【考研类试卷】考研英语二（完形填空）-试卷78及答案解析.doc

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1、考研英语二（完形填空）-试卷 78 及答案解析(总分：120.00，做题时间：90 分钟)一、Use of English(总题数：3，分数：120.00)1.Section I Use of EnglishDirections: Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D.（分数：40.00）_Li-Fi, an alternative to Wi-Fi that transmits data using the spectrum of visib

2、le light, has achieved a new breakthrough, with UK scientists reporting transmission speeds of 10Gbit/smore than 250 times faster than “superfast“ broadband. The fastest speed【C1】_reported was 3Gbit/s, achieved earlier this year in Germany. Chinese researchers also claimed this month to have【C2】_a 1

3、50Mbp/s connection, but some experts were doubtful without seeing further【C3】_ The term Li-Fi was【C4】_by Edinburgh University“s Prof Harald Haas【C5】_the technology is also known as visible light communications (VLC). Many experts claim that Li-Fi represents the future of mobile internet【C6】_its redu

4、ced costs and greater efficiency compared to traditional Wi-Fi. Both Wi-Fi and Li-Fi transmit data【C7】_the electromagnetic spectrum, but【C8】_Wi-Fi utilizes radio waves, Li-Fi uses visible light. This is a【C9】_advantage in that the visible light is far more plentiful than the radio spectrum (10,000 t

5、imes more in fact) and can achieve far greater data【C10】_Li-Fi signals work by【C11】_bulbs on and off【C12】_quicklytoo quickly to be noticed by the human eye. This most recent breakthrough builds upon this by using tiny micro-LED bulbs to【C13】_several lines of data in parallel. The research was carrie

6、d out by the Ultra Parallel Visible Light Communications project, and funded by the Engineering and Physical Sciences Research Council. Existing LED light bulbs could be【C14】_to transmit Li-Fi signals with a single microchip, and the technology would also be of use in situations where radio frequenc

7、ies cannot be used for fear of【C15】_with electronic circuit. And although Li-Fi bulbs would have to be kept on to transmit data, the bulbs could be【C16】_to the point that they were not visible to humans and yet still【C17】_. One draw-back is that the data receiver would have to be in sight of the tra

8、nsmitter-bulb as visible light does not【C18】_solid materials. The makers of Li-Fi note that this quality might actually be an advantage in some【C19】_making Li-Fi more【C20】_than Wi-Fi with hackers unable to access unsecured internet connections from out of sight of the transmitter.（分数：40.00）(1).【C1】（

9、分数：2.00）A.subsequentlyB.presentlyC.latelyD.previously(2).【C2】（分数：2.00）A.producedB.stimulatedC.contributedD.increased(3).【C3】（分数：2.00）A.truthB.proofC.actD.growth(4).【C4】（分数：2.00）A.producedB.coinedC.composedD.designed(5).【C5】（分数：2.00）A.unlessB.ifC.thoughD.since(6).【C6】（分数：2.00）A.thanks toB.in spite of

10、C.but forD.except for(7).【C7】（分数：2.00）A.byB.withC.uponD.over(8).【C8】（分数：2.00）A.althoughB.ifC.whereasD.because(9).【C9】（分数：2.00）A.dubiousB.additionalC.distinguishableD.distinct(10).【C10】（分数：2.00）A.densityB.structureC.analysisD.collection(11).【C11】（分数：2.00）A.adjustingB.modifyingC.switchingD.changing(12

11、).【C12】（分数：2.00）A.identifiablyB.incrediblyC.constantlyD.frankly(13).【C13】（分数：2.00）A.streamB.moveC.stirD.float(14).【C14】（分数：2.00）A.controlledB.createdC.convertedD.regulated(15).【C15】（分数：2.00）A.combiningB.connectingC.competingD.interfering(16).【C16】（分数：2.00）A.loweredB.brightenedC.flickeredD.dimmed(17)

12、.【C17】（分数：2.00）A.functionalB.noticeableC.transparentD.conspicuous(18).【C18】（分数：2.00）A.pierceB.prickC.penetrateD.stab(19).【C19】（分数：2.00）A.plotsB.scenariosC.placesD.settings(20).【C20】（分数：2.00）A.secureB.riskyC.definiteD.dangerousChildren need exercise. Parents often worry that 【C1】_time for athletics o

13、r even for just playing on the Jungle Jim is going to take away from their kids“ 【C2】_achievement. But actually, the【C3】_is true. There have been analyses of huge numbers of studies that all show that kids who are【C4】_are better in school, get better grades, and have higher【C5】_scores than kids who

14、lack of exercise. And that is probably because【C6】_the lifespan, even into old age, there“s a strong correlation between a healthy heart and a healthy brain. The brain is the most【C7】_organ that your circulatory system has to【C8】_. It takes up a lot of the body“s oxygen and a lot of the body“s【C9】_.

