2009年重庆普通专升本单项选择2
2009年普通高等学校招生全国统一考试(重庆卷)

2009年普通高等学校招生全国统一考试(重庆卷)文科综合能力测试试题卷(地理部分)第一部分(选择题)图1为地球公转轨道示意图,读图回答1-2题.1.地球从甲运行到乙期间,重庆的正午太阳高度A.逐渐减小B.逐渐增大C.先减小后增太 D先增大后减小2.当地球在甲位置时A.黄河流域进入汛期 B南极昆仑站正值极夜C.三峡水库处于蓄清期D.潘帕斯草原处于枯黄期读图2,回答3—5题。
3下列地区气候类型与甲地相同的是A.德干高原 B.巴西高原 C.黄土高原 D.伊朗高原4.乙地气候类型区的地带性土壤是A.棕壤 B黑土 C.黄壤 D一红壤5甲、乙两地可能种植的主要经济作物分别是A,咖啡、甜菜 B.花生、咖啡C.甜菜、亚麻 D.亚麻、花生图3中,甲、乙两处景观所在地是我国著名旅游胜地。
读图回答6~7题。
6、游客在甲景观地可普遍观赏到A、奇松、云海B、石林、石牙 C.椰林孤峰 D、森林、冰川7、两地地貌形成主导外力作用与岩石组合正确的是A.甲——物理风化——风力侵蚀——砂岩B.乙——物理风化——风力侵蚀——砂岩C.甲——化学风化——流水侵蚀——石灰岩D.乙——化学风化——流水侵蚀——石灰岩图4是某城镇用地布局规划方案示意图。
读图回答8—9题。
8.该方案突出优点是规划中的A.居住区紧靠旧城、临近铁路B居住区环境好、建筑工程量小C.工业区靠近水源、铁路交通方便D.工业区地势平坦、位于主导风下风向9.适台布局在防护带的是A.停车场、日用品仓库B.幼儿园、日用品仓库C.幼儿园、医院D.医院、停车场图5是我国某盆地的局部地形剖面示意图。
读图回答l0—11题。
10.最适合形成天然绿洲的地带是A.①B.②C.③D.④11.该区域河流水文特征是A.夏季流量小B.补给以降水为主C.水量向下游增大D.径流年际变化小第二部分(综合题)36.(36)图6、图7是是两国跨流域调水工程局部示意图,图7中饼图是C城市的工业结构图。
A、B是两个水资源调入区代表性城市。
2009年 重庆理)全解全析版

2009年普通高等学校招生全国统一考试(重庆卷)数学试题卷(理工农医类)本试卷满分150分,考试时间120分钟第Ⅰ卷考生注意: 1.答题前,务必将自己的姓名、准考证号、填写清楚 ,并贴好条形码.请认真核准条形码上的准考证号、姓名和科目.2.每小题选出答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其他答案标号.在试题卷上作答无效.3.本卷共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.4.所有题目必须在答题卡上作答,在试题卷上答题无效. 5.考试结束后,将试题卷和答题卡一并交回. 参考公式: 如果事件A B ,互斥,那么 ()()()P A B P A P B +=+如果事件A B ,相互独立,那么 ()()()P A B P A P B =如果事件A 在一次试验中发生的概率是P ,那么n 次独立重复试验中恰好发生k 次的概率()(1)(01,2)k kn k n n P k C P P k n -=-=,,,以R 为半径的球体积:34π3V R =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备选项中,只有一项是符合题目要求的。
1.直线1y x =+与圆221x y +=的位置关系为( ) A .相切 B .相交但直线不过圆心 C .直线过圆心D .相离【答案】B【解析】圆心(0,0)为到直线1y x =+,即10x y -+=的距离2d ==,而012<<,选B 。
2.已知复数z 的实部为1-,虚部为2,则5iz=( ) A .2i - B .2i + C .2i -- D .2i -+【答案】A【解析】因为由条件知12z i =-+,则55(12)5102(12)(12)5i i i i i z i i ---+===--+--,所以选A 。
3.282()x x+的展开式中4x 的系数是( ) A .16B .70C .560D .1120【答案】【解析】设含4x 的为第2616316621,()()2rrr r r rr r T C x C xx--++==,1634r -= 所以4r =,故系数为:44621120C =,选D 。
重庆市普通高校专升本大学计算机真题2009年

重庆市普通高校专升本大学计算机真题2009年(总分:120.00,做题时间:120分钟)一、单项选择(每小题1分,共40分。
在每小题的四个备选答案中选出一个正确答案,将其在机读卡上涂黑,不选、多选或错选者,该题无分)(总题数:40,分数:40.00)1.微型计算机中的辅助存储器,可以与下列()部件直接进行数据传送?(分数:1.00)A.运算器B.内存储器√C.控制器D.微处理器解析:2.微型计算机中使用的人事档案管理系统,属下列计算机应用中的()。
(分数:1.00)A.人工智能B.专家系统C.信息管理√D.科学计算解析:3.在计算机网络中,表征数据传输可靠性的指标是()。
(分数:1.00)A.误码率√B.频带利用率C.信道容量D.传输速率解析:4.在计算机网络中,表征数据传输有效性的指标是()。
(分数:1.00)A.误码率B.频带利用率C.信道容量D.传输速率√解析:5.下列四条叙述中,有错误的一条是()。
(分数:1.00)A.两个或两个以上的系统交换信息的能力称为兼容性B.当软件所处环境(硬件/支持软件)发生变化时,这个软件还能发挥原有的功能,则称该软件为兼容软件C.不需调整或仅需少量调整即可用于多种系统的硬件部件,称为兼容硬件D.著名计算机厂家生产的计算机称为兼容机√解析:6.为了指导计算机网络的互联、互通和互作,ISO颁布了OSI参考模型,其基本结构分为()。
(分数:1.00)A.6层B.5层C.7层√D.4层解析:7.下列字符中,ASCII码最小的是()。
(分数:1.00)A.KB.aC.hD.H √解析:8.和通信网络相比,计算机网络最本质的功能是()。
(分数:1.00)A.数据通信B.资源共享√C.提高计算机的可靠性和可用性D.分布式处理解析:9.调制解调器(Modem)的功能是实现()。
