14. 一个多边形的每一个内角都是150º,则这个多边形是 边形. 15. 等腰三角形的两边长为3和5,则它的周长为 .16. 如图,直线a 、b 被直线c 所截,若要a //b ,需增加条件 (填一 个即可).17. 生物具有遗传多样性,遗传信息大多储存在DNA 分子上,一个DNA 分子的直径约为0.0000002cm ,这个数量用科学记数法可表示为 . 18. 已知∠A 的两边与∠B 的两边互相平行,若∠A =65º,则∠B = . 19. 在用计算器计算一个多边形的内角和时,小明的结果为2005°,小芳立即判断他的结果是错误的,小明仔细地复算了一遍,果然发现自己把一个角的度数输入了两遍.根据以上事实,多输的这个角度是 °,这个多边形的边数是_________.20. 如图 ,直角△ABC 沿点B 到点C 的方向平移到△DEF 位置,若AB =6,DH =2,平移的距离为3,则阴影部分DHCF 的面积等于 .21. 如图,OB 、OC 分别是内角∠ABC 、外角∠ACD 的平分线,若∠A =60º,则∠O = º. 22. 如图,已知点P 是射线ON 上一动点(可在射线ON 上运动),∠AON =300,当∠A 满 足 时,△AOP 为钝角三角形.第22题图第21题图第20题图ba 第16题图三、解答题(本大题8个小题,共84分) 23.(本题满分10分)计算:(1)-22 ()-2+ |-2|-(-2)0; (2)(-0.5)2013×22014.24.(本题满分10分)计算:(1)(-x 2)•(-2x )3-(-x 2)3(-x 3)2; (2)(b -a )5(a -b )3•(a -b )2.25.(本题满分8分)先化简,再求值:32233)21()(ab b a -+-⋅,其中441==b a ,.26.(本题满分10分)若3x =2,3y =4,求92x +y +272x -y 的值.27.(本题满分10分)如图,△ABC 的顶点都在方格纸的格点上.将△ABC 向左平移2格,再向上平移4格.(1)请在图中画出平移后的△A ′B ′C′;(2)作直线B ′C′,并画出△A ′B ′C ′边B ′C ′上的高A ′D ′; (3)求出△ABC 的面积;(4)写出图中与∠C 相等的角 .28.(本题满分10分)已知:如图,△ABC . 求证:∠A +∠B +∠C =180°.29.(本题满分12分)如图,从下列三个条件中:(1)AB //CD ;(2)∠E=90º;(3)AE 、CE 分别平分∠BAC 、∠ACD ,任选两个作为条件,另一个作为结论,编一道数学题,并说明理由. 已知: . 结论: . 理由:第28题图第29题图30.(本题满分14分)操作与探究:如图,直线AC ∥BD ,连结AB ,直线AC 、BD 及线段AB 把平面分成①、②、③、④四个部分,规定:线上各点不属于任何部分.当动点P 落在某个部分时,连结P A 、PB ,构成∠P AC 、∠APB 、∠PBD 三个角.(提示:有公共端点的两条重合的射线所组成的角是0°)(1)如图1,当动点P 落在第①部分时,求证:∠APB =∠P AC +∠PBD ;(2)当动点P 落在第②部分时,∠APB =∠P AC +∠PBD 是否成立(直接回答成立或不成立)?(3)当动点P 落在第③部分时,全面探究∠P AC 、∠APB 、∠PBD 之间的关系,并写出动点P 的具体位置和相应的结论.选择其中一种结论加以证明.参考答案及评分标准1-10 D ABBC ACDDC11.(1)x 6;(2)9x 2 12.(1)x 2;(2)a 5 13.(a 2)3=a 6或a 2a 4=a 6或a 8a 2=a 6 14. 十二 15. 11或13 16. ∠1=∠3或∠1=∠4或∠1+∠2=180º 17. 2×10-7 18. 65º或115º 19. 25º,十三③ ④图1③ ④ 备用图③ ④ 备用图20. 15 21. 30 22. 0º<∠A <60º或90º<∠A <150º 23.(1)0;(2)-2. 24.(1)8x 5+1;(2)-(a -b )4. 25. 原式=a 3b 6………5分 =56. ………3分 26. 257.27.(1)如图所示;……………………………………………3分 (2)如图所示;……………………………………………2分 (3)8 ………………………………………………………2分 (4)∠C′和∠C′AB. ………………………………………3分 28. 证明一:过A 点作DE ∥BC ∵DE ∥BC∴∠1=∠B ,∠2=∠C ∵∠1+∠2+∠A =180° ∴∠B +∠C +∠A =180°.证明二:作BC 的延长线CD ,过点C 作射线CE ∥BA . ∵CE ∥BA∴∠B =∠2, ∠A =∠1 ∵∠ACB +∠1+∠2=180° ∴∠ACB +∠A +∠B =180°.29. (1)(3)(2)或(2)(3)(1)证明略.30. (1)解法一:如图9-1 延长BP 交直线AC 于点E .AC BD ∵∥,PEA PBD ∠=∠∴. APB PAE PEA ∠=∠+∠∵,APB PAC PBD ∠=∠+∠∴.……………………3分解法二:如图9-2 过点P 作FP AC ∥. PAC APF ∠=∠∴.AC BD ∵∥,FP BD ∴∥. FPB PBD ∠=∠∴.APB APF FPB PAC PBD ∠=∠+∠=∠+∠∴. 解法三:如图9-3AC BD ∵∥,180CAB ABD ∠+∠=∴°,ABC DP①②③④E 图9-1A BCDP①F图9-2AC③即180PAC PAB PBA PBD ∠+∠+∠+∠=°. 又180APB PBA PAB ∠+∠+∠=°, APB PAC PBD ∠=∠+∠∴.(2)不成立.……………………2分(3)(a )当动点P 在射线BA 的右侧时,结论是PBD PAC APB ∠=∠+∠.…………2分(b )当动点P 在射线BA 上,结论是PBD PAC APB ∠=∠+∠,或PAC PBD APB ∠=∠+∠或0APB ∠=°,PAC PBD ∠=∠(任写一个即可).……………………2分(c )当动点P 在射线BA 的左侧时,结论是PAC APB PBD ∠=∠+∠.……………………2分选择(a )证明:如图9-4,连接PA ,连接PB 交AC 于M . AC BD ∵∥, PMC PBD ∠=∠∴.又PMC PAM APM ∠=∠+∠∵,PBD PAC APB ∠=∠+∠∴.……………………3分选择(b )证明:如图9-5∵点P 在射线BA 上,0APB ∠=∴°. AC BD ∵∥,PBD PAC ∠=∠∴. PBD PAC APB ∠=∠+∠∴ 或PAC PBD APB ∠=∠+∠或0APB ∠=°,PAC PBD ∠=∠.选择(c )证明:如图9-6,连接PA ,连接PB 交AC 于F . AC BD ∵∥,PFA FBD ∠=∠∴. PAC APF PFA ∠=∠+∠∵, PAC APB FBD ∠=∠+∠∴.A BC DP① ② ③ ④ 图9-4MBD④ 图9-5ABCDP①②③图9-6。
广东省揭阳一中2013-2014学年高一下学期第一次阶段考试语文试题 2014.3说明:本卷满分150分。
答题时间150分钟。
考生必须在答题卷作答才能得分。
一、积累与运用(共23分。
第1—7题各2分,第8—10题各3分)1.下列加点词注音全对的一项是()A.浣.女(huàn)谄.媚(xiàn)邂.逅(xiâ)B.惘.然(wǎnɡ)纶.巾(ɡuān)铜钿.(tián)C.湓浦.(pǔ)贾.人(ɡǔ)嘲.哳(zāo)D.迸.发(bânɡ)谪.居(zhã)锦瑟.(sì)2.下列加点字全读前面拼音读音的一项是()A.zháo 着.急着.忙着.落上不着.天B.zhōnɡ中.辍中.用中.看中.饱私囊C.yān 咽.喉殷.红嫣.红奄奄..一息D.huǐ后悔.晦.暗教诲.毁.家纾难3.下列两道题加点词解释全对的一项是A.寻声暗.问弹者谁(偷偷地问)去来.江口守空船(回来)B.银瓶乍.破水浆迸(骤然)今漂沦.憔悴(堕落)C.凝绝不通声暂.歇(忽然)如听仙乐耳暂.明(暂时)D.整顿衣裳起敛.容(庄重的)钿头银篦击节.碎(拍子)4.下列两道题加点词解释全对的一项是A.小弦切切..(叹息)..如私语(形容声音急骤)又闻此语重唧唧B.最难将息..(忧愁苦恼的样子)..(休养,调理)凄凄惨惨戚戚C.枫叶荻花秋瑟瑟..半江红(碧绿色)..(萧条的样子)半江瑟瑟D.风流..千里烟波(分手后越来越远)..总被雨打风吹去(英雄豪杰)念去去5. 下列选项句子不是倒装句的一项是()A.蜀道之难,难于上青天B.应是良辰美景虚设C.尝学琵琶于穆、曹二善才D.莲动下渔舟6. 下列与“自言本是京城女”句式相同的一项是()A.莲,花之君子者也。
