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
57
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、stand
B、sustain
C、understand
D、withstand
答案
D
解析
本题的考点为动词的词义辨析
转载请注明原文地址:https://kaotiyun.com/show/9Uxd777K
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
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplegotogetaneducation.Nevertheless,ithasbeensaid
Duringtheearlyperiodoftheearth’shistory,theweatheronearthapparentlyfluctuatedbetweenbrightsunandshowers.Inr
In1990,thenumberofjobshavingnothingtodowithcomputersintheUniteStateswillbereducedto______.
PeopleintheUnitedStatesinthenineteenthcenturywere【C1】______bythe【C2】______thatunprecedentedchangeinthenatio
SciencewriterTomStandagedrawsaptparallelsbetweenthetelegraphandthegemoflate20thcenturytechnology,theInternet.
ReadthefollowingpassagecarefullyandthentranslatetheunderlinedsegmentsintoChinese.Yourtranslationshouldbewritten
ThedivorcerateinAmericahasreached____________________________________
Themorewomenandminoritiesmaketheirwayintotheranksofmanagement,themoretheyseemtowanttotalkaboutthingsforme
ThedivorcerateinAmericahasreached
随机试题
人参的下列配伍哪项是正确的()(1997年第142题)
源结点与目标结点之间采用交换技术实现其连接。通常有三种交换方式:电路交换、( )、包交换。
《食品卫生法》对人的效力原则是
关于革兰阳性菌
按《建筑桩基技术规范》(JGJ94—94),对于桩身周围有液化土层的低桩承台,关于液化土层对单桩极限承载力影响的分析中,()是正确的。
深基坑支护与降水工程、模板工程、脚手架工程的施工专项方案必须经下列哪些人员签字后实施?①经施工单位技术负责人;②总监理工程师;③结构设计人;④施工方法人代表。
英国的保险公估人大多属于( )。
全面准确地理解和把握“一国”与“两制”的关系,应在坚持“一国”基础上,实现“两制”之间的和谐相处、相互促进。为此,必须做到
编写函数fun,其功能是:根据以下公式计算S,并将计算结果作为函数值返回,n通过形参传入。例如,若n的值为11时,函数的值为1.833333。注意:部分源程序给出如下。请勿改动主函数main和其他函数中的任何内容,仅在函数f
DearSir/Madam,Inresponsetoyouradvertisementinyesterday’sTimeEducationalSupplement,Iwouldliketoapplyforthe
最新回复
(
0
)