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
71
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.
【B13】
选项
A、dynamics
B、properties
C、indicator
D、charisma
答案
B
解析
逻辑关系题。选项的意思分别为[A]“动态”;[B]“性质,属性”;[C]“标志”;[D]“气质,气概”。本句说的是“如果有一种材料可以被塑造成纳米毛发,那么它们将具有与壁虎脚趾相同的 ________ ”,根据前后文,科学家们实质上是通过研究壁虎脚趾吸力强大的原理,进而制造出与其脚趾上的纳米毛发相似性质的材料,因此答案选[B]。
转载请注明原文地址:https://kaotiyun.com/show/7p1Z777K
0
考研英语一
相关试题推荐
ManysignspointtoagrowinghistoricalconsciousnessamongtheAmericanpeople.Itrustthatthisisso.Itisusefultoremem
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,【C1】______this
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
ThehomelessmakeupagrowingpercentageofAmerica’spopulation.【C1】______,homelessnesshasreachedsuchproportionsthatlo
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Muchoftheworldshouldgoonadietin2014.Morethanathirdofadults【C1】______wereestimatedtobe【C2】______orobesein20
SupposeyourfriendBarbaraisgraduatingfromYaleUniversity.Writeheranemailto1)congratulateher,and2)wishh
Fewdisciplinesaxesostronglyassociatedwithasinglefigure:EinsteininphysicsandFreudinpsychology,perhaps.ButNoam
Lastweekwasthebeginningofstandardizedtesting"pre-season"atmyschool.【F1】It’snothingcomparedtowhathappensinthe
[A]Shiftwork[B]Communication[C]Forward-lookingrecruitment[D]Teammotivation[E]Flexiblescheduling[F]
随机试题
根据《碾压式土石坝施工规范》,坝体防渗土料(砾石土)现场鉴别控制项目中包括()。
在数字出版产品制作过程中,内容整合需要遵循的原则有()。
权力型对手
患者肢体关节疼痛较剧,痛有定处,得热痛减,遇寒痛增,苔薄白,脉弦紧。治疗应首选
根据外商投资企业法律制度的规定,下列关于合营企业的表述中,不正确的是()。
据专家们说,从销密的卫星数据中整理出新的海底图,图上能清晰显示山脊、海沟、火山以及可能蕴藏着矿石、石油和天然气的沉积地。如果利用船上最好的技术收集整个海底的同类信息,可能要125年才能完成。这些海底图有助于改进影响气候模式和全球气候变暖的洋流和海洋流量的模
社会意识是对社会存在的反映,主要是对()。
由于现代女性教育程度提升,萌生独立意识,自主性高,而婚姻并非女性的唯一道路,所以晚婚的单身女性越来越多,这部分女性被称为“延婚族”。根据上述定义,下列属于延婚族的是()。
以下对“深环境论”的解说,正确的一项是______。根据全文的信息,以下分析正确的一项是______。
下列例子中表现了否定之否定规律的是()
最新回复
(
0
)