B.委身为商人妇。
C.使快弹数曲D.茅屋为秋风所破歌7. 下列句子中没有活用词语的一项是()A.商人重利轻别离B.青海长云暗雪山C.侧身西望常咨嗟D.一尊还酹江月8. 下面语段中加点的词语,使用不恰当的一项是( )我喜欢的杂志《读者》,它质朴厚重,纸张之间关注世界,心怀天下,它的文章有的如话家常,娓.娓道来....,有的如阳光,让悲观失望的你奋进……纵观所有文章,它从不...,让人温暖,有的如警钟震耳欲聋哗众取宠....,如一件纯棉内衣柔软透气、宽松舒适,贴近我们心口,给予我们温暖。
广东省揭阳一中2013-2014学年下学期高二第一次阶段考试英语试卷Ⅰ.听力理解(共两节, 满分15分)第一节听力理解(4段共10小题; 每小题1分, 满分10分.)听第一段对话, 回答第1—2题.1.How many more movies in the series does the man plan to watch?A. Three.B. Four.C. Five.2. What will the man do tonight?A. Prepare for his math test.B. Go and see his cousin.C. Watch movies at home.听第二段对话, 回答第3—5题.3. Where does the woman think ice cream was invented?A. In Italy.B. In France.C. In China.4. What do we know from the conversation?A. Ice cream was first brought to America by the Italians.B. George Washington once served ice cream in the White House.C. The hand-turned ice cream freezer was invented by an American.5. When was the first ice cream business opened in Maryland?A. In 1660.B. In 1846.C. In 1851.听第三段独白, 回答第6—8题.6.What did the speaker’s mother ask her father to do?A.Get some wine from the supermarket.B.Drive her to the supermarket.C. Teach the speaker to drive.7.What happened after the speaker started the car?A. She hit a tree.B. She crashed into a wall.C. She crashed into another car.8. How did the speaker’s father react?A. He scolded the speaker.B. He comforted the speaker.C. He stood there in silence.听第四段对话, 回答第9—10题.9.Why does the woman want to go to the Tate Modern?A. She wants to take some pictures.B. There isn’t any charge for admissionC. She wants to visit the Tower of London by the way.10. What do we know about the man?A. He visited Westminster Abbey the day before yesterday.B. He didn’t visit Big Ben because of rain.C. He is traveling with his friends.第二节听取信息(共5小题; 每小题1分, 满分5分)Ⅱ.语言知识及运用(共两节, 满分45分)第一节完形填空(共15小题;每小题2分,满分30分)Some years ago, Houston airport faced a troubling customer-relations issue. Passengers were making a huge number of 16 about the long waits at baggage claim (行李提取处). In response, the airport managers 17 the number of baggage handlers. The plan worked: the average wait fell to eight minutes. But the complaints 18 despite the apparent success.19 , the managers undertook a more careful, on-site analysis. They found that it took passengers a minute to walk from their 20 gates to baggage claim and seven more minutes to get their bags. Roughly 88 percent of their time, in other words, was spent standing around 21 waiting for their bags.So the airport decided on a new approach: instead of reducing wait time, it 22 the arrival gates farther away from baggage claim area. Passengers now had to 23 six times longer to get their bags. Complaints dropped to near zero.This story shows a general 24 : the experience of waiting is defined only partly by the actual length of the wait. Often the psychology of queuing is more 25 than the length of the wait itself. Occupied time (walking to baggage claim) feels 26 than unoccupied time (standing at baggage claim). Research on 27 has shown that, on average, people overestimate how long they’ve waited in a lin e by about 36 percent.This is also why one finds mirrors next to lifts. The spread of high-rise buildings after WorldWar II led to complaints about lift 28 . The motive behind the mirrors was 29 to the one used at the Houston airport: give people something to 30 their time, and the wait seems