陕西历年高考真题Word
2015陕西高考数学试题及答案word版

2015陕西高考数学试题及答案word版2015年陕西省高考数学试题(文科)一、选择题:本题共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。
1. 若集合A={x|x^2+x-2=0},B={x|x^2-3x+2=0},则A∩B=A. {1}B. {2}C. {1,2}D. {-1,2}2. 若复数z满足z^2+z+1=0,则z的实部为A. -1B. 0C. 1D. 23. 若函数f(x)=x^3-3x+1在x=1处取得极值,则f'(x)=A. 3x^2-3B. 3x^2-2C. 3x^2+3D. 3x^2+24. 若直线l:y=kx+b与圆C:x^2+y^2=1相交于点A和点B,且|AB|=√2,则k的取值范围是A. (-∞,-1]∪[1,+∞)B. (-1,1)C. [-1,1]D. (-∞,-1)∪(1,+∞)5. 若等差数列{an}的前n项和为Sn,且S3=3,S6=9,则S9=A. 15B. 12C. 9D. 66. 若a,b,c是等比数列{bn}的连续三项,则A. ac=b^2B. a^2=bcC. ab=c^2D. a^2=c^27. 若函数f(x)=x^2-4x+m在区间[2,+∞)上单调递增,则实数m的取值范围是A. m≥-4B. m≤4C. m≥4D. m≤-48. 若双曲线C:x^2/a^2-y^2/b^2=1(a>0,b>0)的一条渐近线方程为y=√2x,则A. a=bB. a=√2bC. b=√2aD. b=2a9. 若从4名男生和3名女生中选出3人参加比赛,其中至少有1名女生,则不同的选法种数为A. 35B. 42C. 45D. 4810. 若从52张扑克牌中随机抽取一张,抽到红桃的概率为1/4,则A. 有13张红桃B. 有26张红桃C. 有39张红桃D. 有52张红桃11. 若函数f(x)=x^3-3x+1在区间[1,2]上存在零点,则A. f(1)f(2)<0B. f(1)f(2)>0C. f(1)f(2)=0D. f(1)=f(2)12. 若抛物线C:y^2=2px(p>0)的焦点为F,点P在抛物线上,且|PF|=2p,则点P的坐标为A. (p,2p)B. (p,-p)C. (2p,2p)D. (2p,-p)二、填空题:本题共4小题,每小题5分,共20分。
【全科】陕西省高考真题卷精校版文档版(有答案)-2015年普通高等学校招生统一考试

【全科】陕西省高考真题卷精校版文档版(有答案)-2015年普通高等学校招生统一考试语文 (1)英语试题 (17)理科综合能力测试试题 (33)文科综合 (58)理科数学 (71)文科数学 (84)绝密★启用前新课标Ⅰ2015年普通高等学校全国统一考试语文注意事项:1.本试卷分第I卷(阅读题)和第II卷(表达题)两部分.2.考生务必将自己的姓名、考生号填写在答题卡上。
3.作答时,将答案写在答题卡上。
写在本试卷上无效。
4.考试结束后.将本试卷和答题卡一并交回。
第I卷阅读题甲必考题一、现代文阅读(9分,毎小题3分)阅读下面的文字,完成1〜3题宋代的农业、手工业、商业在唐代的基础上又有了新的发展,特别是商品经济出现了空前的繁荣,在此背景下,宋代的货巾流通和信用进入迅速发展时期,开创了古代金融的新篇章。
宋代在信用形式和信用工具方面都呈现出新的特点。
信用形式有借贷、质、押、典、赊买赊卖等多种形式。
借贷分为政府借贷和私人借贷。
政府借贷主要表现为赈贷的形式,在紧急情况下通过贷给百姓粮食或种子的方式,帮助他们度过困境。
私人借贷多为高利贷,它可以解决社会分化和“钱荒”带来的平民百姓资金严重不足的问题,满足特殊支付和燃眉之急的需要。
质、押是借贷的担保形式,由质库、解库等机构经营。
质属于动产担保,它必须转移动产的占有;押属于不动产担保,通常将抵押物的契约交付债权人即可。
债务人违约时,债权人可用变卖价款优先受偿。
典作为不动产转移的一种形式是在宋代形成和发展起来的。
其特点是典权人向出典人支付典价后,在典期内就占有了出典人典产的使用权和收益支配权,出典人也不必向典权人支付利息。
宋代的商业贸易非常发达,但存在着通货紧缩现象,故赊买赊卖行为也很普遍,几乎生产、流通、消费领域的所有物品都能进行赊买赊卖。
从实际效果看,它解决了军需、加强了流通,更重要的一点,它对束缚生产流通扩大和发展的高利贷构成了冲击。
随着社会经济的发展,宋代商业贸易对货币的要求越来越高,但是社会中货币供给和流通状况不尽理想,表现为货币流通区域的割据性、货币供给数量的有限性,以及大量流通的铜铁钱细碎和不便携带的特性,其结果是抑制了经济发展。
陕西英语往年高考试题文档含答案

绝密★启用前2018年普通高等学校招生全国统一考试英语(考试时间:120分钟试卷满分:150分)注意事项:1. 答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。
2. 作答时,务必将答案写在答题卡上,写在本试卷及草稿纸上无效。
3. 考试结束后,将本试卷和答题卡一并交回。
第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上。
录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节(共5小题;每小题 1.5分,满分7.5分)听下面5短对话,每段对话后有一个小题,从题中给的A、B、C三个选项中选出最佳选项。
听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
例:How much is the shirt?A.£19.15.B.£9.18.C.£9.15.1.What does John find difficult in learning German?A.Pronunciation.B.Vocabulary.C.Grammar.2.What is the probable relationship between the speakers?A.Colleagues.B.Brother and sister.C.Teacher and student.3.Where does the conversation probably take place?A. In a bank.B. At a ticket office.C. On a train.4. What are the speakers talking about?A.A restaurant.B.A street.C.A dish.5.What does the woman think of her interview?A.It was tough.B.It was interesting.C.It was successful. 第二节(共15小题;每小题 1.5分,满分22.5分)听下面5段对话或独白,每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳选项。
高考真题——英语(陕西卷)Word版含解析

第一部分:英语知识运用(共四节,满分55分)第一节语音知识(共5小题;每小题1分,满分5分)从每小题的A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该选项涂黑。
1. stomachA. technologyB. exchangeC. chairD. church2. uncleA. concertB. strangeC. blanketD. autumn3. exactA. excellentB. exampleC. exerciseD. expensive4. tableA. cottageB. basketC. wakeD. family5. doubleA. soulB. groupC. pronounceD. couple【答案】1.A2.C3.B4.C5.D5.double和couple里面的字母ou都是读/ ? /,soul里面的字母ou读/??/,group里面的字母ou读/u:/,pronounce里面的字母ou读/au/,选D。
【考点定位】考查单词辨音第二节情景对话(共5小题;每小题1分,满分5分)根据对话情境和内容,从对话后所给的选项中选出能填入每一空白处的最佳选项,并在答题卡上将该选项涂黑。
选项中有两个为多余选项。
