首页
登录
职称英语
[originaltext]On Monday we talked about insects, and how they gather food. Toda
[originaltext]On Monday we talked about insects, and how they gather food. Toda
游客
2024-01-05
5
管理
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://www.tihaiku.com/zcyy/3335389.html
相关试题推荐
Choosethecorrectletter,A,BorC.[br]Togatherdata,theprofessorasksJa
Themarketisnowsituated[br][originaltext]Youwillhearsomeonetalkingon
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[br][originaltext]You
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[br][originaltext]You
WhydidAnitaandLeechoosetotalkaboutJohnChapman?[originaltext]Youwill
WhatdoesthecharityForwardthinkingdo?[br][originaltext]Youwillhearar
WhatdoesthecharityForwardthinkingdo?[br][originaltext]Youwillhearar
WhatdoesthecharityForwardthinkingdo?[originaltext]Youwillheararadiop
WhatisChloeconcernedabout?[br][originaltext]Youwillheartwopeoplecall
WhatisChloeconcernedabout?[br][originaltext]Youwillheartwopeoplecall
随机试题
[originaltext]W:Sitdownplease,Mr.Johnson.M:Thankyou.W:Ihavereadyou
Initsvariousformsfromfictiontodocumentary,themotionpicturehasbecom
(1)IwentbacktotheDevonSchoolnotlongago,andfounditlookingoddly
NovemberisDiabetesEyeHealthMonth,andthat’sjustoneofthereasonsto
Duringastateofdeeprelaxation,severalphysiologicalchangestakeplace
尿毒症患者必有的症状为A.少尿 B.高血压 C.恶心呕吐 D.贫血 E.
患者,女性,29岁,已婚。经期前后不定,量少,色淡,质稀,头晕耳鸣,腰痛如折,夜
隔离开关分合闸位置“双确认”中微动开关是采用电缆通信方式将隔离开关微动开关位置信
《中华人民共和国执业医师法》第二十二条规定的医师的法律义务同时也是其基本的道德义
《环境管理体系要求及使用指南》中,环境目标及其实现的策划部分包括的内容有( )
最新回复
(
0
)