shorter.16. A. suggestions B. questions C. complaints D. challenges17. A. evaluated B. counted C. decreased D. increased18. A. continued B. disappeared C. doubled D. changed19. A. Annoyed B. Puzzled C. Discouraged D. Excited20. A. exit B. landing C. arrival D. departure21. A. uncomfortably B. aimlessly C. hopelessly D. impatiently22. A. freed B. sent C. moved D. removed23. A. wait B. walk C. waste D. sit24. A. principle B. approach C. belief D. reason25. A. scientific B. interesting C. useful D. important26. A. slower B. shorter C. more difficult D. more painful27. A. figures B. baggage C. queuing D. standing28. A. delays B. quality C. safety D. repairs29. A. devoted B. superior C. familiar D. similar30. A. take B. occupy C. use D. value第二节语法填空(共10小题;每小题1.5分,满分15分)What is a motto? A motto is a sentence or a phrase ____31____ can inspire us especially when we are____32____(face) with difficulties. Many of us have our mottoes such as “Where there is a will, there is a way.” Or “Nothing is difficult if you put your heart into it.” and so on. My motto is “God helps those who help ____33____.” Sometimes I am lazy and don’t want to make efforts____34____( work) hard, ____35____ the moment I think of my motto I will get energetic again and devote myself ____36____ what I am doing. I write my motto ____37____ I can see it easily. Every time I fail in my exam and begin to lose heart, the sight of my motto inspires me with much ____38____(confident). My motto also makes me become ____39____ independent person. That is to say, I won’t rely on others eas ily. My friends, what is your motto? If you still haven’t got a motto, please choose ____40____because a motto can have a great effect on you.Ⅲ阅读(共两节,满分50分)第一节阅读理解(共20小题,每小题2分,满分40分)(A)I remember my math teacher Mr.Young very well. He stood out because the kids made fun of him. He was missing one of his fingers, and always pointed at students with his middle finger.I was not very good at English and math. No matter how hard I tried, I just could not figure out why I did not understand what all the other kids found so easy to learn.One day, I was told that if I got one more E on my report card, I would be taken to the “big prison for kids”.I tried really hard for weeks. I just couldn’t understand how to make different parts of members into whole things.The day before report cards were to come out, I knew that Mr.Young would give me an E, just like he always did.I went to Mr. Young and told him that the orphanage (孤儿院) was going to send me to the big prison if I got another E on my report card. He told me there was nothing he could do; it would be unfair to the other kids if he gave me a better grade than I had actually earned.I smiled at him and said, “Mr.Young, do you know how the kids make fun of you because you’re missing your finger?” He looked at me, moved his mouth to one side and said nothing.“They shouldn’t do that to you because you can’t help not having a finger, Mr.Young.Just like I can’t help not being able to learn numbers and stuff like that.” I said.The next day, when I got my report card, I tucked it into one of my books. While on the school bus, I opened it: Geography, B+;Mechanical Drawing, C-;English, D-;History, C-;Gym, B+;Art, C; Math, D-.That math grade was the most favorite one I ever received, because I knew that someone in the world finally understood what it was like for me to be missing a finger inside my head.41.From the second paragraph we can infer that the boy is ________ in some subjects.A.mind-blowing(给人印象极深的) B.slow-witted(头脑迟钝的)C.fun-loving