Doctor: Good morning, Sir. 6Johnson :Yes, doctor. I'm always tired but when I go to bed I can't sleep.Doctor: 7Johnson : Since I started my new job two months ago.Doctor : What is your job ?Johnson : I’m in advertising. 8Doctor : It depends. How many hours do you work?Johnson: About 80 hours a weekDoctor: 9 . Do you often take exercise?Johnson: Not very often. 10 .Doctor; Well, you do need to find some time. Try to work less, or look for a more stress-free job.A. That's a lot!B. I like my job.C. Does it matter?D. How can I help you?E. I don't have the time.F. What time do you usually go to bed?G.. How long have you had this problem?【答案】6.D7.G8.C9.A10.E10.根据上句:Not very often,可知这里是:我没有时间(锻炼)。
陕西高考试题及答案

陕西高考试题及答案一、选择题(每题4分,共40分)1. 下列关于秦朝历史的说法,正确的是:A. 秦朝是中国历史上第一个统一的多民族国家B. 秦朝的都城是长安C. 秦始皇统一了度量衡D. 秦朝实行的是分封制答案:A2. 西安是陕西省的省会,其古称是:A. 长安B. 洛阳C. 咸阳D. 镐京答案:A3. 陕西的省花是:A. 牡丹B. 玫瑰C. 菊花D. 月季答案:A4. 下列关于陕西地理的描述,错误的是:A. 陕西位于中国西北部B. 陕西是中国的历史文化名省C. 陕西的省会是西安D. 陕西是中国最大的省份答案:D5. 陕西的著名旅游景点兵马俑位于:A. 西安B. 北京C. 南京D. 上海答案:A6. 陕西的著名小吃有:A. 肉夹馍B. 煎饼果子C. 热干面D. 肠粉答案:A7. 陕西的著名历史人物有:A. 秦始皇B. 孔子C. 诸葛亮D. 李白答案:A8. 下列关于陕西的描述,正确的是:A. 陕西是中国的农业大省B. 陕西是中国的工业大省C. 陕西是中国的科技大省D. 陕西是中国的经济大省答案:B9. 陕西的著名山脉秦岭位于:A. 陕西南部B. 陕西北部C. 陕西东部D. 陕西西部答案:A10. 陕西的著名民间艺术有:A. 秦腔B. 京剧C. 川剧D. 越剧答案:A二、填空题(每题2分,共20分)1. 陕西的简称是______。
答案:陕或秦2. 陕西的省会是______。
答案:西安3. 陕西的省花是______。
答案:牡丹4. 陕西的著名历史人物有______。
答案:秦始皇5. 陕西的著名旅游景点有______。
答案:兵马俑6. 陕西的著名小吃有______。
答案:肉夹馍7. 陕西的著名山脉有______。
答案:秦岭8. 陕西的著名民间艺术有______。
答案:秦腔9. 陕西位于中国的______部。
答案:西北10. 陕西的省会西安的古称是______。
答案:长安三、简答题(每题10分,共20分)1. 简述陕西在中国历史文化中的地位。
陕西高考真题2019-2019年汇编(含答案)word资料60页

2019年陕西省高考英语真题第一部分第一大题英语知识运用(共三节,满分50分)第一节语音知识(共5小题;每小题1分,满分5分)从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该项涂黑。
例:haveA. gaveB. saveC. hatD. made答案是C。
1.honestA. hostB. hourC. habitD. husband2.occurA. oceanB. possibleC. positionD. offer3.enoughA. touchB. mouthC. soulD. shout4.wearA. nearB. requireC. cheerD. share5.watchedA. judgedB. workedC. refusedD. wanted语法和词汇知识(共15小题;每小题1分,满分15分)从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
例:We ________ last night, but se went to the concert instead.A. must have studiedB. might studyC. should have studiedD. would study答案是C。
6. I used to earn _______ than a pound a week when I first started work.A. a littleB. a fewC. fewerD. less7. —You look very tired _______ at all last night?—No, not really. I’m tired out now.A. Do you sleepB. Were you sleepingC. Did you sleepD. Had you slept8.She as educated at Beijing University, ________, she went on to have her advanced study abroad.A. after whichB. from whichC. from thatD. after that9. His plan was such a good one _________we all agreed to accept it.A. soB. andC. thatD. as10. My sister was against my suggestion while my brother was _________ it.A. in favor ofB. in memory ofC. in honor ofD. in search of11. —I’m terribly sorry that I made your table cloth dirty.—___________.A. Never mindB. Don’t mention itC. That’s rightD. Sorry12. The construction of the two new railway lines __________ by now.A. has completedB. have completedC. have been completedD. has been completed13. It is difficult to imagine his ________ the decision without any consideration.A. acceptB. acceptingC. to acceptD. accepted14. With no one to ________ in such a frightening situation, she felt very helpless.A. turn toB. turn onC. turn off C. turn over15. According to _________ World Health Organization, health care plans are needed in all big cities to prevent _________ spread of AIDS.A. the; 不填B. the; theC. a; aD. 不填; the16. Only then ___________ how much damage had been caused.A. she realizedB. she had realizedC. had she realizedD. did she realize17.Faced with a bill for $10,000,________.A. John has taken an extra jobB. the boss has given john an extra jobC. an extra job has been takenD. an extra job has been given to John18. He hurried to the booking office only _________ that all the tickets had been sold out.A. to tellB. to be toldC. tellingD. told19. As you worked late yesterday, you_________ have come this morning.A. mayn’tB. can’tC. mustn’tD. needn’t20. This is a very interesting book. I’ll buy it, __________.A. how much may it costB. no matter how it may costC. however much it may costD. how may it cost完形填空(共20小题;每小题1.5分,满分30分)阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。
2019陕西省高考试题及答案word版

