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
72
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.
【B15】
选项
A、separated
B、distributed
C、measured
D、applied
答案
C
解析
逻辑关系题。选项的意思分别为[A]“分离”;[B]“分发”;[C]“测量”; [D]“申请,应用”。上一段中模仿壁虎脚趾纳米毛发的构造制造新材料的尝试是纳米技术的研究领域的一个例子,结合空格所在这一句话的前后文,这句话要表达的是正在研究的这项新技术的度量值,“正在出炉的技术可以以几个纳米为单位被测量”,因此答案选[C]。
转载请注明原文地址:https://kaotiyun.com/show/Op1Z777K
0
考研英语一
相关试题推荐
In1924America’sNationalResearchCouncilsenttwoengineerstosuperviseaseriesofexperimentsatatelephone-partsfactory
In1924America’sNationalResearchCouncilsenttwoengineerstosuperviseaseriesofexperimentsatatelephone-partsfactory
In1924America’sNationalResearchCouncilsenttwoengineerstosuperviseaseriesofexperimentsatatelephone-partsfactory
Manytheoriesconcerningthecausesofjuveniledelinquency(crimescommittedbyyoungpeople)focuseitherontheindividualor
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Teachersneedtobeawareoftheemotional,intellectual,andphysicalchangesthatyoungadultsexperience.Andtheyalsoneed
Shortstoriesareduearevival.Inrecentyears,therehavebeencritically【C1】______collectionsbyAmericanwriterssuchasLy
Mostonlinefraudinvolvesidentitytheft,whichiswhybusinessesthatoperateonthewebhaveakeeninterestindistinguishin
随机试题
罚款通常属于()
肝性脑病的发病机制学说中较为全面的是
朱砂常用于治疗的病症有
管形导体在无冰无风正常状态下的挠度,一般不大于()D(D为导体直径)。
在废水处理系统中,平流式隔油池的结构与()基本相同。
财政部门有权对会计师事务所出具审计报告的程序和内容进行监督。()
1951年中央人民政府政务院公布________,明确高等教育是作为教育基础上的更高层次教育。
对幼儿来说,排序比对物体分类要简单一些。()
纵火,是指明知会造成他人或国家、集体财物损失或威胁他人生命安全,故意点火。下列行为属于纵火行为的是:
Youcanchoosefromthreeplanstosuityourpersonalmobilityneedsand,ifyou’remarried,youandyour______canbenefitfrom
最新回复
(
0
)