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
59
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
Whereveryouwork,youmustalwaysservethepeoplewhole-heartedly.
In1924America’sNationalResearchCouncilsenttwoengineerstosuperviseaseriesofexperimentsatatelephone-partsfactory
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,【C1】______this
Researchonanimalintelligencealwaysmakesmewonderjusthowsmarthumansare.【C1】______thefruit-flyexperimentsdescribed
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Shortstoriesareduearevival.Inrecentyears,therehavebeencritically【C1】______collectionsbyAmericanwriterssuchasLy
Shortstoriesareduearevival.Inrecentyears,therehavebeencritically【C1】______collectionsbyAmericanwriterssuchasLy
Muchoftheworldshouldgoonadietin2014.Morethanathirdofadults【C1】______wereestimatedtobe【C2】______orobesein20
Thepolicemenwentintoaction______theyheardthealarm.
随机试题
明成祖登基后曾派郑和出使西洋以加强同海外的联系,下列关于郑和下西洋说法正确的是()。
经典途径的C3转化酶是
男性,50岁,2小时前木棒击伤左颞部,伤后头痛呕吐,1小时前意识不清,查体中度昏迷,左瞳孔散大,右侧肢体病理征(+),诊断考虑为
A.每1ml相当于原药材1g的制剂B.每1ml相当于原药材2g的制剂C.每1g相当于原药材2~5g的制剂D.每1g相当于原药材1~2g的制剂E.每1g相当于原药材6g的制剂流浸膏剂的浓度是()。
张某为自己所有的房屋向甲保险公司投保了财产险.张某与邻居李某交恶,李某放火将张某的房屋烧毁。下列说法不正确的是:()
根据《会计人员继续教育暂行规定》,下列各项中,属于会计人员继续教育内容的有()。
不良贷款是指借款人未能按原定的贷款协议按时偿还()的贷款本息的贷款。
以下有关审计证据的说法中,正确的有()。
现实与虚构的_________让我们在《哈利.波特》系列电影中看到了一个虚幻与现实交错构成的现代伦敦。魔法与现代科技在一个_________的伦敦找到了奇妙的契合点。填入划横线部分最恰当的是()。
HaveChineseaudiencesonaveragespentmoretimewatchingentertainmentcontentonlineinthisuncommonyearwhenthebattleag
最新回复
(
0
)