D.badly-behaved42.Where may the boy live according to the passage?A.In an orphanage. B.In a big prison. C.In the school dormitory. D.In his home.43.What grade should the boy have got in the math test this time?A.D-. B.B+C.D. D.E.44.The underlined word “tucked” in the passage most probably means “________”.A.struck B.listed C.hid D.copied45.The reason why the boy remembers Mr. Young is that ________.A.he missed one of his fingers B.he treated his students very wellC.he understood the boy D.he taught his students in a special way(B)Just as some people think that certain numbers are lucky or unlucky, others believe that we can use numbers to understand our personalities, or predict what will happen to us in the future.Numerology is a way of using numbers to describe a person’s character, and to make predictions about future life events. Numerologists use the numbers 1-9, 11 and 22 — also known as the “master” numbers —to help a person understand his or her personality, life goals, and destiny.Numerologists consider your Life Path number to be the most significant because this number describes your character. To find this number, add together all the numbers in your date of birth. For example, a person born on April 25, 1985 would add the month (4), to the numbers of the date (2+5), plus the numbers of the birth year (1+9+8+5). In this case the total is 34, so this person’s life path number is 7(3+4). Numerologists believe that people with this number are peaceful and affectionate but can also be very reserved.Your Expression number describes your talents and predicts how you should use these to fulfill your destiny in life. Numerologists assign a number between 1 and 9 to each of the letters in your name. These numbers are then added together in the same way as before to find your Expression number. Numerologists can also do calculations to predict when the most challenging periods of your life will be.Numerologists also believe that the day a person is born is important. Each day of the month has a character description. People born on the fourth are said to be responsible, honest, and stubborn. People born on the fifteenth have very strong attachments to family and home. Those who celebrate their birthday on the thirtieth are artistic, creative, and imaginative, and often make good writers.If we calculate the numerical value of our name and birth date, numerologists believe that we can learn more about our personalities. They also believe that we can predict our destinies, how our lives will progress, and what challenges we may face along the way. To the numerologist, numbers can be used in many more ways than we think.46. If a person was born on November 8, 1995, what is his Life Path number?A. 7B. 8C. 9D. 1147. To understand your abilities and how to use them in your life, you should calculate your ______.A. Life Path numberB. Expression numberC. birthdayD. name and birth date48. According to the passage, a person born on the fifteenth tends to be _______.A. stubbornB. home-lovingC. artisticD. imaginative49. According to the passage, numerologists believe that _________.A. Life Path number can be used to predict a person’s most challenging life periodsB. Expression number is the most mea ningful for people to learn a person’s characterC. numbers can help people better understand themselvesD. numbers can be used to change a person’s future50. The function of the passage is __________.A. to raise doubts about the usefulness of numerologyB. to persuade readers about the benefits of the