(分数:1.00)A.模拟信号与数字信号的转换√B.数字信号的编码C.模拟信号的放大D.数字信号的整形解析:10.局域网组网完成后,决定网络使用性能的关键是()。
重庆普通高校专升本 财务管理学 复习资料

财务管理复习题一、单项选择题1.企业价值最大化目标强调的是企业【 】A .实际利润额B .实际利润率C .生产能力D .预期获利能力答案:D2.某公司从本年度起每年年末存入银行一笔固定金额的款项,若按复利用最简便算法计算第n 年末可以从银行取出的本利和,则应选用的时间价值系数是【 】A .复利终值系数B .普通年金终值系数C .复利现值系数D .普通年金现值系数 答案:B3.某人目前向银行存入1000元,银行存款年利率为2%,在复利计息的方式下,5年后此人可以从银行取出的金额为【 】 A .1140.1元 B .1100元C .1204元D .1106.1元答案:A 参考答案1000×5)2%(14.某种股票的期望收益率为10%,其标准离差为0.04,风险价值系数为30%,则该股票的风险收益率为【 】A .12%B .40%C .6%D .3%答案:A 标准离差率=标准离差/期望值=0.04/10%=0.4 风险收益率=风险价值系数×标准离差率=0.4×30%=12%5.与其他负债资金筹集方式相比,下列各项属于融资租赁缺点的是【 】A .财务风险大B .资本成本较高C .税收负担重D .筹资速度慢答案:B6.某企业2008年的销售额为1000万元,变动成本600万元,固定经营成本200万元,预计2009年固定成本不变,则2009年的经营杠杆系数为【 】A .5B .3C .4D .2答案:D 参考答案2009年经营杠杆系数=(1000-600)/(1000-600-200-10)=27.下列各项中,运用普通股每股收益无差别点确定最优资本结构时,需计算的指标是 【 】A .利润总额B .营业利润C .净利润D .息税前利润答案:D8.根据财务报表等有关资料、运用特定的方法,对企业财务活动过程及其结果进行分析和评价的工作是指【 】A .财务控制B .财务分析C .财务预测D .财务决策答案:B9.企业有一笔五年后到期的贷款,到期值是15000元,假设贷款年利率为3%,则企业为偿还借款建立的偿债基金为【】A.3275.32元B.2825.34元C.3225.23元D.2845.34元答案:B 参考答案:建立的偿债基金=15000/(F/A,3%,5)=2825.34元10.普通股和优先股筹资方式共有的缺点包括【】A.财务风险大B.容易分散控制权C.筹资成本高D.筹资限制多答案:C11.下列各项中不属于利用商业信用筹资形式的是【】A.赊购商品B.短期借款C.预收货款D.商业汇票答案:B12.下列各项中属于效率比率的是【】A.成本利润率B.速动比率C.资产负债率D.流动资产占总资产的比率答案:A13.目前企业的流动比率为120%,假设此时企业赊购一批材料,则企业的流动比率将会【】A.提高B.不变C.降低D.不能确定答案:C14.下列各项中,能够用于协调企业所有者与企业债权人矛盾的方法是【】A.停止借款B.解聘C.接收D.激励答案:A15.根据财务管理理论,按照企业所筹资金使用期限的长短,可将筹资分为【】A.短期筹资和长期筹资B.内源筹资和外源筹资C.权益筹资和负债筹资D直接筹资和间接筹资.答案:A16.企业资产负债率的计算方法为【】A.流动资产/流动负债B.负债总额/资产总额C.速动资产/流动负债D.负债总额/所有者权益答案:B17.企业中必须对其投资的安全性首先予以关注的是【】A.所有者B.国家C.经营者D.债权人答案:D18.产权比率与权益乘数的关系是【】A.产权比率×权益乘数=1 B.权益乘数=1+产权比率C.权益乘数=(1+产权比率)/产权比率D.权益乘数=1/(1—产权比率)答案:B19.如果企业的经营杠杆系数为3,固定成本为50000元,利息费用为20000元,则企业已获利息倍数为【】A.1.2 B.1.3C.1.5 D.1.25答案:D 参考答案:经营杠杆系数=(EBIT+固定成本)/EBIT=3,EBIT=2.5万元,所以,已获利息倍数=EBIT/I=2.5/2=1.25二、名词解释题20.因素分析法答案:因素分析法:是根据依据分析指标与其影响因素的关系,从数量上确定各因素对分析指标影响方向和影响程度的一种方法。
重庆专升本试题及答案

重庆专升本试题及答案一、单项选择题(每题2分,共20分)1. 重庆是中国的直辖市之一,其简称是?A. 渝B. 川C. 陕D. 黔答案:A2. 重庆的著名景点“解放碑”位于哪个区?A. 渝北区B. 江北区C. 渝中区D. 南岸区答案:C3. 重庆的气候类型是?A. 亚热带季风气候B. 热带雨林气候C. 温带大陆性气候D. 高原山地气候答案:A4. 重庆的市花是什么?A. 牡丹B. 玫瑰C. 桂花D. 杜鹃答案:C5. 重庆的市树是?A. 松树B. 柳树C. 黄葛树D. 樟树答案:C6. 重庆的长江大桥是连接哪两个区的?A. 渝中区和江北区B. 南岸区和渝北区C. 沙坪坝区和九龙坡区D. 渝中区和南岸区答案:A7. 重庆的轨道交通系统简称是什么?A. 地铁B. 轻轨C. 地铁轻轨D. 地铁快线答案:B8. 重庆的著名小吃“重庆小面”的主要调料是什么?A. 辣椒B. 花椒C. 大蒜D. 姜答案:A9. 重庆的著名历史人物“刘伯承”是?A. 政治家B. 军事家C. 教育家D. 文学家答案:B10. 重庆的著名地标“洪崖洞”位于?A. 渝中区B. 江北区C. 南岸区D. 九龙坡区答案:A二、多项选择题(每题3分,共15分)1. 以下哪些是重庆的著名景点?A. 磁器口古镇B. 武隆天生三桥C. 长江三峡D. 黄鹤楼答案:A、B、C2. 重庆的特产包括哪些?A. 重庆火锅B. 重庆小面C. 重庆酸辣粉D. 重庆毛血旺答案:A、B、C、D3. 以下哪些是重庆的气候特点?A. 湿润B. 炎热C. 寒冷D. 多雾答案:A、B、D三、填空题(每题2分,共10分)1. 重庆的市树是______。
答案:黄葛树2. 重庆的市花是______。
答案:桂花3. 重庆的简称是______。
答案:渝4. 重庆的轨道交通系统简称是______。
