1、基因型频率第二代起保持不变.若是自交，则后代所形成旳种群杂合子基因型频率一直下降.B单细胞生物子代同步繁殖旳种群数量变化数学模型为Nn=2n(Nn代表种群数量, n代表”代”数)C“S”型增长旳自然种群，如果用NtN0t 表示,则其中是一个变化值D灭鼠时如果仅杀死一半老鼠，老鼠旳数量将会更多泉州一中高二年上学期期末考生物试卷一、选择题（每小题2分，共50分）题号12345678910答案题号11121314151617181920答案题号2122232425 答案第卷（非选择题 ，共50分）二、非选择题：（5个小题，共50分）26（8分）下图表示某研究所在研制一种病毒旳疫苗旳过程中，某志愿者接
2、种疫苗后两周内血液中抗体浓度旳变化曲线，请分析回答： （1）从免疫学旳角度分析，疫苗进入人体后作为 使B细胞接受其刺激.这种识别依赖于细胞膜上旳 .（2）如果该志愿者在注射疫苗后旳第15天感染了这种病毒，结果在其感染后未有明显病症出现，原因是人体内产生旳 抑制了病毒旳繁殖或对人体细胞旳黏附.此时该物质产生旳途径是 .这种免疫方式属于特异性免疫中旳 .（3）请在上图中画出（2）题所述感染病毒后人体内抗体浓度旳变化曲线.（4）如果该病毒侵入人体细胞内，则被侵染旳细胞将成为 攻击旳靶细胞.这种免疫方式属于特异性免疫中旳 .27.(8分)下图表示神经系统和内分泌系统之间旳有关联系.请回答问题：（1）表
3、示旳结构名称是 ；表示旳结构名称是 .（2）图中有分泌激素功能旳结构是 、 及A结构即 .（3）当激素增多时，和都将减少，这种作用叫做 .（4）在动物体旳各项生命活动中，神经调节与体液调节之间旳关系可以概括为以下两个方面：一方面， ；另一方面，内分泌腺所分泌旳激素也可以影响神经系统旳功能，如 ，如果缺乏这种激素，就会影响幼年动物大脑旳发育.28. （10分）“标志（记）重捕法”是动物种群密度调查中旳一种常用旳取样调查法：在被调查种群旳生存环境中，捕获一部分个体（M）全部进行标记后释放，经过一段时间后进行重捕，根据重捕中标记个体数（m）占总捕获数（n）旳比例，估计该种群旳数量（N）.某研究机构对
4、我国北方草原上一种主要害鼠布氏田鼠进行了调查.调查样方总面积为2 hm2（1 hm2=10 000 m2），随机布设100个鼠笼，放置1夜后，统计所捕获旳鼠数量、性别等，进行标记后放归；3日后进行重捕与调查.所得到旳调查数据如下表.捕获数/只标记数/只雌性个体数雄性个体数初捕32321418重捕3641818（1）写出样方中种群总数（N）旳计算公式 .（2）该草地布氏田鼠旳平均种群密度为 只/hm2.事实上田鼠在被捕捉过一次后更难捕捉，上述计算所得旳平均种群密度与实际种群密度相比可能会偏 .（3）综合两次捕获情况，该田鼠种群旳性别比例（/）为 .（4）在上述调查旳同时，还对样方中布氏田鼠旳洞口
5、数进行了调查（假设样方中只有这一种鼠），平均每100 m2有3.6个洞口，洞口数与田鼠数旳比例关系为 .29(10分)某研究性课题小组旳同学对植物生长素非常有研究兴趣，设计了如下实验来探究单侧光使生长素由向光侧向背光侧转移了，还是单侧光将向光侧生长素分解了？（1）某同学研究植物向光性旳原因时，进行了下图所示旳实验，你从实验中获得旳结论是： ；试分析获得这一结论旳理由： .（2）另一同学做了下图所示旳实验，将经过甲图处理后旳琼指块，分别放在切去尖端旳胚芽鞘切面上（见乙图），一段时间后，观察胚芽鞘旳生长情况.若胚芽鞘旳长度关系为 ，说明单侧光使生长素转移了；若胚芽鞘旳长度关系为 ，说明单侧光将生长
6、素分解了.右图为温特实验示意图，它证明了 30.（14分）下图为某种反射弧示意图，其中为电激实验点，ABCDE为观测或测量点.用电刺激，结果A发生运动反应；电激，结果A反应而E无反应.结合下列实验回答问题：给你提供必要旳实验用具，如电刺激设备、电位测量仪等，请设计实验方案，以探究兴奋在神经纤维上和在相邻两神经元之间旳传递特点（是双向旳还是单向旳），并预期可能旳实验结果及结论.a.探究冲动在神经纤维上旳传导方法步骤：电激处，观察 ，同时 有无变化. 结果和结论：若 ，说明冲动在神经纤维上旳传导是双向旳；（1分）若 ，则说明冲动在神经纤维上旳传导是单向旳.（1分）b.探究冲动在神经元之间旳传递方法
7、步骤：先电激处， ；再 ，测量 结果和结论：若 ，说明冲动在神经元之间旳传递是双向旳；（1分）若 ，则说明冲动在神经元之间旳传递是单向旳（1分）一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一
8、一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一
9、一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一
10、一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一.甘肃兰州五十五中2019年高三上年中考试试题-英语 高三 英语 时间：120分钟 满分：150分第一部分：单项填空（共20小题；每小题1.5分， 满分30分）从A、B、C、D四个选项中，选出可以填入空白处的最正确选择，并把答案写在答题卷上。1Where can we park car?Dont worry. Theres sure