practices it describesC. to describe some of the numerological practices and their purposeD. to tease those who take such beliefs seriously(C)The day when the jobs were handed out was one of the most exciting moments for all the children in the class. It took place during the first week of the term. Every kid was given a job for which they would be responsible for the rest of that school year.Some jobs were more interesting than others, and the children were eager to be given one of the best ones. When giving them out, the teacher took into account which pupils had been most responsible during the previous year. During the previous year Rita had carried out the teacher’s instructions perfectly. All the children knew Rita would be given the best job.But there was a big surprise. Each child received a normal job. But Rita’s job was very different. She was given a little box containing some sand and one ant. Though the teacher insisted that this ant was very special, Rita felt disappointed. Most of her classmates felt sorry for her. Even her father became very angry with the teacher and he encouraged Rita to pay no attention to this insignificant pet. However, Rita preferred to show the teacher her error by doing something special with that job of little interest.Rita started investigating all about her little ant and gave the ant the best food, and it grew quite a bit bigger.One day, a man, who looked very important, came into their classroom a nd declared, “Your class has been chosen to accompany me, this summer, on a journey to the tropical rain forest,where we will investigate all kinds of insects. Among all the schools of this region, your class has best cared for the little ant.”That day the school was filled with joy and celebration. Everyone thanked Rita for having been so patient and responsible. And many children learnt that to be given the most important task you have to know how to be responsible even in what are the smallest tasks.51. That the teacher gave out jobs to the children is based on _______.A. their characters and interestsB. their class performance during the previous yearC. their working performance during the previous yearD. their ability of managing their accounts during the previous year52. What does the underlined sentence mean?A. Each child got an important job.B. Each child got an interesting job.C. The perfect student got the job of everyone’s preferenceD. The most responsible student got the job of least interest.53. Rita’s attitude to her father’s suggestion is ________A. negativeB. uncertainC. totally positiveD. acceptive54. We can infer that the man who made the declaration is a _________.A. hunterB. directorC. biologistD. principal55. What would be the best title for the passage?A. Never complain about lifeB. Small tasks can lead to fortunesC. Men are best known by their friendsD. Responsibility and intelligence bring good luck(D)The idea about the phoenix goes back to Ancient Egypt, where we find the phoenix described as a handsome, eagle-like bird, with part-golden, part-red plumage, that spent most of its life in the Arabian deserts. It was rarely seen and according to one version of the story, only appeared in Egypt once every five hundred years, when it flew to Heliopolis, “city of the sun”, and deliberately burnt itself to ashes by settling on the altar(祭坛) flame there! However, it seems it did not really die because from those same ashes a young, fully formed phoenix was born and flew away, apparently back to Arabia.It is pretty obvious that no one has