答案:轻轨5. 重庆的著名小吃“重庆小面”的主要调料是______。
答案:辣椒四、简答题(每题5分,共20分)1. 简述重庆的地理位置。
2009年专升本英语考试真题及参考答案

2009年专升本英语考试真题及参考答案一、Phonetics (5 points)?Directions: In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and pare the underlined parts and identify the one that is different from the others in pronunciation.Mark your answer by blackening the corresponding letter on ANSWER SHEET Ⅰ.第1题单选选出下面读音不同的选项()。
A.quietB.societyC.yieldD.diet【参考答案】C第2题单选选出下面读音不同的选项()。
A.fourteenB.sourceC.yoursD.tournament【参考答案】D第3题单选选出下面读音不同的选项()。
A.customerB.cushionC.cultureD.currency【参考答案】B第4题单选选出下面读音不同的选项()。
A.chessB.characterC.chorusD.chemist【参考答案】A第5题单选选出下面读音不同的选项()。
A.hurryB.implyC.identifyD.occupy【参考答案】A二、Vocabulary and Structure (15 points)?Directions: There are 15 incomplete sentences in this section.For each sentence there are four choices marked A, B, C and D.Choose one answer that best completes the sentence and blacken the corresponding letter on ANSWER SHEET Ⅰ.第6题单选We travelled on the 6:45 a.m.train to Boston,________arrived at 8:30 p.m.A.thatB.whichC.itD.what【参考答案】B【参考解析】【翻译】我们乘坐早晨6点45分的火车去波士顿,8点30分到达。
2009年重庆普通专升本《大学英语》语法与词汇复习题一

2009年重庆普通专升本《大学英语》语法与词汇复习题一第一篇:2009年重庆普通专升本《大学英语》语法与词汇复习题一2009年重庆普通专升本《大学英语》语法与词汇复习题(一)1.He offered to _____ her a hand as the suitcase was too heavy for her to carry.A.borrow B.help C.lend D.show2.The textbook is for the _______ students, not for the beginners.A.foreign B.blind C.advanced D.deaf3.A sudden idea _____ to him that he might try the new method.A.occurredB.happenedC.took placeD.took part 4.We tried to _____ what he meant.A.make forB.make outC.make ofD.make from 5.Although the weather was very bad, the buses still ran on _____.A.time B.plan C.schedule D.arrangement 6.I should like to _____ touch with old friends but I have so little time.A.get intoB.be inC.keep inD.lose 7.Though he was born and brought up in America, he can speak _____ Chinese.A.smooth B.fluent C.slide D.flowing 8.As it _____, the elderly lady she quarreled with was none other than her future mother-in-law.A.turned out B.turned down C.turned up D.t urned on 9.Don’t drop your cigarette butts on the floor.You could _____ fire to the house.A.causeB.makeC.setD.start 10.The _____ from the forest fire could be seen ten miles away.A.smellB.sparkC.steamD.smoke11.Whenever anything ______ happens, a crowd of people is certain to gather.A.emotional B.sensational C.famous D.helpful12.Jack is the _____ holder of the world 5000-meter raceworld record, but there is no guarantee that he will win the first place in the coming Olympic Games.A.dominant B.prominentC.goodD.current13.“Here is the money I promised,” he said.