2019陕西省高考试题及答案word版一、语文试题及答案1. 阅读下列文言文,回答问题。
(1)请解释文中“踌躇”的含义。
答案:踌躇,指犹豫不决的样子。
(2)文中“之”字的用法是什么?答案:文中“之”字用作代词,指代前文提到的事物。
2. 现代文阅读。
(1)文章中作者表达了哪些观点?答案:作者表达了对环境保护的重视和对自然美景的赞美。
(2)文章的结尾有何深意?答案:文章结尾暗示了人类与自然和谐共存的重要性。
二、数学试题及答案1. 解下列方程。
(1)x^2 - 5x + 6 = 0答案:x = 2 或 x = 3(2)求函数y = 2x + 3在x = 1时的值。
答案:y = 52. 几何题。
(1)证明三角形ABC是等边三角形。
答案:由于AB = BC = CA,所以三角形ABC是等边三角形。
(2)计算圆的面积,半径为5。
答案:面积= π * 5^2 = 25π三、英语试题及答案1. 单选题。
(1)What is the best title for the passage?A. Environment ProtectionB. Technology AdvancesC. Health and Fitness答案:A2. 阅读理解。
(1)What does the author think about the new policy?答案:The author thinks the new policy is beneficial for the community.(2)What is the main idea of the passage?答案:The main idea is that teamwork is essential for success.四、综合试题及答案1. 政治题。
(1)解释“科学发展观”的含义。
答案:科学发展观是指坚持以人为本,全面、协调、可持续的发展观。
(2)我国的基本经济制度是什么?答案:我国的基本经济制度是以公有制为主体,多种所有制经济共同发展。
历年真题:陕西高考理科数学试题含答案(Word版)

陕西高考数学试题(理)一.选择题:本大题共10小题,每小题5分,共50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.1.已知集合2{|0},{|1,}M x x N x x x R =≥=<∈,则M N =( ).[0,1]A .[0,1)B .(0,1]C .(0,1)D 【答案】 B【解析】B N M N M 选,).1,0[),11-(),,0[=∩∴=+∞=2.函数()cos(2)6f x x π=-的最小正周期是( ).2A π .B π .2C π .4D π【答案】 B 【解析】B T 选∴,π2π2||π2===ω 3.定积分1(2)xx edx +⎰的值为( ).2Ae + .1B e + .C e .1De -【答案】 C 【解析】C e e e e x dx e x x x 选∴,-0-1|)()2(1001102∫=+=+=+4.根据右边框图,对大于2的整数N ,输出数列的通项公式是( ).2n A a n = .2(1)n B a n =- .2n n C a = 1.2n n D a -=【答案】 C 【解析】C q a a a a a n 选的等比数列是.2,2∴,8,4,21321=====5.已知底面边长为1则正四棱柱的各顶点均在同一个球面上,则该球的体积为( )32.3A π .4B π .2C π 4.3D π【答案】 D 【解析】D r r r r 选解得设球的半径为.π3434V ∴,1,4)2(11)2(,32222====++=π6.从正方形四个顶点及其中心这5个点中,任取2个点,则这2个点的距离不小于该正方形边长的概率为( )1.5A2.5B3.5C 4.5D 【答案】 C 【解析】C p 选反向解题.53C 4C 4-1.2525=== 7.下列函数中,满足“()()()f x y f x f y +=”的单调递增函数是( )(A )()12f x x =(B )()3f x x = (C )()12xf x ⎛⎫= ⎪⎝⎭(D )()3xf x =【答案】 D 【解析】D y f x f y x f D C y x y x y x 选而言,对不是递增函数只有.333)()(,3)(.++=•=•=+8.原命题为“若12,z z 互为共轭复数,则12z z =”,关于逆命题,否命题,逆否命题真假性的判断依次如下,正确的是( )(A )真,假,真 (B )假,假,真 (C )真,真,假 (D )假,假,假 【答案】 B 【解析】Bz z b a z b a z bi a z bi a z 选选择完成判断逆命题的真假即可逆否名称也为真,不需,原命题为真,则设,逆命题和否命题等价原命题和逆否名称等价.,||||∴,||||,-,.2122222111=+=+==+=设样本数据1210,,,x x x 的均值和方差分别为1和4,若i i y x a =+(a 为非零常数,1,2,,10i =),则12,10,y y y 的均值和方差分别为( )(A )1+,4a (B )1,4a a ++ (C )1,4 (D )1,4+a【答案】 A 【解析】A 选变均值也加此数,方差不样本数据加同一个数,.10.如图,某飞行器在4千米高空水平飞行,从距着陆点A 的水平距离10千米处下降, 已知下降飞行轨迹为某三次函数图像的一部分,则函数的解析式为( )(A )3131255y x x =- (B )3241255y x x =-(C )33125y x x =- (D )3311255y x x =-+【答案】 A【解析】AA f x f f x f A f x 选符合只有,,而言,对即为极值点且),三次奇函数过点..053-53)5(53-1253x )(2-3-1)5(∴x 53-x 1251)(.0)5(,5,2-5(),0,0(23==′=′====′= 第二部分(共100分)二、填空题:把答案填写在答题卡相应题号后的横线上(本大题共5小题,每小题5分,共25分).11.已知,lg ,24a x a==则x =________. 【答案】10【解析】.1010,21lg 12a ∴,lg ,224212aa========x a x a x 所以,12.若圆C 的半径为1,其圆心与点)0,1(关于直线x y =对称,则圆C 的标准方程为_______.【答案】11-(22=+)y x 【解析】.11-(1),1,0(∴)1,0()0,1(22=+=)的标准方程为半径为圆心为,的对称点关于点y x x y 设20πθ<<,向量()()sin 2cos cos 1a b θθθ==,,,,若b a //,则=θtan _______.【答案】 21【解析】.21t a n θθ,cos θcos θsin 2θcos θ2sin ∴//).1,θ(cos ),θcos ,θ2(sin 22=====解得即 14.猜想一般凸多面体中,E V F ,,所满足的等式是_________. 【答案】 2+=+E V F 【解析】.2+=+E V F 经观察规律,可得15.(考生注意:请在下列三题中任选一题作答,如果多做,则按所做的第一题评分).A (不等式选做题)设,,,a b m n R ∈,且225,5a b ma nb +=+=的最小值为.B (几何证明选做题)如图,ABC ∆中,6BC =,以BC 为直径的半圆分别交,AB AC于点,E F ,若2AC AE =,则EF =.C (坐标系与参数方程选做题)在极坐标系中,点(2,)6π到直线sin()16πρθ-=的距离是 【答案】 A 5 B 3 C 1【解析】A5.≤5)φθsin(∴5)φθsin(5os θ5θsin 5,os θ5,θsin 5∴,52222222222的最小值为所以,,则设n m n m n m n m c n m nb ma c b a b a ++=++=++=+=+===+B.3,2,6∴Δ=∴===ΔEF AE AC BC CBEFAC AE ACB AEF ,且相似与 C1|1323-3|023-1,3(∴,2-3121os θρ-23θsin ρ)6π-θsin(ρ,1,3()6π,2(=++==+==••=d y x x y c 的距离)到直线点即对应直线)对应直角坐标点极坐标点 三、解答题:解答应写出文字说明、证明过程或演算步骤(本大题共6小题,共75分) 16. (本小题满分12分)ABC ∆的内角C B A ,,所对的边分别为c b a ,,. (I )若c b a ,,成等差数列,证明:()C A C A +=+sin 2sin sin ; (II )若c b a ,,成等比数列,求B cos 的最小值. 【答案】 (1) 省略 (2)21【解析】(1)C)sin(A sinC sinA .∴C),sin(A sinB sinC.sinA 2sinB c,a b 2∴,,+=++=+=+= 即成等差,c b a(2).,21cosB 212ac ac -2ac 2ac b -2ac ≥2ac b -c a cosB ac.b ∴,,22222这时三角形为正三角形取最小值时,仅当又成等比,b c a c b a ====+==17. (本小题满分12分)四面体ABCD 及其三视图如图所示,过棱AB 的中点E 作平行于AD ,BC 的平面分 别交四面体的棱CA DC BD ,,于点H G F ,,.