ever seen or will see a living phoenix. The interesting thing is that we can find certain clues which may explain one aspect of the Egyptians’ idea. It maysound unbelievable, but some birds are apparently quite charmed by flames and small fires, especially members of the crow family. One zoologist actually proved this by setting fire to some straw near to a tame(驯养的)rook. Far from becoming nervous and backing away, the bird deliberately stood over the flames, with raised and vibrating wings. It didn’t get burnt, but the image it presented by its strange behavior was almost exactly like that shown in illustrations of the mythical phoenix!Why birds should occasionally behave in this strange way is not clear. One idea is that they carefully use the heat of the flames to relieve the annoyance caused by their feather mites(虱) which all birds have. Whatever the reason, it is quite possible that the Ancient Egyptians saw birds behaving in this way, from time to time, and used it as the basis of their phoenix myth, adding fanciful details which closely linked it to their worship of the sun and their belief in resurrection. Nowadays, the phoenix is much less important to us than it was to the Egyptians. But the logo of modern fire insurance companies, which employ the phoenix as one of their symbols, refers that in one sense the idea of it remains.56. According to the passage, the phoenix ______________ .A. is a handsome and eagle-like bird living in ArabB. used to be seen when the Egyptians held religious activitiesC. has never really existed in the worldD. is the king of all kinds of birds57. The reason why birds stand above flames is probably that _____________ .A. the phoenix used to do soB. they may get rid of the mitesC. they want to burn their featherD. they can heat themselves58. Which of the following statements is NOT correct?A. The ancient Egyptians worshiped the phoenix.B. The scientists have discovered why birds are attracted by fire.C. The modern people still favor the idea of the phoenix.D. The mythical tales about the phoenix were based on facts.59. Which of the following is closest to “resurrection” in the 3rd paragraph?A. living foreverB. offering warmthC. coming back to lifeD. staying healthy60. What does the phoenix probably mean in the logo of a fire insurance company?A. Our company can protect you from being harmed by fire.B. If your property is destroyed by fire, we will help you build it up again.C. Our company will always be energetic and wealthy.D. If needed, we will save you at the risk of losing lives.第二节信息匹配(共5小题,每小题2分,满分10分)下面是一篇有关书籍介绍的应用文,请阅读下列应用文和相关信息,并按照要求匹配信息。
宁化一中2013-2014学年第二学期第一次阶段性考试高二数学试题(文科)一、选择题:(本大题共12小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的,请将正确答案的序号填在答题纸上.) 1.在复平面内,复数12z i =-+对应的点位于( ) A.第一象限 B.第三象限C.第二象限D.第四象限2.命题:“若220(,)a b a b R +=∈,则0a b ==”的逆否命题是( ) A.若0(,)a b a b R ≠≠∈,则220a b +≠B.若0(,)a b a b R =≠∈,则220a b +≠ C.若00(,)a b a b R ≠≠∈且,则220a b +≠ D.若00(,)a b a b R ≠≠∈或,则220a b +≠3. 下列三句话按“三段论”模式排列顺序正确的是( ) ① sin ()y x x R =∈是三角函数;② 三角函数是周期函数; ③ sin ()y x x R =∈是周期函数. A .① ② ③B. ② ① ③C.② ③ ①D.③ ② ①4.下图是《集合》的知识结构图,如果要加入“子集”,则应该放在( ) A .“集合的概念”的下位 B . “基本关系”的下位 C .“集合的表示”的下位 D .“基本运算”的下位5.用反证法证明命题时,对结论: “自然数中至少有一个是偶数”正确的假设为()A .都是奇数B .都是偶数C .中至少有两个偶数D .中至少有两个偶数或都是奇数 6. “1a >且2b >”是“3a b +>”成立的( )A .充分而不必要条件B .必要而不充分条件C .充分且必要条件D .既不充分也不必要条件7. 设集合{})1lg(|x y x A -==,集合{}2|x y y B ==,则=B A ( ) A .)1,(-∞ B .(]1,∞- C .[]1,0 D .[)1,0 8. 给出以下四个说法不正确...的是( ) A .残差点分布的带状区域的宽度越窄,相关指数越大;B .在刻画回归模型的拟合效果时,相关指数2R 的值越大,说明拟合的效果越好; C .对分类变量X 与Y ,若它们的随机变量2K 的观测值k 越小,则判断“X 与Y 有关系”的把握程度越大;D .在回归直线方程122.0ˆ+=x y中,当解释变量x 每增加一个单位时,预报变量y ˆ平均增加0.2个单位。