11、 to be parking lot nearby.Athe; theBthe; aC不填; aD不填; the2 Advertisements have become part of our everyday life and so it is important that we _ ourselves about them to protect us from being fooled by themA must educate B might educate C could educate D educate3 What shall we use for power when all t
12、he oil in the world has _?A given out B put out C held up D used up4Why did you come by taxi?My car broke down last week and I still it repaired.Adidnt haveBhadnt hadChavent hadDwont have5I wanted to give you some bread, but was left.Aneither BnothingCnoneDno one6Professor Li for his informative lec
13、ture, was warmly received by the students.AknownBknowingChaving knownDto be known7 theyve managed to get everything finished so quickly is not clear to us.AWhichBWhatCThatDHow8You know quite a lot about the fashion show.Well, Cathy it to me during lunch.AintroducesBintroducedChad introducedDwill int
14、roduce9Sorry Im so late, but you cannot imagine great trouble I took to find your house.AwhichBhowCwhatDthat10A fireworks display was organized the Queens birthday.Ato markBmarked Chaving markedD.being marked11Peter is helping set tables in the hall, where Johns birthday party .Ais holdingBhas heldC
15、is heldDwill be held12 two hours daily has made considerable difference to my physical condition.ATo walkBWalkingCWalked D.Having walked13They came back from their long walk and went into bed, .Atiredly but relaxingBtired but relaxingCtiredly but relaxedDtired but relaxed14I was on a business trip t
16、hen, otherwise I to the hospital for tests.Awent Bhad goneCwould have goneDwould go15Only when we saw the photos about the celebration of Christmas in Yangzhou Daily _ how splendid it wasA had we known B we had known C did we know D we know16 Amy joined a painting group but didnt seem to _, so she l
17、eftA set loose B show off C appeal to D fit in17 There is one other dangerous animal in Australia worth _ and that is the crocodileA mentioned B to be mentioned C being mentioned D mentioning 18 Seeing the happy _ of children playing in the park, Im full of joy and confidence in the future of our co
18、untryA sightB scene C view D sign19 Television ads are expensive to make and to show, so you have to be a big corporation with a big budget to _ television ads A reward B afford C award D record 20 However good an advertisement is, people are _ to be persuaded if the product is unsuitable for themA
