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
With Airbus’s giant A380 airliner about in to take to the skies, you might think planes could not get much bigger — and you woul
With Airbus’s giant A380 airliner about in to take to the skies, you might think planes could not get much bigger — and you woul
admin
2011-03-22
24
问题
With Airbus’s giant A380 airliner about in to take to the skies, you might think planes could not get much bigger — and you would be right. For a given design, it turns【21】, there comes a point where the wings become too heavy to generate【22】lift to carry their own weight.【23】a new way of designing and making materials could【24】that problem. Two engineers【25】University College London have devised an innovative way to customise and control the【26】of a material throughout its three-dimensional structure.
In the【27】of a wing, this would make possible a material that is dense, strong and load-bearing at one end, close to the fuselage,【28】the extremities could be made less dense, lighter and more【29】. It is like making bespoke materials,【30】you can customise the physical properties of every cubic millimetre of a structure.
The new technique combines existing technologies in a(n)【31】way. It starts by using finite-element-analysis software, of the type commonly used by engineers,【32】a virtual prototype of the object. The software models the stresses and strains that the object will need to【33】throughout its structure. Using this information it is then【34】to calculate the precise forces acting on millions of smaller subsections of the structure.【35】of these subsections is【36】treated as a separate object with its own set of forces acting on it — and each subsection【37】for a different microstructure to absorb those local forces.
Designing so many microstructures manually【38】be a huge task, so the researchers apply an optimisation program, called a genetic algorithm,【39】This uses a process of randomization and trial-and-error to search the vast number of possible microstructures to find the most【40】design for each subsection.
选项
A、sample
B、case
C、condition
D、situation
答案
B
解析
本题的考点为名词的近义辨析。the case of a wing机翼的情况。
转载请注明原文地址:https://kaotiyun.com/show/LUxd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantininterpersonalcommunicationis
Whethertheeyesare"thewindowsofthesoul"isdebatable;thattheyareintenselyimportantininterpersonalcommunicationis
【B1】Whiletherearealmostasmanydefinitionsofhistoryastherearehistorians,modernpracticemostcloselyconformstoone
【B1】Whatistherelationbetweenthecodeandculturewhichcreatesit,andwhichittransmitstothenextgeneration?Linguist
Societywasfascinatedbyscienceandthingsscientificinthenineteenthcentury.Greatbreakthroughsinengineering,theuseo
TheSpringFestivalisatraditionalfestivalinChina,andChinesehavebeenaccustomedtocelebratingitathome.Butnowmore
Whichwordbestdescribesthelawyers’predictionofthechangeindivorcerate?
Themorewomenandminoritiesmaketheirwayintotheranksofmanagement,themoretheyseemtowanttotalkaboutthingsforme
ReadthefollowingtextcarefullyandthentranslatetheunderlinedsegmentsintoChinese.Yourtranslationshouldbewritte
ThedivorcerateinAmericahasreached
随机试题
下列组分中,在FID中有响应的是()。
产品定位的客观依据。
麝香主治的神昏证为
自发性气胸常用的胸腔穿刺抽气减压的部位是()
患者,女,20岁。头部外伤后2天。患者受伤时立即昏迷,20分钟后清醒,头痛。呕吐2次。半小时前又出现昏迷。检查:右侧瞳孔散大,对光反射消失,左侧肢体瘫痪。目前最根本的处理是
建设工程实行施工总承包的,由( )单位负责收集,汇总各分包单位形成的工程档案。
2021年4月1日,上海的甲公司与北京的乙公司签订了一份买卖合同,约定:甲公司向乙公司购买1000吨化工原料,总价款为200万元;乙公司在合同签订后1个月内交货,甲公司在验货后7日内付款。双方没有明确约定货物的交付地点。2021年4月2日,甲公司
约翰为在华工作的外籍人士,在中国境内无住所,其所在国与中国签订了税收协定,约翰已经在中国境内居住满5年,2014年是在中国境内居住的第6年且居住满1年,取得收入如下:(1)每月从中国境内任职企业取得工资收入39800元,另每月以实报实销方式取得住
一个不尊重他人的人不会得到他人的尊重,一个不会反省的人不会真正地尊重他人。张三是一个会反省的人。如果上述断定为真,那么以下哪项一定为真?
最早表述“中学为体,西学为用”这一概念的是()。
最新回复
(
0
)