(I )证明:四边形EFGH 是矩形;(II )求直线AB 与平面EFGH 夹角 的正弦值.【答案】 (1) 省略 (2)510【解析】 (1).FG.⊥BCD ⊥,//∴,,AD//HG AD//EF,∴ADHG ADEF EFGH ⊂HG EF,EFGH,AD//HC AH EH//BC,∴EHBC EFGH,⊂EH EFGH,//B BCD⊥AD DC,⊥BD Δ,Δ为矩形所以,四边形,即面,且且共面和,面面同理且共面面面面且为等腰由题知,EHGF EF EF HG EF HG EF GC DG FB DF C RT BCD ====(2)510|,cos |sin 510252||||,cos ),0,1,1(0),,,()0,1-1(),2100(),1-20()0,0,1(),211,0(),0,1,0(),020(),100(,,,,(1)=><==<∴=======∴n AB n AB n FG n FE n z y x EHGF G E F B A z y x θ所以,,解得一个则法向量,设面,,,,,,,,,,轴建系,则为知,分别以由18.(本小题满分12分)在直角坐标系xOy 中,已知点)2,3(),3,2(),1,1(C B A ,点),(y x P 在ABC ∆三边围成的 区域(含边界)上(1)若=++,;(2)设),(R n m n m ∈+=,用y x ,表示n m -,并求n m -的最大值.【答案】 (1) 22 (2)m-n=y-x, 1【解析】 (1)22|OP |22|OP |,2,2,0-2-3-1,0-3-2-1(0,0))-2,-3()-3,-2()-1,-1(PC PB PA ∴),,(),2,3(),3,2(),11(22==+=∴===++=++∴=++=++所以,解得,y x y x y y y x x x y x y x y x y x P C B A (2)1---.1-)3,2(.,,-.--.2,2),1,2()2,1(y)x ,(∴,最大值为,所以,取最大值时,经计算在三个顶点求线性规划问题,可以代含边界内的最大值,属在三角形即求解得即n m x y n m x y B C B A ABC x y x y n m n m y n m x n m n m ==+=+=+=+= 19.(本小题满分12分)在一块耕地上种植一种作物,每季种植成本为1000元,此作物的市场价格和这块地上 的产量具有随机性,且互不影响,其具体情况如下表:(1)设X 表示在这块地上种植1季此作物的利润,求X 的分布列;(2)若在这块地上连续3季种植此作物,求这3季中至少有2季的利润不少于...2000元 的概率.【答案】 (1)(800,0.2)(2000,0.5)(4000,0.3) (2) 0.896【解析】 (1)3.06.0*5.0)4000(,5.04.0*5.06.0*5.0)2000(,2.04.0*5.0)800(.4000,2000,80040001000-10*50020001000-6*50020001000-10*3008001000-6*300.-*====+==========X p X p X p X X 三个,即,,,可以取考虑产量和价格,利润成本价格产量利润(2)896.020*******.08.02.0*8.0*3)-1()-1(200023.8.03.05.02000)1(8001000-6*300.-*32333223的概率是季的利润不少于季中至少有所以,的概率季的利润不少于季中至少有则的概率知,一季利润不少于由,可以取考虑产量和价格,利润成本价格产量利润=+=+==+===p p C p p C P p X X20.(本小题满分13分)如图,曲线C 由上半椭圆22122:1(0,0)y x C a b y a b+=>>≥和部分抛物线22:1(0)C y x y =-+≤连接而成,12,C C 的公共点为,A B,其中1C 的离心率为2. (1)求,a b 的值;(2)过点B 的直线l 与12,C C 分别交于,P Q (均异于点,A B ),若AP AQ ⊥,求直线l的方程.【答案】 (1) a=2,b=1 (2) )1-(38-x y =【解析】 (1)14,3,1,2∴,23.1∴)0,1(),0,1-(1-2222222=+===+===+=x yc b a c b a a c b x y 椭圆方程为联立解得又,交于点抛物线 (2))1-(38-.38-,0)2(4-)2,1)(4-,(,0)2k -k - -k,()4k8- 1,44-(,0∴⊥),0,1-()2k --k ,1--k (,2k --k )1-(,1--k 0,1-k -:1-)4k8-,44-(,4k 8-)1-(,44-04-2-)4(,44)12x -(14),,(),,(),1-()0,1(222222222222222112212222222222211x y k k k k k k k k A Q x k y x kx x x y k k k P k x k y k k x k x k x k x x k x y y x Q y x P x k y B ===+=+=•+++=•====++=+++==+==++=++=+=所以,所求直线方程为解得即即即由韦达定理得联立得与即由韦达定理得,即联立得与的直线方程为设过21.(本小题满分14分) 设函数()ln(1),()'(),0f x x g x xf x x =+=≥,其中'()f x 是()f x 的导函数.(1)11()(),()(()),n n g x g x g x g g x n N ++==∈,求()n g x 的表达式;(2)若()()f x ag x ≥恒成立,求实数a 的取值范围;(3)设n N +∈,比较(1)(2)()g g g n +++与()n f n -的大小,并加以证明.【答案】 (1) nx x x g n +=1)((2),1](-∞ (3) 前式 > 后式【解析】 (1)+++++=++=+=++=+++=+==+=+++=+===+=+=′′=+=N n nx xx g xk xx g k n x k x kxx kx xx g kx x x g k n x xxx x xx g x x x g x g g x g x g x g xx x g x x f x x f x x g x x f n k k k n n ∈,1)(,.)1(1)(1∴)1(1111)(.1)(1≥21111)(1)(∴))(()()()(1)(,11)(∴,0≥),()(),1ln()(112111综上也成立时,当则时,假设当,,, (2),1](-a 1.a 0.≥-1),0[∈∃0≥(x)h ,0),,0[∈∃∴0≥0≥h(x),0h(0))1(-1)1()-1(-11(x)h ,0.≥,1-)1ln(h(x)0.≥,≥1-)1ln(∴1)(),(≥)(22∞∈≤+′>=++=+++=′++=+++=所以,解得,即使上恒成立在则令a x t x t t x x x ax x x x a x x x ax x x x axx x x x g x ag x f(3)+∈>++++>>++∴>∈++=+++++++++=+++++••••=++++=+++++=+=+=N n f(n)-n )()3()2()1(0)(,011-n 1n ln .0)()2(],1,0,1 -)1ln()((a) )11-n 1n (ln )311-34(ln )211-23(ln )111-12(ln 11--311-211-111-n 1n 342312ln 11--311-211-111-f(n)f(n)]-[n -)()3()2()1(∴11-11)(∴,1)(,所以,恒成立式恒成立恒成立知,则由(令)(n g g g g a nx h x xxx x h nnnn g g g g nn n n g x x x g。
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2009年普通高校招生统一考试陕西卷(英语)英语知识应用(共三大题,满分50分)语音知识(共5小题,每小题1分,满分5分)从每小题的A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,并在答题卡上将该选项涂黑。
1.permitA.first B.behind C.island D. smile2.questionA.revolution B.exhibition C.suggestion D.education3.emptyA.toilet B.dozen C.general D.connect4.socialA.precious B.certain C.discovery D.Decision5.forgetA.ordinary B.major C.world D.Report(二)语法和词汇知识(共15小题,每小题1分,满分15分)从每小题的A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该选项涂黑。