19、impossible B unlikely C difficult D constantly 第二部分：完形填空(共20小题：每小题1.5分，共30分)阅读下面短文，掌握其大意，从每题所给的A、B、C、D四个选项中，选出最正确选项。I had arrived at the airport about 30 minutes before the checkin It had been a very 21 three days for me with lots of meetings So I was glad to have the 22 time to make my notes on wha
20、t I 23 to do the following day But then came the 24 that my flight had to be25 because there was a problem with the planeAs I sat waiting for my 26 to be called, I reflected on my last meeting of the day It was not a business meeting but rather a very enjoyable 27 with an old business friend I had n
21、ot seen for over 12 years Our lunch was spent recalling times gone by 28 filling each other in what had happened in our lives over the last 12 years We both laughed and smiled as we recalled the good times and the great experiences we had 29 together At the end of our time together, we both said how
22、 much we had 30 it and that we must do it againIt was great to have this additional time to replay in my 31 all that we had talked about I realized just how important it was to have regular 32 of the good times in our life I was lucky enough to have had the chance to take a short 33 and reflect on t
23、he good things that had happened in my life over 12 yearsIt was somewhat like looking at an old photo album 34 in a cupboard in your house There before your eyes are lots of wonderful 35 that take you back to times and places, and most importantly to those people who are in the 36 My flight home was
24、 finally 37 three hours later I smiled as I 38 the plane and realized that I was not at all 39 about the delay in the flight, as I had been able to spend the time 40 on the good times from days gone by21A importantB busyC quickD useful22A pleasantB satisfyingC happy D extra23A had B failed C neededD
25、 asked24A announcement B declarationC opening D speech25A waitedB cancelled C taken D delayed26A flightB turn C name D order27A negotiationB lunchC party D discussion28A as wellB except forC as well asDin addition29A spent B met C managed D shared30A got B enjoyed C madeD paid31A thought B spiritC f
26、lightD mind32A time B plansC reminders D remains33A way B cut C method D break34A stored awayB put on C set aside D given out35A celebrationsB memoriesC awards D presents35A cupboard B booksC childhoodD photos36A shoutedB phoned C called D commanded38A leftB boardedC jumped D reached39A upset B happ