“I always _____ promises.” A.agreeB.followC.makeD.keep14.It was a minor illness, and she soon _____ it.A.got overB.got on withC.got aroundD.got out15.The car was repaired but not quite to the owner's _____.A.satisfaction B.surprise C.joyD.pleasure16.This is the military ______ , and nobody is allowed to get in without permission.A.bond B.zone C.uniform D.zoo17.If you don't think it necessary to make _____ any missed lessons, speak up now.A.up for B.up with C.up to D.away for18.If you want to see the chairman of the department, you’d better make an ______ with him first.A.admission B.agreementC.appointmentD.argument19.It is highly desirable that a new president _____ to this university.A.appointed B.be appointed C.was appointedD.has been appointed20.A meeting of the society will be _____ at six o'clock on Tuesday evening.A.placed B.takenC.madeD.held21.In ______ recent years, Niagara Falls have come to be appreciated more for their natural beauty as _______ wonder ofnature.A.the;a B.the;the C./;the D./;a22.________ such circumstances, one can only fight back.A.Below B.Within C.Over D.Under23.By the end of next month he ________ everything in school.A.will finishB.would finishedC.finishesD.will have finished 24.I heard that he _________ great progress in his research since we last parted.A.had made B.madeC.has madeD.makes25.Why do you worry so much _______ your health? I think you are all right.A.for B.about C.at D.on26.I need one more stamp before my collection ________.A.is completed pletedC.has been completedD.has completed27.Dave ________ into the house without ________ out by his parents.A.slipped;finding B.slips;findingC.slips;to be foundD.slipped;being found28.What is the reason for _______ on time? A.not your comingB.you not comeC.your not comingD.you not to come29.Our English teacher demanded that we _______ to English broadcast every day.A.listening B.would listen C.listenD.could listen30.Was it until the1990s _______ the old man finally got a house of his own? A.when B.that C.which D.how31.Sally has failed again.I think she _____ harder.A.ought have studied B.ought to have studied C.must have studied D.may have studied 32.” I don’t drink coffee at all.“ “ __________.” A.So don’t I B.I do either C.Nor I do D.Neither do I33.It’s not my fault.I have ______ the matter.A.nothing to do with B.something to do with C.anything to do with D.everythingto do with34.Michael used to look hurt and surprised when _________.A.criticizing B.to criticize C.having criticized D.criticized35.We started out early in order that we _________ there in time.A.would get B.ought get C.should get D.had to get 参考答案:1.C2.C3.A4.B5.A6.C7.B8.A9.C 10.D11.B 12.D 13.D 14.A 15.A 16.B 17.A 18.C 19.B 20.D 21.D 22.D 23.D 24.A 25.B 26.A 27.D 28.C 29.C 30.B 31.B 32.D 33.A 34.D 35.A 第二篇:专升本大学英语语法复习计划专升本大学英语语法复习计划英语语法内容分成以下几块:1.名词和主谓一致复习名词的种类和名词的数、名词的所有格,包括做相关的习题并整理好错题集。