6.What____ pity that you couldn’t be there to receive____ prize!A.a;a B.the;a C.a;the D.the;the7.Dr.Smith, together with his wife and daughters, ______visit Beijing this summer.A.is gong to B.are going to C.was going to D.were going to8.He invited me to a dance after the show____ Christmas Eve.A.at B.on C.in D.by9.This is the first time we______ a film in the cinema together as a family.A.see B.had seen C.saw D.have seen10.Jane was asked a lot of questions, but she didn’t answer_____ of them.A.other B.any C.none D.some11.Gun control is a subject ____ Americans have argued for a long time.A.of which B.with which C.about which D.into which12.I still remember _______to the Famen Temple and what I saw there.A.to take B.to be taken C.taking D.being taken13.My parents don’t mind what job I do _________ I am happy.A.even though B.as soon as C.as long as D.as though14.--My mother is preparing my favorite dishes, Go with me and have a taste, okay?--_______. And I’ll be glad to meet your parents.A.I think so B.I’d love to C.I’m sure D.I hope so15.A notice was _____in order to remind the students of the changed lecture time.A.sent up B.given up C.set up D.put up16.He must be helping the old man to water the flowers,_______?A.is he B.isn’t he C.must he D.mustn’t he17.The bow-to book can be of help to _______ wants to do the job.A.who B.whomever C.no matter who D.whoever18.Little _______ about her own safety, though she was in great danger herself.A.did Rose care B.Rose did care C.Rose does care D.does Rose care 19.--Have you finished your first paper?--_______, Just half of it, how about you?A.Not at all B.Not likely C.Not a bit D.Not yet20.From their _____on the top of the TV Tower, visitors can have a better view of the city.A.stage B.position C.condition D.situation(三)完形填空(共20小题,每小题1.5分,满分30分)阅读下面短文,从短文后各题的A、B、C、D四个选项中,选取出适合填入空白处的最佳选项,并在答题卡上将该选项涂黑。
One afternoon,my son Adam asked me,“Are all people the same even if they are different in color?”I thought for a minute,and then I said,“I’ll explain, _21_ you can just wait until we make a quick 22 at the grocery store. I have something 23 to show you."At the grocery store,we 24 some apples—red,green and yellow ones.Back home.I told Adam,"It’s time to 25 your question.”I put one apple of each 26 on the table.Then I looked at Adam, who had a 27 look on his face.“People are like apples.They come in all 28 colors,shapes and sizes.On the 29 ,some of the apples may not 30 look as delicious as the others.”As I was talking, Adam was 31 each one carefully.Then, I took each of the apples and peeled(削皮)them, 32 them back on the table, but 33 a different place.“okay, Adam, tell me which is which.”He said, “I 34 tell. They all look the same now.” “Take a bit e of 35 . See if that helps you 36 which one is which.”He took 37 , and then a huge smile came across his face. “People are 38 like apples! They are all different, but once you 39 the outside, they’re pretty much the same on the inside.”He totally 40 it. I didn’t need to say or do anything else.21.A.although B.so C.because D.if22.A.stop B.start C.turn D.stay 23.A.expressive B.encouraging C.informative D.interesting 24.A.bought B.counted C.saw D.collected25.A.check B.mention C.answer D.improve26.A.size B.type C.shape D.class27.A.worried B.satisfied C.proud D.curious28.A.ordinary B.normal C.different D.regular29.A.outside B.whole C.table D.inside30.A.still B.even C.only D.ever31.A.examining B.measuring C.drawing D.packing32.A.keeping B.placing C.pulling D.giving33.A.on B.toward C.for D.in34.A.mustn’t B.can’t C.shouldn’t D.needn’t35.A.each one B.each other C.the other D.one other36.A.admit B.consider C.decide D.believe37.A.big bites B.deep breaths C.a firm hold D.a close look38.A.just B.always C.merely D.seldom39.A.put away B.get down C.hand out D.take off40.A.made B.took C.got D.did二、阅读理解(共25小题,阅读部分每小题2分,补全对话每小题1分,满分45分)(一)阅读下列五篇短文,从每小题后所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该选项涂黑。
