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
40
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、many
B、much
C、enough
D、necessary
答案
C
解析
本题的考点为形容词的区别,generate enough lift产生足够的升力。
转载请注明原文地址:https://kaotiyun.com/show/HUxd777K
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
ThepeoplefromtheMarscannotunderstandwhythepeopleontheEarthshouldcrowdthemselvesincities.Youareinvitedtowri
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodernsocietyhaschangedpeop
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicandtosociologiststhatmodernsocietyhaschangedpeop
【B1】Whatistherelationbetweenthecodeandculturewhichcreatesit,andwhichittransmitstothenextgeneration?Linguist
Themainproblempeoplemayencountertodayarisesfromthefactthat______.
PeopleintheUnitedStatesinthenineteenthcenturywere【C1】______bythe【C2】______thatunprecedentedchangeinthenatio
ReadthefollowingpassagecarefullyandthentranslatetheunderlinedsegmentsintoChinese.Yourtranslationshouldbewritten
TheSpringFestivalisatraditionalfestivalinChina,andChinesehavebeenaccustomedtocelebratingitathome.Butnowmore
HomingisoneofthemostimportantissuesconcerningChinesepeoplenow.Thefollowinggraphshowsthepriceofhousein1987a
ThedivorcerateinAmericahasreached
随机试题
论述全球化对中国的冲击和挑战以及应对策略。
创伤时,未确诊前应慎用
投资项目风险的起囚是经济活动结果的()。
沉井封底前自沉速率应小于()。
()杆件,可能存在失稳问题。
明码标价是指经营者收购、销售商品和提供服务时公开标示商品价格、服务价格等有关情况的行为。经营者不得在标价之外加价出售商品,不得收取任何未予标明的费用。根据上述定义。下列符合明码标价的是()。
34≤58YX3W∑5X895X≤3W9
一、注意事项1.本申论试卷重点测查应考者的阅读理解能力、综合分析能力、提出和解决问题能力、贯彻执行能力及文字表达能力。2.阅读给定资料参考时限为40分钟,作答参考时限为110分钟。3.仔细阅读给定资料,按照后面提出的“作答要求
环境化学效应是指在环境条件的影响下,物质之间的化学反应所引起的环境效果。以下现象属于环境化学效应的是()。
下列给定程序中,函数fun的功能是:读入一个字符串(长度<20),将该字符串中的所有字符按ASCⅡ码值升序排序后输出。例如,若输入″edcba″,则应输出″abcde″。请改正程序中的错误,使它能得出正确的结果。注意:不要改动main函数,不得增行或删
最新回复
(
0
)