2013~2014学年度第二学期第一次单元练习七 年 级 数 学(考试时间:100分钟 总分:100分 )一、选择题:(本大题共10小题,每小题2分,共20分.在每小题给出的四个选项中,恰有一项是符合题目要求的,请将正确选项前的字母代号填在..答题纸相应位置.......上.) 1.点P (3,-5)在 A .第一象限内 B .第二象限内 C .第三象限内 D .第四象限内 2. 若点M (a —2,2a +3)是x 轴上的点,则a 的值是A .2B .23 C .32- D .-23.实数5,-37,38-,3.1415,2π,0,4.1010010001中,无理数的个数为A .2个B .3个C .4个D .5个 4.设a =15-1,a 在两个相邻整数之间,则这两个整数是 A .1和2 B .2和3 C .3和4 D .4和55.如图,︒=∠+∠18021,︒=∠1053,则4∠度数为A .︒75B .︒85C .︒95D .︒105 6.如图,小明在操场上从A 点出发,先沿南偏东32°方向走到B 点, 再沿南偏东62°方向走到C 点.这时,∠ABC 的度数是A .120°B .135°C .150°D .160°7.在如图所示的数轴上,AB AC 2=,A 、B 两点对应的实数分别为5和—1,则点C 所对应的实数是A .521+B .531+C .253+D .252-8.下列命题中是真命题的是A .从直线外一点到这条直线的垂线段叫做这点到这条直线的距离。
B .过一点有且只有一条直线与已知直线平行C .相等的角是对顶角D .过一点有且只有一条直线与已知直线垂直9.将一个直角三角板和一把直尺如图放置,如果∠α=42 °, 则∠β余角的度数是 A .︒42B .︒48C .︒30D .︒6010. 如图,长方形BCDE 的各边分别平行于x 轴或y 轴,物体甲和物体乙分别由点A (2,0)同时出发,沿长方形BCDE 的边作环绕运动,物体甲按逆时针方向以2个单位/秒匀速运动,物体乙按顺时针方向以1个单位/秒匀速运动,则两个物体运动后的第2014次相遇地点的坐标是 A .(2,0) B .(1-,1) C .(2-,1) D .(1-,1-) 二、填空题:(本大题共8小题,每小题3分,共24分.不需写出解答过程,请把答案直接填写在...答题纸相应位置.......上.) 11.5的平方根是 ▲ . 12. 如果一个数的平方根等于这个数的立方根,那么这个数是 ▲ . 13.若8)1(3-=-x ,则=x ▲ .14.把一张长方形纸条按右图中那样折叠后,若得到∠AOB ′= 70º,则∠OGC = ▲ .15.若414.12=,1414.0=a ,则a =_____▲___. 16.若点P (x ,y )是第二象限内的点,点P 到x 轴距离为3,到y 轴距离为5,则点P 的坐标是 ▲ .17.已知点A 坐标为)(52,2,若点A 是由点B 先向下平移5个单位,再向右平移2个单位得到的,则点B 的坐标为____▲_____.18.已知AB ∥ y 轴,A 点的坐标为(3,2),并且AB =5,则B 的坐标为 ▲ .三、解答题:(本大题共7小题,共56分.请在..答题纸指定区域.......内作答...,解答时应写出文 ac db4321'B 'C 1-05B C字说明、证明过程或演算步骤.)19(本题满分8分)计算(1)(4分)3201423125.01)2(274⨯---+-+)((2)(4分)233333--+)(20. (本题满分7分)如图,请你从①C B ∠=∠,②AD 平分BAC ∠的邻补角CAE ∠,③AD ∥BC 这三个论断中选择两个作为已知条件,证明余下的一个成立。
湖南省浏阳一中2013-2014学年高一下学期第一次阶段性测试英语卷(带解析)1.________ is exciting news that she has received a doctor’s degree.A. WhatB. ItC. ThisD. That【答案】B【解析】试题分析:句意:她已经得到了博士学位这是一个很令人兴奋的消息。
这里it做形式主语,真正的主语是that引导的主语从句,所以选B。
考点:考查it做形式主语2.The system of Braille is really _____________ to the blind.A. of great usefulB. great usefulC. great useD. of great use 【答案】D【解析】试题分析:句意:盲人系统对盲人真的是有用的。
这里使用be of+抽象名词=形容词,great 是形容词修饰名词use,of great use=very useful,所以选D。
考点:考查介词短语3.Doris’ success lies in the fact _______she is co-operative and eager to learn from others.A. whichB. thatC. whenD. why【答案】B【解析】试题分析:句意:Doris的成功在于她是善于合作的和渴望向别人学习的事实。
所以选B。
考点:考查同位语从句4._______ I’m not sure o f winning the match, I will have a try anyway.A. WhileB. BeforeC. OnceD. Since【答案】A【解析】试题分析:A. While当…时候,虽然,然而,B. Before在…前面,C. Once曾经,一旦,D. Since自从,因为,句意:虽然我对赢得比赛没有把握,但是不管怎样我会试一下的。
一、精心选一选(本大题共10小题,每小题3分,共30分,每题的四个选项中,只有一个....符合题意):1.比 -1小2的数是( ▲ )A .3B .-3C . 1-D .12. 要使分式有意义,则x 的取值范围是( ▲ ) A .x≠1 B . x >1C . x <1D . x ≠﹣1 A . 38=2-- B 9=3± C .(ab )2=ab 2 D .(﹣a 2)3=a 6 4. 钓鱼岛是中国的固有领土,位于中国东海,面积约4400000平方米,数据4400000用科学A .44×105B . 0.44×105C . 4.4×106D . 4.4×105A .内切B .相交C .外切D .外离6.以下列数组为边长中,能构成直角三角形的…………………( ▲ )A.1,1,3B.1,2,3C.31,41,51 D.2,3、5 7. 在Rt △ABC 中,∠C =90°,BC=4, AC =3,sin A 的值是( ▲ ). A .43 B .45 C .54 D .348、用半径为3cm ,圆心角是120°的扇形围成一个圆锥的侧面,则这个圆锥的底面半径为(▲ )A .1.5cmB .2πcmC .πcmD .1cm9. 如图.在ABCD 中,AB =6、AD =9,∠BAD 的平分线交BC 于点E ,DC 的延长线于点F, BG ⊥AE ,垂足为G ,若BG =2CEF 的面积是( ▲ )2 222第9 题图 第10 题图 10. 如图表示一个时钟的钟面垂直固定于水平桌面上,其中分针上有一点A ,且当钟面显示3点30分时,分针垂直于桌面,A 点距桌面的高度为10公分。