15、 And unlike most of your【C10】_your brain can“t live very long【C11】_that blood supply. You cut blood supply off for about five minutes and parts of the brain start dying. So blocked arteries and little clots that cut off blood flow to the brain in older people are a【C12】_source of cognitive difficult

16、y and cognitive deterioration with age. And even in little kids, being physically fit clearly【C13】_intellectual performance. The other thing parents should be thinking about is that in childhood your kid needs about 90 minutes a day of active【C14】_, and parents should really【C15】_, I think, on makin

17、g sure that that“s fun, first of all. You don“t want to【C16】_exercise as punishment. And you also, I think, want to have them doing something that could potentially continue into adulthood.【C17】_much your kids like climbing trees, they“re not going to be doing that when they“re 40, not most of us an

18、yway. And【C18】_you give them a sport or a taste for hiking or a taste for yoga, something that grownups do, you【C19】_reduce the chance that they“re going to be one of the large numbers of people who are active children who grow into inactive adults. Usually that【C20】_happens around the age of 13 or

19、so.（分数：40.00）(1).【C1】（分数：2.00）A.wastingB.spendingC.makingD.killing(2).【C2】（分数：2.00）A.physicalB.academicC.socialD.educational(3).【C3】（分数：2.00）A.storyB.worryC.expectationD.opposite(4).【C4】（分数：2.00）A.fitB.goodC.positiveD.inactive(5).【C5】（分数：2.00）A.testB.sportsC.wisdomD.intelligence(6).【C6】（分数：2.00）A.fo

20、rB.acrossC.beforeD.by(7).【C7】（分数：2.00）A.challengingB.necessaryC.simpleD.demanding(8).【C8】（分数：2.00）A.constituteB.keepC.feedD.foster(9).【C9】（分数：2.00）A.nerveB.energyC.foodD.power(10).【C10】（分数：2.00）A.cellsB.texturesC.partsD.tissues(11).【C11】（分数：2.00）A.withoutB.includingC.withD.except(12).【C12】（分数：2.00）A

21、.splendidB.richC.largeD.significant(13).【C13】（分数：2.00）A.reducesB.intensifiesC.enhancesD.aggravates(14).【C14】（分数：2.00）A.moving outB.moving aroundC.moving upD.moving on(15).【C15】（分数：2.00）A.dependB.countC.baseD.focus(16).【C16】（分数：2.00）A.instituteB.interpretC.proveD.describe(17).【C17】（分数：2.00）A.Whenever

22、B.SoC.HowD.However(18).【C18】（分数：2.00）A.meanwhileB.althoughC.ifD.since(19).【C19】（分数：2.00）A.greatlyB.barelyC.nearlyD.hardly(20).【C20】（分数：2.00）A.improvementB.growthC.transitionD.transfer考研英语二（完形填空）-试卷 78 答案解析(总分：120.00，做题时间：90 分钟)一、Use of English(总题数：3，分数：120.00)1.Section I Use of EnglishDirections: Re

23、ad the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D.（分数：40.00）_解析：Li-Fi, an alternative to Wi-Fi that transmits data using the spectrum of visible light, has achieved a new breakthrough, with UK scientists reporting transmission speeds of 10Gbit/smore than 25

24、0 times faster than “superfast“ broadband. The fastest speed【C1】_reported was 3Gbit/s, achieved earlier this year in Germany. Chinese researchers also claimed this month to have【C2】_a 150Mbp/s connection, but some experts were doubtful without seeing further【C3】_ The term Li-Fi was【C4】_by Edinburgh

25、University“s Prof Harald Haas【C5】_the technology is also known as visible light communications (VLC). Many experts claim that Li-Fi represents the future of mobile internet【C6】_its reduced costs and greater efficiency compared to traditional Wi-Fi. Both Wi-Fi and Li-Fi transmit data【C7】_the electrom

26、agnetic spectrum, but【C8】_Wi-Fi utilizes radio waves, Li-Fi uses visible light. This is a【C9】_advantage in that the visible light is far more plentiful than the radio spectrum (10,000 times more in fact) and can achieve far greater data【C10】_Li-Fi signals work by【C11】_bulbs on and off【C12】_quicklyto

27、o quickly to be noticed by the human eye. This most recent breakthrough builds upon this by using tiny micro-LED bulbs to【C13】_several lines of data in parallel. The research was carried out by the Ultra Parallel Visible Light Communications project, and funded by the Engineering and Physical Scienc

28、es Research Council. Existing LED light bulbs could be【C14】_to transmit Li-Fi signals with a single microchip, and the technology would also be of use in situations where radio frequencies cannot be used for fear of【C15】_with electronic circuit. And although Li-Fi bulbs would have to be kept on to t