27、yC crazyD surprised40A takingB seizingC reflectingD bringing第三部分：阅读理解（共两节,共40分）第一节：阅读以下短文，从每题所给的四个选项（A、B、C和D）中，选出最正确选项。(15小题；每小题2分，满分30分)。 AThe common cold is the worlds most widespread illness, which is probably why there are more myths(神话，想象) about it than any of the other illnesses.The most wides
28、pread mistake of all is that colds are caused by coldThey are notThey are caused by viruses passing on from person to personYou catch a cold by coming into contact, directly or indirectly, with someone who already has oneIf cold causes colds, it would be reasonable to expect the Eskimos to suffer fr
29、om them foreverBut they do notAnd in isolated Arctic regions explorers have reported being free from colds until coming into contact again with infected(感染的) people from the outside world by way of packages and mail dropped from airplanesAt the Common Cold Research Unit in England, volunteers took p
30、art in Experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of timeAfter taking hot baths, they put on bathing suits, allowed themselves to be doused(浸入) with cold water, and then stood about dripping（滴干） wet in drafty（通风的） roomsSome wore wet socks al
31、l day while others exercised in the rain until close to exhaustionNot one of the volunteers came down with a cold unless a cold virus was actually dropped in his noseIf cold and wet have nothing to do with catching colds, why are they more frequent in the winter? In spite of the most painstaking res
32、earch, no one has yet found the answerOne explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed onNo one has yet found a cure for the coldThere are drugs and pain suppressors suc
33、h as aspirin, but all they do is to relieve the symptoms（症状）41The fact that the Eskimos dont suffer colds shows that .Acolds are really full of mythsBviruses are the factors causing coldsCcolds are more severe than other illnessesDthe idea that cold leads to colds doesnt stand up42The experiments me
34、ntioned in Paragraph 济金融形势和严峻的内外部挑战，要以习近平新时代中国特色社会主义思想 为指导，全面贯彻党的十九大和十九届二中、三中、四中、五中全会精神，紧 扣全面建成小康社会目标任务，全力支持统筹推进疫情防控和经济社会发展工 作。在疫情防控常态化背景下，坚持稳中求进工作总基调，坚持新发展理念， 坚持以供给侧结构性改革为主线，坚持以改革开放为动力，扎实做好“六稳” 工作，全面落实“六保”任务，坚决打好三大攻坚战，促进经济高质量发展。 加大宏观政策调节力度。财政政策更加积极有为，适度提高财政赤字率， 较大幅度增加国债和地方政府专项债券发行规模，加大减税降费力度，大力优 化财
35、政支出结构，切实保障重点领域支出。稳健的货币政策更加灵活适度、精 准导向，保持货币供应量和社会融资规模合理增长，完善跨周期设计和调节， 实现稳增长和防风险长期均衡。 进一步推进金融机构改革。继续推动全面落实开发性、政策性金融机构改 革方案，完善治理体系，遵循金融机构经营规律，发挥开发性、政策性金融机 构作用。持续深化商业银行和其他金融企业改革，完善公司治理，规范股东大 会、董事会、监事会与管理层关系，完善经营授权制度，形成有效的决策、执 行、制衡机制，提高经营管理水平和风险控制能力。深化农村信用社等中小金 融机构改革，引导保险公司回归保障功能。 继续有效防范化解重大金融风险。在巩固防范化解重大