若此钟面显示3点45分时,A 点距桌面的高度为16公分,则钟面显示3点50分时,A 点距桌面的高度为(▲)公分?A .3322- B .π+16 C .18 D .19 二、仔细填一填 (本大题共8小题,每空2分,共计16分):11.-2的相反数是 ▲ .12.因式分解:=xy x - ▲ .13.抛物线y=(x-1)2+3的顶点坐标为 ▲14.方程16)1(2=+x 的根是 ▲ .15. 梯形的中位线长为4,上底长为2,则该梯形的下底长为 ▲ 第18 题图16.在一个不透明的口袋中装有 5 个完全相同的小球,把它们分别标号为 1,2,3,4,5, 从 中随机摸出一个小球,其标号大于 2 的概率为 ▲17.在半径为1的圆O 中有两条弦AB 、AC ,且AC =,则∠BAC= ▲ 18.如图,已知正方形ABCD 的边长为1,以顶点A 、B 为圆心,1为半径的两弧交于点E ,以顶点C 、D 为圆心,1为半径的两弧交于点F ,则EF 的长为 ▲ .三、解答题(本大题共10小题,共计84分.解答时应写出必要的证明过程或演算步骤.)19.(本题满分8分)(1001+2sin302⎛⎫ ⎪⎝⎭, (2)化简:112+-+a a a20.(本题满分8分)(1)解不等式组: x 74x+252x 154x<<-⎧⎨--⎩ (2)解方程:0442=++x x .21.(本题满分8分)目前“校园手机”现象越来越受到社会关注,针对这种现象,某中学九年级数学兴趣小组的同学随机调查了学校若干名家长对“中学生带手机”现象的看法,统计整理并制作了如下的统计图:(1)这次调查的家长总数为▲ .家长表示“不赞同”的人数为 ▲ ;(2)从这次接受调查的家长中随机抽查一个,恰好是“赞同”的家长的概率是 ▲ ;(3)求图②中表示家长“无所谓”的扇形圆心角的度数.22.(本题满分8分)如图,在□ABCD 中, E 、F 在边AB 上,且 BE=AF , CF=DE求证:(1)△DA E ≌△CBF (2)四边形ABCD 是矩形。
23. (本题满分8分)如图,放置在水平桌面上的台灯的灯臂AB 长为40cm ,灯罩BC 长为30cm ,底座厚度为2cm ,灯臂与底座构成的∠BAD =60°. 使用发现,光线最佳时灯罩BC 与水平线所成的角为30°,此时灯罩顶端C 到桌面的高度CE 是多少cm ?(结果精确到0.1cm ,参考数据:3≈1.732)第23 题图 第25 题图24.(本题满分8分)为打造“书香校园”,某学校计划用不超过1900本科技类书籍和1620本人文类书籍,组建中、小型两类图书角共30个.已知组建一个中型图书角需科技类书籍80本,人文类书籍50本;组建一个小型图书角需科技类书籍30本,人文类书籍60本.(1).问符合题意的组建方案有几种?请你帮学校设计出来;(2).若组建一个中型图书角的费用是860元,组建一个小型图书角的费用是570元,试说明在(1)中哪种方案费用最低?最低费用是多少元?(3).为节省开支,计划将每个中型图书角的组建费用降低m 元(3000≤<m )小型图书角的组建费用不变,问怎样安排才能使总费用最低?25.(本题满分8分)小颖和小亮上山游玩,小颖乘会缆车,小亮步行,两人相约在山顶的缆车终点会合.已知小亮行走到缆车终点的路程是缆车到山顶的线路长的2倍,小颖在小亮出发后50 min 才乘上缆车,缆车的平均速度为180 m/min .设小亮出发x min 后行走的路程为y m .图中的折线表示小亮在整个行走过程中y 与x 的函数关系.⑴小亮行走的总路程是__▲ ______m ,他途中休息了__▲ ____min .⑵①当50≤x≤80时,求y 与x 的函数关系式;②当小颖到达缆车终点为时,小亮离缆车终点的路程是多少?26.(本题满分8分)如图,在平面直角坐标系中,点A (10,0),以OA 为直径在第一象限内作半圆C ,点B 是该半圆周上的一动点,连结OB 、AB ,并延长AB 至点D ,使DB =AB ,过点D 作x 轴垂线,分别交x 轴、直线OB 于点E 、F ,点E 为垂足,连结CF .(1)当∠AOB =30°时,求弧AB 的长;(2)当DE =8时,求线段EF 的长;27.(本题满分10分)如图,ABCD 是一张矩形纸片,AD=BC=1,AB=CD=12+.在矩形ABCD 的边AB 上取一点M ,在CD 上取一点N ,将纸片沿MN 折叠,使MB 与DN 交于点K ,得到△MNK .(1)若∠1=70°,求∠MKN 的度数.(2)△MNK 的面积能否小于21?若能,求出此时∠1的度数;若不能,试说明理由. (3)如何折叠能够使△MNK 的面积最大?请你利用备用图探究可能出现的情况,求出最大值及∠1的度数。
(备用图)28.(本题满分10分)如图,在矩形OABC 中,AO=10,AB=8,沿直线CD 折叠矩形OABC 的一边BC ,使点B 落在OA 边上的点E 处.分别以OC ,OA 所在的直线为x 轴,y 轴建立平面直角坐标系,抛物线y=ax 2+bx+c 经过O ,D ,C 三点.(1)求AD 的长及抛物线的解析式;(2)一动点P 从点E 出发,沿EC 以每秒2个单位长的速度向点C 运动,同时动点Q 从点C 出发,沿CO 以每秒1个单位长的速度向点O 运动,当点P 运动到点C 时,两点同时停止运动.设运动时间为t 秒,当t 为何值时,以P 、Q 、C 为顶点的三角形与△ADE 相似?(3)点N 在抛物线对称轴上,点M 在抛物线上,是否存在这样的点M 与点N ,使以M ,N ,C ,E 为顶点的四边形是平行四边形?若存在,请直接写出点M 与点N 的坐标(不写求解过程);若不存在,请说明理由.初三数学第一次阶段性考试答案( 2014.3 )一、选择BAACA DBDAD二、填空 11. 2 12. x (y-1) 13.(1,3) 14.3,-5 15. 6 16. 60% 17. 75° 、15° 18.-1三、解答19. (1) 3 …4分 (2)11+a ………4分 20. (1) -3<x <5。
………4分 (2)解: 221-==x x ………4分 21.(每空2分)(1) 600 、 80 (2) 60% (3) 24°22. (8分) (略)23. (8分)过点B 作BF ⊥CD 于F ,作BG ⊥AD 于G .在Rt △BCF 中,∠CBF =30°,∴CF =BC·sin 30°= 30×12=15. …3分 在Rt △ABG 中,∠BAG =60°,∴BG =AB·sin 60°= 40×32 = 20 3. …6分 ∴CE =CF +FD +DE =15+203+2=17+203≈51.64≈51.6(cm )cm.答:此时灯罩顶端C 到桌面的高度CE 约是51.6cm. …8分 24. (8分) 解:(1)设组建中型图书角x 个,则组建小型图书角为(30-x )个.由题意,得80x +30(30−x )≤1900 50x +60(30−x )≤1620∴18≤x≤20.由于x 只能取整数,∴x 的取值是18,19,20. …3分当x=18时,30-x=12;当x=19时,30-x=11;当x=20时,30-x=10.(2):方法一:假设总费用为w 元,∴w=860x+570(30-x )=290x+17100,∴当x 取最小值18时,总费用最低,最低费用是290×18+17100=22320元.∴组建中型图书角18个,小型图书角12个,总费用最低,最低费用是22320元.…5分 方法二:①方案一的费用是:860×18+570×12=22320(元);②方案二的费用是:860×19+570×11=22610(元);③方案三的费用是:860×20+570×10=22900(元).(3). 设总费用为P 元,∴P=(860-m )x+570(30-x )=(290-m )x+17100,…6分② t=325 …6分 小亮离缆车终点的路程是32275 米. …8分 26. (8分)(1)∠ACB =2∠AOB =60°, …2分 弧AB 的长=35180560ππ=⨯⨯; ……4分 (2) △OEF ∽△DEA, …6分 EF =3;……8分27. (10分) (1)∠MKN=40°. (2分)(2)不能. 由折叠∠1=∠NMK,又DN ∥AM, ∠MNK=∠1, ∴∠MNK=∠NMK ,∴KN=KM,△MNK 的面积=KN=,∴KM 最小值为1,即KM ⊥AM, ∴∠MNK=∠1=45°,此时△MNK 的面积最小为,∴此三角形面积不能小于 (4分)(3)△MNK 的面积最大,只需KN 最大,又KN=KM 最大,于是可以有两种方法折叠,如图, 情形1:将矩形纸片对折,使点B 与D 重合,此时点K 也与点D 重合, 设MK=MD=x, 则AM=- x,由勾股定理,得, 1+, (5分)Sin ∠AMD= ∴ ∠AMD=45°, ∴ ∠1=67.5° (7分)情况2:将矩形纸片沿对角线AC 对折,此时折痕为AC .设MK =AK = CK =x ,则DK =-x ,同理可得x= 即MK=NK=∴ (8分)Sin ∠AKD=, ∠AKD=45°, ∴∠1=22.5°∴△MNK 的面积最大值为,∠1=67.5°或22.5° (10分)28.(1)AD=3 (2分) 解析式为:2216y x x 33=-+。