AIt was the first snow of winter – an exciting day for every child but not for most teachers. Up until now, I had been old enough to dress myself, but today I would need some help. Miss Finlayson, my kindergarten teacher, had been through first snow days many times, but I think she may still remember this one.I managed to get into my wool snow trousers. But I Struggled with my jacket because it didn’t fit well. It was a hand-me-down from my brother, and it made me wonder why I had to wear his ugly clothes. At least my hat and scarf were mine, and they were quite pretty. Finally it was time to have Miss Finlayson help me with my boots(靴子).In her calm, motherly voice she said, “By the end of winter, you wi ll all be able to put on your own boots.” I didn’t realize at the time that this was more a statement of hope than of confidence(信心).I handed her my boots and stuck out my foot. Like most children, I expected grown-ups to do all the work. After much pushing, she managed to get the first one into place and then, with a sigh, worked the second one on too.I announced, “They’re on the wrong feet.”She struggled to get the boots off and went through the joyless task of putting them on again.“They’re my brother’s boots, you know,” I said. “I hate them!”Somehow, from long years of practice, she managed to act as though I wasn’t an annoying (烦人的)little girl, She pushed and pushed, less gently this time. With a greater sigh, seeing the end of her struggle with me, she asked, “Now, where are your mittens(连指手套)?”I looked into her eyes and said, “I didn’t want to lose them, so I hid them in the toes of my boots.”41.The little girl was more satisfied with her__________.A.trousers B.jacket C.boots D.hat42.Miss Finlayson had difficulty with the girl’s boots mainly because_____.A.the girl got them from her brother B.the girl put something in themC.they were on the wrong feet D.they did not fit the girl well43.Why does the author say Miss Finlayson would remember that first snow day?A.Because the little girl was in her brother’s clothes.B.Because it was the most exciting day of the winter.C.Because the little girl played a trick on her.D.Because the little girl wore a pretty scarf.44.We can learn from the text that Miss Finlayson_________.A.was losing confidence in the little girlB.gradually lost patience with the little girlC.because disappointed with the little girlD.was getting bored with the little girlBWhen people hear a president speak, they seldom think about others helping to shape the presentation(报告). Today, however, presidents depend on writers such as J. Terry Edmonds to help them communicate(交流)effectively. Edmonds is the first African American ever to work as a full-time speechwriter for a U.S. president; he is also the first African American to serve as director of speechwriting for the White House. His is an all-American story of success.Edmonds grew up in Baltimore, Maryland; his father drove a truck, and his mother worked as a waitress. A great reader, Edmonds showed a gift for writing at his high School, Baltimore City College. After graduating in 1967, Edmonds went on to Morgan State University.Edmonds began his career in business, with jobs in public relations and communications, He joined the world of politics as news secretary for his congressman (国会议员) from Baltimore, During Bill Clinton’s presidency, he worked speeches for Health and Human Ser vices Secretary Donna Shalala and worked in a number of jobs in the White House and in governmental departments. President Clinton then appointed (任命) him to the office of director of speechwriting, Following the 2000 elections, Edmonds returned to Morgan State University as the school’s special assistant to the president for 2001-2002.45. Which of the following statements is TRUE according to the text?A. Edmonds proved himself to be good at writing at high school.B. Edmonds graduated from Morgan State University in 