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
22
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、in order
B、in place
C、in spite
D、instead
答案
D
解析
本题考的是对副词及短语的辨析。根据上下文,此处需要instead代替,顶替;如:If there is no coal, oil can be used instead.如果没有煤,可以用石油来代替。
转载请注明原文地址:https://kaotiyun.com/show/EUxd777K
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
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodernsocietyhaschangedpeop
In1990,thenumberofjobshavingnothingtodowithcomputersintheUniteStateswillbereducedto______.
Whichwordbestdescribesthelawyers’predictionofthechangeindivorcerate?
Whenitcomestogenderrolesinfamilies,itseemsthemorethingschange,themoretheystaythesame.Forthefirsttime,the
Thehumanbeinglongsforasenseofbeingaccomplished,ofbeingabletodothings,withhishand,withhismind,withhiswill
BoeingCo’sSonicCruiser,aproposedfasterairliner,wouldbemostlyblendedmaterial,programdirectorWaltGillettesaidrec
BoeingCo’sSonicCruiser,aproposedfasterairliner,wouldbemostlyblendedmaterial,programdirectorWaltGillettesaidrec
BoeingCo’sSonicCruiser,aproposedfasterairliner,wouldbemostlyblendedmaterial,programdirectorWaltGillettesaidrec
BoeingCo’sSonicCruiser,aproposedfasterairliner,wouldbemostlyblendedmaterial,programdirectorWaltGillettesaidrec
随机试题
方其系燕父子以组。方:
帕金森病临床表现中下列哪项不对
商业汇票的付款地为其相对记载事项。
基金管理费率通常与基金规模成(),与风险成()。
在固定资产投资决策中,当税法规定的净残值和预计净残值不同时,终结期现金流量的计算一般应考虑所得税的影响。()
下图为某区域图,读图完成问题。造成③、④两地荒漠景观的共同因素是()。
设平面区域D由曲线y=x2,y=4x2与直线y=1围成.求D的形心的纵坐标y;
以下程序的功能是:生成20个200到300之间的随机整数,输出其中能被5整除的数并求出它们的和。请填空。PrivateSubCommand1_Click()Fori=1To20x=
A、TRUEB、FALSEB
HowtoConductEmploymentInterviewsGenerallyspeaking,thepurposeofemploymentinterviewsarethree-fold:a.tomatchac
最新回复
(
0
)