36、金融风险攻坚战已 经取得的重要成果基础上，不断提高风险应对的全局性和前瞻性，继续做好重 点领域高风险机构的“精准拆弹”工作。进一步厘清各方职责边界，压实金融 机构的主体责任、地方政府属地风险处置责任、金融监管部门监管责任，人民 银行发挥好最后贷款人责任，坚决防范道德风险。着力推动完善防范化解金融 风险长效机制建设，用改革的办法推进金融业高质量发展，牢牢守住不发生系 统性风险的底线。 加快建设高标准市场体系，推动更高水平对外开放。加快国企改革，推动 国有资本布局优化调整。完善产权制度和要素市场化配置，健全支持民营经济 发展的法治环境，完善中小企业发展的政策体系。完善资本市场基础制度，提 高上市公
37、司质量，健全退出机制。要在更大范围、更宽领域、更深层次继续对 15第一部分 宏观经济运行情况 外开放，加强外商投资促进和保护。高质量共建“一带一路”，发挥企业主体 作用，开展互惠互利合作。引导对外投资健康发展，推动贸易和投资自由化便 利化。 16 专题一 主要经济体应对疫情的财政金融政策梳理 2020年3月以来，随着新冠肺炎疫情在全球蔓延，主要经济体推出大规模 财政金融政策组合并持续加大政策力度a，应对疫情冲击。总体看，这些应对 政策响应快、规模大、范围广，针对疫情冲击造成的经济“骤停”，发挥了民 生保障作用，缓解了企业和居民的现金流压力，有助于缓解经济下行趋势，稳 定金融市场，但一些潜在影响
38、也不容忽视。 一、财政政策侧重经济救助，提供民生保障 主要经济体均出台大规模财政政策应对疫情冲击，加强企业救助和民生 保障。 一是公共部门优惠贷款。一些经济体拨款设立特别贷款计划或向现有 项目追加资金，通过出口促进机构或开发银行等机构，发放公共部门优惠 贷款。例如，欧洲理事会推出7 500亿欧元“复苏基金”，其中3 600亿欧 元以贷款形式用于各成员国恢复经济。欧盟委员会通过欧洲稳定机制推出 2 400亿欧元疫情危机支持项目（PCS），向欧元区国家提供贷款（上限为该国 2019年GDP的2%），支持卫生领域相关支出；建立临时的紧急状态下减轻失 业风险援助项目（SURE），提供1 000亿欧元优
39、惠贷款，用于保护就业。 二是政府贷款担保。大多数经济体推出企业贷款公共担保措施，以支持和 鼓励银行继续发放贷款。担保金额和担保比例各不相同，全额贷款担保通常针 对小型企业。例如，美国建立3 490亿美元薪酬保障计划（PPP），为500人以 下的小企业提供可豁免贷款，由小企业管理局提供全额担保。 三是政府注资。一些经济体以政府注资形式向受到严重冲击的行业提供直 接援助。例如，德国在经济稳定基金中拨出1 000亿欧元用于收购受影响大型 企业的股份以强化其资本；法国政府对部分陷入困境的企业进行股权投资或国 有化。 a 信息截至2020年7月末。 17第一部分 宏观经济运行情况 四是直接补贴。一些经济
40、体对受困企业和个人发放补贴。例如，欧盟成员 国可向受疫情影响的企业提供最高80万欧元的直接补贴；美国政府向年收入低 于7.5万美元的个人发放1 200美元补贴；英国政府从2020年3月至10月对因疫情 被迫休假的雇员发放80%工资，每人每月最高2 500英镑。 五是缓缴或减免税费。主要经济体普遍出台政策对受疫情影响的企业、家 庭或个人采取缓缴或减免税收、社保、房租、水电费等措施。例如，韩国对疫 情严重地区的中型企业减免30%所得税，小企业减免60%所得税，最高限额不 超过2亿韩元；俄罗斯对登记在册的个体经营者退还2019年全部税收和2020年 部分税收。 二、货币政策侧重提供流动性，支持实体经
41、济融资 主要经济体央行通过降息降准、量化宽松和定向融资支持等货币政策工具 提供大规模流动性，支持实体经济融资。 一是降息降准。美联储两次紧急降息共150个基点，将联邦基金利率目标 区间降至0-0.25%，并将存款准备金率降为0。英格兰银行两次降息共65个基 点至0.1%。加拿大央行降息150个基点至0.25%。其他主要经济体货币当局降 息25个基点至275个基点不等。 二是重启或加码量化宽松。美联储2020年3月15日推出7 000亿美元量化宽 松计划，3月23日宣布无限量按需买入国债和机构债券。欧央行决定在现有项 目下新增1 200亿欧元资产购买规模，并推出1.35万亿欧元的紧急抗疫购债计划
42、 （PEPP），期限至少持续至2021年6月。英格兰银行增持3 000亿英镑国债和非 金融企业债，将资产购买规模上调至7 450亿英镑。日本央行决定购买必要数 量的日本国债且不设上限；将交易所交易基金（ETF）年度购买规模增加至12 万亿日元，将商业票据和企业债的持有量上限提高至20万亿日元。 三是提供定向融资支持和流动性便利。主要经济体央行推出多种融资工具 和流动性便利，并通过扩大合格对手方和抵押品范围增加资金供给规模。其中 尤以美联储推出的工具最为丰富，包括商业票据融资工具（CPFF）、一级交 易商信贷工具（PDCF）、货币市场共同基金流动性工具（MMLF）、一级市 场公司信贷工具（PMCCF）、二级市场公司信贷工具（SMCCF）、定期资产 支持证券贷款工具（TALF）、薪酬保障计划流动性工具（PPPLF）、大众企 业贷款项目（MSLP）、市政流动性工具（MLF）等多种工具，向金融机构、 企业、居民、地方政府等提供广泛的大规模融资支持。此外，为缓解海外市场 18 美元流动性紧张，美联储重启与五家央行a的货币互换安排，并将互换范围临 时扩展至其他九家央行b。欧央行新设流动性便利，由一系列非定向疫情紧急 长期再融资操作（PELTRO）组成。英格兰银行新设定期融资计划，强化降息 传导，鼓励舠錠鈐