1967.C. Edmonds was the first full-time speechwriter.D. Edmonds served the White House after 2000.46. Edmonds entered the world of politics first asA. news secretary for a congressmanB. a speechwriter for President ClintonC. news secretary in the White HouseD. a speechwriter for Secretary Donna Shalala47. The text is most likely to be found in a book aboutA. popular scienceB. historical eventsC. successful peopleD. political systemsC“Old wives tales” are beliefs passed down from one generation to another, For Example, most of us remember our parents’ telling us to eat more of certain foods or not to do certain things. Is there any truth in these teachings? Some of them agree with present medical thinking, but others have not passed the test of time.Did your mother ever tell you to eat your carrots because they are good for your eyes? Scientists now report that eating carrots can help prevent a serious eye disease called macular degeneration. Eating just one carrot a day can reduce the possibility of getting this disease by 40%. Garlic (蒜) is good for you, too. It can kill the type of virus that causes colds.Unfortunately, not all of Mom’ s advice passed the test of medical studies, For example,generations of children have been told not to go swimming within an hour after eating. But research suggests that there is no danger in doing so. Do sweets cause tooth problems? Well, yes and no. Sticky sweets made with grains tend to cause more problems than sweets made with simple sugars.Even though science can tell us that some of our traditional beliefs don’t hold water, there is still a lot of truth in the old wives’ tales. After all, much of this knowledge has been accumulated (积累) from thousands of years of experience in family health care. We should respect this body of knowledge even as we search for clear scientific support to prove it true or false.48. Which of the following is TRUE according to the test?A. Eating garlic is good for our eyes.B. Sticky sweets are damaging to our teeth.C. Swimming after a meal is dangerous.D. Carrots prevent people from catching colds.49. The author develops the third paragraph mainly .A. by cause and effectB. by order in spaceC. by order in timeD. by examples50. The phrase “hold water” in the last paragraph most probably means”_____”.A. to be believableB. to be valuableC. to be admirableD. to be suitable51.What is the author’s attitude toward “old wives tales” in the text?A. SubjectiveB. ObjectiveC. DissatisfiedD. CuriousDBrian arrived at the San Francisco airport two hours before the flight to Paris. He was wearing three shirts, a jacket, two pairs of socks, a pair of shorts, and two pairs of jeans. He was carrying one small backpack, which was very full, but he didn’t have any other luggage. Brian needed to meet a man named Tony before he checked in for his flight. He found Tony near the Air France counter. Tony gave him a round-trip ticket and a small package.“Give this package to Jean-Paul at the airport in Paris. He will have a sign with your name on it. I think you can find him easily ,” Tony said, ”You don’t have any luggage, right?”“Only this backpack,” Brian answered. ”You said I could bring one carry-on bag.”“That’s right. One carry-on bag is fine. Have a good trip.”“Thanks.”Is Brian a criminal(罪犯)? Not at all. He is an air-courier. And he paid only $110 for the round-trip ticket to Paris. Air couriers get cheap airline tickets because they take important packages and papers to foreign countries. Businesses sometimes need to get packages and papers to people in foreign countries by the next day. Often, the only way they can do this is to use an air-courier company. It is not cheap for a business to send a package with an air courier, but it is quick.Every year about 80,000 people worldwide travel as air couriers. The number of tickets for courier travel is growing by about 10 percent a year. However, air-courier travel isn’t for everyone. But if you have