29、ransmit data, the bulbs could be【C16】_to the point that they were not visible to humans and yet still【C17】_. One draw-back is that the data receiver would have to be in sight of the transmitter-bulb as visible light does not【C18】_solid materials. The makers of Li-Fi note that this quality might actu

30、ally be an advantage in some【C19】_making Li-Fi more【C20】_than Wi-Fi with hackers unable to access unsecured internet connections from out of sight of the transmitter.（分数：40.00）(1).【C1】（分数：2.00）A.subsequentlyB.presentlyC.latelyD.previously 解析：解析：本句提到 Li-Fi 的最快传输速度是 3Gbits，今年早些时候(earlier this year)在德国

31、测得。D 项 previously“以前”与 earlier 对应，故正确。该词也与本句谓语动词所使用的一般过去时(文章整体使用一般现在时)构成正确语法搭配。(2).【C2】（分数：2.00）A.produced B.stimulatedC.contributedD.increased解析：解析：上句提到在德国获得的(achieved)最快传输速度是 3Gbits。本句与上句是顺接关系，继续说明 Li-Fi 的速度。A 项 produced“产生”能与后面的网速构成合理的动宾关系与 achieved 对应。(3).【C3】（分数：2.00）A.truthB.proof C.actD.growt

32、h解析：解析：本句提到专家们对中德两国测试的 Li-Fi 传输速度表示怀疑(doubtful)，介词 without 后接doubtful 的原因，but 表明了转折关系，因此 B 项 proof“证据”，表示没见到进一步的证据，因此表示怀疑。(4).【C4】（分数：2.00）A.producedB.coined C.composedD.designed解析：解析：本句是被动句，term(术语)是动作的承受者，爱丁堡大学 Harald Haas 教授是发出动作的人(by)。B 项 coined 表示“创造，发明”，说明 Harald Haas 教授是提出这个术语的人。(5).【C5】（分数：2

33、.00）A.unlessB.ifC.though D.since解析：解析：空格后表明 Li-Fi 的另一个名称是“可见光通信(VLC)”。同一事物却有两个不同的名称，“也被称为”(also known as)表明此空格处应填入表示语义转折的并列连词。C 项 though“尽管”，表转折，故正确。(6).【C6】（分数：2.00）A.thanks to B.in spite ofC.but forD.except for解析：解析：本句提到相对于传统的 Wi-Fi 来说，Li-Fi 成本更低、效率更高(reduced costs and greaterefficiency)，故成为未来移动互联

34、网的趋势。故选 A 项 thanks to，意思是“由于，多亏了”。(7).【C7】（分数：2.00）A.byB.withC.uponD.over 解析：解析：此空格需要填入一个能与电磁波谱搭配的介词构成方式状语。D 项 over 表示“通过媒介”，代入句中表示“Wi-Fi 和 Li-Fi 都是通过电磁波谱来传输数据”。(8).【C8】（分数：2.00）A.althoughB.ifC.whereas D.because解析：解析：前半句讲 Wi-Fi 和 Li-Fi 的相同点，but 表转折，后半句则讲两者的不同点：Wi-Fi 利用无线电波，Li-Fi 利用可见光波。选 C 项 whereas

35、“然而”，表对比。(9).【C9】（分数：2.00）A.dubiousB.additionalC.distinguishableD.distinct 解析：解析：上文提到，Wi-Fi 利用的是无线电波，Li-Fi 利用的是可见光波，本句顺接上文，说这是一种优势(advantage)，因为可见光波谱比无线电频谱要丰富得多。D 项 distinct 与 advantage 搭配表示“明显的优势”，符合语义。(10).【C10】（分数：2.00）A.density B.structureC.analysisD.collection解析：解析：空格前的 data 指的是可见光波谱及无线电频谱能够获得的

36、数据，前者是后者的 10,000 倍，与 far greater 对应，此句是对前半句作进一步的解释。data density 意为“数据密度”，数据传输的快慢程度与其密度关系密切，因此选 A 项。(11).【C11】（分数：2.00）A.adjustingB.modifyingC.switching D.changing解析：解析：空格需要填入能与 bulbs 搭配的动词，说明 Li-Fi 信号的工作原理，且能与 on andoff 连接。因此 C 项 switching 符合逻辑。(12).【C12】（分数：2.00）A.identifiablyB.incredibly C.constan

37、tlyD.frankly解析：解析：破折号后的内容是对上半句的补充说明，即“速度极快以至于肉眼无法觉察”。只有 B 项incredibly“非常地”符合题意。(13).【C13】（分数：2.00）A.stream B.moveC.stirD.float解析：解析：空格需要填入能与 several lines of data 搭配的谓语动词。上一句提到了 Li-Fi 信号是如何实现传输的，本句顺接上文，表明利用微小的 LED 灯泡来实现。A 项 stream 有“照射”的意思与lines of data搭配指传送数据，因为 data 的传输靠的就是灯泡照射出来的光线。(14).【C14】（分数：

