首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
Anybody who doesn’t know much about nanotechnology should【B1】 ________ geckos. These are the lizards that are probably the worl
Anybody who doesn’t know much about nanotechnology should【B1】 ________ geckos. These are the lizards that are probably the worl
admin
2021-09-25
65
问题
Anybody who doesn’t know much about nanotechnology should【B1】 ________ geckos. These are the lizards that are probably the world’s best climbers. Watching them climb upside down on a horizontal pane of glass, you realize that spiderman should really have been called geckoman. These guys outclimb spiders any day.
With perfect【B2】 ________ they can hang from a single toe, and they do so by pure adhesion, not by sticking a toe in a hole or by【B3】 ________ it round something they can grip. With all the toes on the glass scientists【B4】 ________ that if the rest of the body were strong enough it could take the weight of a 100kg person【B5】 ________ below it. Although each toe is【B6】 ________ with a tiny hook-like claw at the end, these are of no use on the glass. What keeps them up there is the amazing structure of the skin of the toe.
Seen under the microscope each toe has around two million tiny hairs on its underside. Under the higher【B7】 ________ of an electron microscope the end of each of these hairs is seen to【B8】 ________ into hundreds of even tinier nano-hairs, which scientists have called spatulae. These hairs are so small that they are able to establish contact with the molecular structure of the surface the gecko is walking on. With that near-perfect contact the hairs are stuck to the surface by forces called van der Waals forces. The molecules on the feet and on the surface have areas of slight positive or negative【B9】 ________ that attract each other like mini magnets when they get really close.
Scientists have been working for over 15 years now to try to【B10】 ________ the secrets of the stickiness of gecko toes and find a way to【B11】 ________ reproduce the same structure of nano-hairs. The【B12】 ________ at the moment is that if any material can be shaped into nano-hairs they will have the same【B13】 ________ as those on gecko toes, so scientists are looking for a (n) alternative material with which to【B14】 ________ the stickiest synthetic surface ever.
This is one example of research in the field now known as nanotechnology. In this field, the technology being created can be【B15】 ________ in a few nanometres (one nanometre is a millionth of a millimetre). Interest in developing technology at this level was largely inspired by Richard Feynman at the beginning of the 1960’s, but the "nano" catchphrase was【B16】 ________ in the 1990’s by Dr. Eric Drexler, who【B17】 ________ scientists on through a series of speeches and a book entitled " Engines of Creation; The Coming Era of Nanotechnology".
The scientists working on the geckos【B18】 ________ an enormously wide range of possible applications for the kind of adhesive nanotechnology that they will develop. The one that will make the biggest splash in the media will be the gloves and the boots that will allow rock-climbers to take their sport to【B19】 ________ undreamed of heights. And the technology could also be used in surgery to keep the edges of wounds together without the need for stitches. There will also be a huge potential in the manufacturing sector to stick millions of 【B20】 ________ together tighter than ever before without glues or screws.
【B18】
选项
A、accelerate
B、innovate
C、delude
D、envisage
答案
D
解析
逻辑关系和词义辨析题。选项的意思分别为[A]“加速”;[B]“创新”;[C] “欺骗”;[D]“想象,设想”。结合前文,到目前科学家还未发明出仿壁虎纳米毛发的材料,且本句中的possible applications也暗示了新材料应用是未来的可能性,因此研究壁虎的科学家们只能是想象、设想这种新型纳米材料未来的应用前景,因此答案选[D]。
转载请注明原文地址:https://kaotiyun.com/show/Zp1Z777K
0
考研英语一
相关试题推荐
In1924America’sNationalResearchCouncilsenttwoengineerstosuperviseaseriesofexperimentsatatelephone-partsfactory
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
ThehomelessmakeupagrowingpercentageofAmerica’spopulation.【C1】______,homelessnesshasreachedsuchproportionsthatlo
Researchonanimalintelligencealwaysmakesmewonderjusthowsmarthumansare.【C1】______thefruit-flyexperimentsdescribed
Researchonanimalintelligencealwaysmakesmewonderjusthowsmarthumansare.【C1】______thefruit-flyexperimentsdescribed
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Shortstoriesareduearevival.Inrecentyears,therehavebeencritically【C1】______collectionsbyAmericanwriterssuchasLy
Muchoftheworldshouldgoonadietin2014.Morethanathirdofadults【C1】______wereestimatedtobe【C2】______orobesein20
Cellphoneusehasexplodedinmanycountries,easingcommunicationbetweenindividualsbutcausingsocialmalaiseaswell.Int
Lastweekwasthebeginningofstandardizedtesting"pre-season"atmyschool.【F1】It’snothingcomparedtowhathappensinthe
随机试题
我国各民族自治地方的自治机关享有的自治权利主要有()
所有权是物权的一种,属于()
男性,29岁,高处坠落2小时后送医院,主诉胸背部疼痛,双下肢不能活动。患者在治疗过程中,出现持续高热,应考虑的原因可能存在
下列选项中,属于环境管理培训的内容有()。
地毯面层采用的材料进入施工现场时,应有地毯、衬垫、胶粘剂中的()合格的检测报告。
某知名财经网站,具有增值电信业务经营资质,2010年3月发生以下业务: (1)开展“金牌理财师”远程培训业务,取得培训费入130万元,并向学员出售配套培训教材取得收入70万元。 (2)发布网络广告,取得广告收入5000万元,其中支付某动漫设计室设计
学问的本来意义与人的生命、生活有关。但是,如果学问成为口号或教条,就会失去其本来的意义。因此,任何学问都不应该成为口号或教条。
计算行列式
Oneofthemisconceptionsaboutelitesportisthatgreatathleteshavenothingincommonwithnormalhumanbeings.【C1】______the
Structurallinguisticsisanapproachtolinguisticsoriginatingfromtheworkof______.
最新回复
(
0
)