very little money, can be flexible(灵活的) about your travel plans, and don’t mind wearing the same clothes for a week, it can be a great way to take a vacation!52.Why was Brian wearing so many clothes for his travel?A. Because they were the uniforms for air couriers.B. Because that made him easier to be recognized.C. Because his backpack had no room his clothes.D. Because he did not have any luggage with him53. An air courier is a person who_________A .manages a business company in foreign countriesB. organizes international flights for touristsC. travels around the world with cheap ticketsD delivers papers and packages to foreign countries.54. Business choose the air-courier service because_____.A. it costs lessB. it is flexibleC. it saves timeD. it grows fast55. One of the disadvantages of traveling as an air courier is that he_____.A. cannot decide when and where to travelB. cannot take any luggage with himC. has to wear two pairs of jeansD .saves little money from the travel56. The author of the text mainly______.A. describes the activities of a law-breakerB. suggests an ideal way to travelC. argues against the air-courier travelD. tells us about a developing businessESuccessful people in international business understand the cultures of other countries and learn to change their practices in different cultures. They understand the importance of avoiding business decisions based on misconceptions-mistaken ideas.One cause of misconceptions is ethnocentrism, the belief that one’s own culture’s way of doing things is better than the way of other cultures. It’s ethnocentrism that leads to failure in international business. To avoid ethnocentris m, it’s necessary to study the different elements(组成部分) of culture: language, values and attitudes ,and customs and manners.LanguageA knowledge of the local language can help international business people in four ways. First, people can communicates directly. Second, people are usually more open in their communication With someone who speaks their language. Third, an understanding of the language allows people to infer meanings that are not said directly. Finally, knowing the language helps people to understand the culture better.Values and AttitudesValues are people’s basic beliefs about the difference between right and wrong, good and bad. An attitude is way of thinking or acting. Values and attitudes influence international business. For Example, many people in the United States believe that chocolate from Switzerland is better than chocolate from other countries, and they buy a lot of it.Customs and MannersCustoms are common social practices. Manners are ways of acting that the society believes are polite. For example, in the United States, it is custom to have salad(色拉) before the main course at dinner, not after. It’s not acceptable to talk with food in mouth at table. Failure tounderstand the customs and manners of other countries will bring difficulty selling their products. Orange juice as a breakfast drink of an American company in France doesn’t sell well because the French don’t usually drink juice with breakfast.57. A knowledge of the local language allows international business people __________.A. to be more open with their customersB. to communicate without outside helpC. to express their thoughts indirectlyD. to have a better idea of their own culture58. The act of many people buying chocolate of Switzerland shows the role of __________.A. mannersB. valuesC. attitudesD. customs59. What would be the best title for the text?A. Misconceptions in BusinessB. Basic Beliefs in BusinessC. International Business CultureD. Successful International Business60. The author’s purpose of writing this article is to tell people _________.A. how to take a right attitude in businessB. how to avoid misunderstandings in businessC. how to use a local language in businessD. how to act politely and properly in business(二)根据对话情景内容,从对话后所给的选项中选出能填入每一空白处的最佳选项。