38、2.00）A.controlledB.createdC.converted D.regulated解析：解析：空格后的 a single microchip(一个微芯片)是实现直接传输 Li-Fi 信号的条件。即对现有的 LED 灯泡进行改造，以实现传输 Li-Fi 信号的目的。故选 C 项 converted“转变”。(15).【C15】（分数：2.00）A.combiningB.connectingC.competingD.interfering 解析：解析：Li-Fi 可用于不适用 radio frequencies 的情况中，因为无线电频率对 electronic cir-cuit 有

39、影响。D 项 interfering 与 with 搭配表示“妨碍，干扰”，符合语义。(16).【C16】（分数：2.00）A.loweredB.brightenedC.flickeredD.dimmed 解析：解析：Li-Fi 的工作条件需要保持灯泡亮着(be kept on)，这是个缺点。although 表示转折，即这个缺点可以克服。that 从句意为“人眼看不到的程度”。将 D 项 dimmed“暗的”代入句中。表示把灯泡调暗，符合语义逻辑。(17).【C17】（分数：2.00）A.functional B.noticeableC.transparentD.conspicuous解析：

40、解析：空格前的 and yet“然而”提示即便是灯泡亮度达到人眼看不到的程度，还是可以正常工作。A 项 functional“发挥功能的”符合语义逻辑。(18).【C18】（分数：2.00）A.pierceB.prickC.penetrate D.stab解析：解析：此处讲 Li-Fi 的缺馅。that 从句讲到，数据接收器一定要处于用于传输数据的灯泡的照射范围内。而根据常识，可见光通常是无法穿透固体材料的，故选 C 项 penetrate“穿透”。(19).【C19】（分数：2.00）A.plotsB.scenarios C.placesD.settings解析：解析：上文提到 Li-Fi

41、的缺点，本句说明缺点有时也可以变为优点。B 项 scenarios 表示“方案；情节；剧本”，in some scenarios 是固定搭配，表示“在某些情况下”。(20).【C20】（分数：2.00）A.secure B.riskyC.definiteD.dangerous解析：解析：本句语境是 Li-Fi 的这个特性可能会成为一种优势，介词 with 此处表示原因：黑客无法攻击。故选 A 项 secure“安全的”。Children need exercise. Parents often worry that 【C1】_time for athletics or even for jus

42、t playing on the Jungle Jim is going to take away from their kids“ 【C2】_achievement. But actually, the【C3】_is true. There have been analyses of huge numbers of studies that all show that kids who are【C4】_are better in school, get better grades, and have higher【C5】_scores than kids who lack of exerci

43、se. And that is probably because【C6】_the lifespan, even into old age, there“s a strong correlation between a healthy heart and a healthy brain. The brain is the most【C7】_organ that your circulatory system has to【C8】_. It takes up a lot of the body“s oxygen and a lot of the body“s【C9】_. And unlike mo

44、st of your【C10】_your brain can“t live very long【C11】_that blood supply. You cut blood supply off for about five minutes and parts of the brain start dying. So blocked arteries and little clots that cut off blood flow to the brain in older people are a【C12】_source of cognitive difficulty and cognitiv

45、e deterioration with age. And even in little kids, being physically fit clearly【C13】_intellectual performance. The other thing parents should be thinking about is that in childhood your kid needs about 90 minutes a day of active【C14】_, and parents should really【C15】_, I think, on making sure that th

46、at“s fun, first of all. You don“t want to【C16】_exercise as punishment. And you also, I think, want to have them doing something that could potentially continue into adulthood.【C17】_much your kids like climbing trees, they“re not going to be doing that when they“re 40, not most of us anyway. And【C18】

47、_you give them a sport or a taste for hiking or a taste for yoga, something that grownups do, you【C19】_reduce the chance that they“re going to be one of the large numbers of people who are active children who grow into inactive adults. Usually that【C20】_happens around the age of 13 or so.（分数：40.00）(1).【C1】（分数：2.00）A.wastingB.spendingC.making D.killing解析：解析：文章开头谈到孩子需要锻炼，本句顺接上文说明家长对孩子参加体育活动的担忧。athletics 与 exercise 相对应，空格处需填入与 time 搭配的动名词，与 for构成宾语从句的主语。maketime for“腾出时间(做某事)”是固定搭配，选 C 项 making。(2).【C2】（分数：2.00）A.physicalB.academic C.socialD.educational解析：解析：此空格填入一个形容词来修饰 achievemen