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
外语
A、Chemists. B、Architects. C、Airline pilots. D、Auto designers. BQ:?according?to?the?speaker,?who?might?benefit?from?studying?spid
A、Chemists. B、Architects. C、Airline pilots. D、Auto designers. BQ:?according?to?the?speaker,?who?might?benefit?from?studying?spid
admin
2004-12-28
131
问题
On Monday we talked about insects, and how they gather food. Today I’d like to talk about the common garden spider and how it captures its prey with net-like structure it first produced almost 200 million years ago. I mean, of course a spider web. What’s interesting is why such a delicate structure isn’t hard. When a fast-flying insect crashes into it, and compared with the spider, these insects can be huge and really heavy. In fact capturing a large insect in a spider web could be compared to capture an airplane in a fishing net. So, how can the web offset such a shock without breaking? is it just because the thread is made of so strong? well, experts analyze spider webs using a computer program designed when an insect crashed and caught and they found the structure of the web, the way of threads connected together helps balance the strength and tensions caused by the impact and spread them all across the web this saves the web from being destroyed and by the way, suggests some creative new ideas that human might use in designing buildings. The biggest surprise, though, is the role of air resistance in cushioning the shock of collision. The computer model showed that dragging a tightening thread from a spider web through the air is a lot like pulling a heavy rope through water. And since air resistance acts on many threads all across the web its amazing effect that multiplies many times. And this definitely helps the web survive the impact
选项
A、Chemists.
B、Architects.
C、Airline pilots.
D、Auto designers.
答案
B
解析
Q:?according?to?the?speaker,?who?might?benefit?from?studying?spider?webs??
转载请注明原文地址:https://kaotiyun.com/show/gp8O777K
0
托福(TOEFL)
相关试题推荐
LostforWordsManyminoritylanguagesareonthedangerlistIntheNativeAmericanNavajonation,whichsprawlsacross
ToptipsonhowtogetfurtherupthecareerladderMovingjobsisnolongerquiteaseasyasitwasjustacoupleofyearsago,
Youshouldspendabout20minutesonQuestions14-26whicharebasedonReadingPassage2below.ITWASthesummer,scientistsn
ElephantCommunicationO’Connell-Rodwell,apostdoctoralfellowatStanfordUniversity,hastravelledtoNamibia’sfirst-ev
Thereisa______at13WardrockPlace.______mightofferdiscountedaccommodationduringlowseasons.
Completethesentencesbelow.WriteNOMORETHANTHREEWORDSforeachanswer.Rainfallisausefulsourceofwaterunlessthere
Completethesentencesbelow.WriteNOMORETHANTWOWORDSforeachanswer.Duringtheflight,______facilitieshelpedhimdistr
Completethenotesbelow.WriteNOMORETHANTWOWORDSforeachanswer.TheArgussystemDevelopedbyRo
Thefluoroscopemakes______formedicaldoctorstoviewasilhouetteofthebonesandinternalorgansofapatient’sbody.
随机试题
关于儿童体液分布特点的描述,正确的是
恶性肿瘤化学治疗药品按作用原理分类为________、________、________、________、________、________、________和________。
夜间阵发性呼吸困难最常见于
白果在定喘汤中的作用是()
郭某是一位知名作家,2014年取得以下收入:(1)4月,出版一本小说取得稿费60000元。(2)7月,将境内一处住房出租,租赁期限1年,月租金4000元,当月发生修缮费1200元(不考虑其他税费)。(3)9月,应邀出国访
下列关于核设施退役与环境治理新技术的说法,错误的是:
除了读书之外,同知心的朋友通信,有时也教我感到一点兴奋。因为写信时可以上天下地的无所不谈,谈的话虽然都不关重要,而且大都是杂乱无章,然而不必像对社会说话时要打起什么腔调。也不必像做学术论文时必须严密地构思。有什么话便说什么,想到那里,笔便写到那里,正是个性
Howdidthemangetthetickettotravelintospace?
As【B1】______learnmoreabouthowchildren’sintelligencedevelops,theyareincreasingly【B2】______bythepowerofparents.The
TheNewOldAgeA)TheJapaneseseniorcitizenswhofoundedJeebaknewtheyweremakinghistorywhentheycoinedtheircom
最新回复
(
0
)