重庆专升本计算机历年真题及答案

2008年重庆市专升本计算机题目一、单向选择题1、标志着Internet诞生的网际互联的网络是()。
A ARPA网B MILNetC DARPAD NSFNet2、使用LSI和VLSI的电子计算机被称为()电子计算机。
A第一代B第二代C第三代D第四代3、计算机硬件系统由五大部件组成,它们是()。
ACPU、运算器、存储器、输入输出设备BCPU、控制器、存储器、输入输出设备CCPU、控制器、主存储器、输入输出设备D控制器、运算器、主存储器、输入设备和输出设备4、下列关于“计算机采用二进制码的原因”的说法中,不正确的说法是()。
A二进制码便于实现逻辑运算B二进制码在物理上最容易实现C人们习惯使用通过二进制码表示二进制数D二进制码用来表示二进制数,其计数和加减运算的规则都很简单5、目前的计算机仍采用“存储程序”原理,该原理是由()提出的。
A美国人西蒙·克雷B美国人普雷斯伯·埃克特C美籍匈牙利人冯·诺依曼 D美国宾夕法尼亚大学约翰·莫克斯6、目前,我国的汉字信息系统一般都采用与ASCII码相容的8位编码方案,用()个8位码字符构成一个汉字内部码。
A1 B2 C4 D87、完整的计算机系统包括()。
ACPU和存储器 B主机和使用程序 C主机和外部设备 D硬件系统和软件系统8、电子计算机ENIAC诞生于()。
A1946年2月 B1946年6月 C1949年2月 D1949年5月9、在微型计算机中,能实现算术运算、逻辑运算及全机控制的部件是()。
A运算器 B控制器 C内存储器 D微处理器10、下列存储器中,()的特点是只能读出原有的内容,不能由用户再写入新内容。
ARAM BROM CDRAM DSRAM11、下列说法中,正确的说法是()。
A只要不上网就不会感染计算机病毒B计算机病毒实质上是一组被损坏的程序C计算机病毒具有隐蔽性、潜伏性、传播性、激发性和破坏性的特点D目前,所使用的防杀病毒软件的作用是检查出计算机已感染的所有病毒,清除部分已感染的病毒12、与八进制数106等值的十六进制数是()。
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2009年重庆普通专升本《大学英语》语法与词汇复习题(二)1. Raising the temperature of blood flowing to the brain causes _____ fe elings.A. unpleasantB. unpleasingC. unpleasedD. unbreathing2. I’d like to take _____ of this opportunity to thank you all for your co-operation.A. profitB. occasionC. benefitD. advantage3. We have come to a critical moment. You must take immediate_____.A. actionB. actC. activityD. doings4._____, what he said at the meeting is true except that a few figures he quoted are not very reliable.A. In generalB. In particularC. In respectsD. As a matter of fact5. Owing to the storm, the flight was _____ for one and a half hours.A. stoppedB. givenC. delayedD. cancelled6. She will always _______ in mind what her parents told her when s he left home.A. placeB. keepC. controlD. put7. If you want to telephone him you will have to _______ the number in the book.A. look atB. look upC. look throughD. look after8. I looked at the window for three minutes, and then the light_____.A. went downB. went outC. went upD. went back9. The room was so quiet that she could hear the of her heart.A. hittingB. beatingC. hurtingD. striking10. There are four chairs in the room, one in each_____.A. wallB. cornerC. sideD. edge11. It is impossible for us to ______ such a difficult task within a limited time.A. fillB. foreseeC. fulfillD. forecast12. Tom told his mother he was going to go over his lessons, buthe went to bed.A. almostB. actuallyC. immediatelyD. hardly13. We don’t think that his ______ ability has been well developed.A. possibleB. potentialC. underneathD. hidden14. Staying in a hotel costs ________ renting a room in a dormitory.A. twice more thanB. as much twice asC. twice as much asD. as much as twice15. Before long he noticed ___________.A. something interesting veryB. interesting very somethingC. something very interestingD. very interesting something16. The _____ of the sugar is of course to sweeten the medicine.A. reasonB. needC. causeD. purpose17. We had a long meeting yesterday. It _____ four hours.A. keptB. spentC. continueD. lasted18. Mr. Brown has a strong _____ of duty.A. senseB. emotionC. feelingD. thought19. The secretary said: “You are_____ on the phone, Mr. Smith.”A. wantedB. asked toC. invitedD. requested20. He stopped his car in front of the hotel to _____ her up.A. moveB. pickC. chooseD. select21. As citizens of China, we ________ do our best for the 2008 Olympi cs.A. wouldB. mightC. shouldD. could22. That morning they ________up early in order to catch the 6:00 bus to go to town.A. had gotB. have gotC. gotD. were getting23. The volleyball match will be put off if it________.A. will rainB. rainsC. rainedD. is raining24. I ______ him an e-mail as I wanted to know when he ______ to vis it us.A. send; comesB. sent; would comeC. sent; cameD. send; is coming25. I had neither a raincoat nor an umbrella. _______ I got wet through.A. It's reasonB. That’s whyC. There’s whyD. It’s how26. Sorry,my answer is different _________ yours.A. atB. toC. withD. from27. I’m sure she will give me a call once she ________ home.A. got backB. has got backC. will getD. gets back28. Bring me the ________ and I’m going to make some tea for us.A. pot of teaB. pot for teaC. tea’s potD. tea pot29. He got very angry when he found that his bike _______.A. had stolenB. is stolenC. be stolenD. had been stolen30. How much _________ the meat ________?A. is; weighingB. does; weighC. has; weighedD. was; weighing31. It is necessary that the younger generation _______ more about the real world.A. knewB. knowC. knowsD. knowing32. If we’re not mistaken, this is the third time you ______the same mist ake.A. had madeB. have madeC. makeD. made33. _______ a teacher, one must be a pupil first.A. BeingB. Having beenC. To beD. To have been34. ______ to rain tomorrow, they would put off the sports meeting.A. If it shouldB. If were itC. Should itD. Were it35. _______, ice will melt and turn into water.A. When heatingB. HeatedC. Be heatedD. Heating参考答案:1.A2.D3.A4.A5.C6.B7.B8.B9.B10.B 11.C12.B13.B14.C15.C16.D17.D18.A19.A20.B 21.C22.C23.B24.B25.B26.D27.D28.D29.D30.B 31.B32.B33.C34.D35.B。