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
There are two main things that make aircraft engineering difficult: the need to make every component as reliable as possible and
There are two main things that make aircraft engineering difficult: the need to make every component as reliable as possible and
admin
2012-07-17
40
问题
There are two main things that make aircraft engineering difficult: the need to make every component as reliable as possible and the need to build everything as light as possible. The fact that an aeroplane is up in the air and cannot stop if anything goes wrong makes it perhaps a matter of life or death that its performance is absolutely dependable.
Given a certain power of engine, and consequently a certain fuel consumption, there is a practical limit to the total weight of aircraft that can be made to fly. Out of that weight as much as possible is wanted for fuel, radio navigational (航行的,航运的) instruments, passenger seats, or freight (货物) room, and, of course, the passengers or freight themselves. So the structure of the aircraft has to be as small and light as safety and efficiency will allow. The designer must calculate the normal load that each part will bear. This specialist is called the "stress man". He takes account of any unusual stress that may be put on the part as a precaution (预防, 预防措施) against errors in manufacture, accidental damage, etc.
The stress man’s calculations go to the designer of the part, and he must make it as strong as the stress man says is necessary. One or two samples are always tested to prove that they are as strong as the designer intended. Each separate part is tested, then a whole assembly—for example, a complete wing, and finally the whole aeroplane. When a new type of aeroplane is being made, normally only one of the first three made will be flown. Two will be destroyed on the ground in structural tests. The third one will be tested in the air.
The stress man’s job is to calculate______.
选项
A、the amount of luggage each passenger may carry
B、what height the plane will fly at
C、how strong each part must be
D、how safe the plane is
答案
C
解析
本题是一道具体细节题。问压力师的工作是计算什么。利用查阅式阅读法,我们可以在文章的第二段最后几句话中找到答案。这部分指出,设计师必须计算每个部件将承受的正常负荷,这方面的专家被称为压力师,他把任何加给部件的非正常受力均纳入计算之列,以防止制造过程中的失误及意外事件所造成的损坏等。因此,本题的正确答案应是C“计算飞机每一部分需要有多大的承受力”。
转载请注明原文地址:https://kaotiyun.com/show/fhXO777K
0
在职攻硕英语联考
相关试题推荐
AbudgetapprovedbytheEuropeanParliamentfortheEuropeanEconomicCommunitywasdeclaredadoptedTuesdaydespiteopposition
AbudgetapprovedbytheEuropeanParliamentfortheEuropeanEconomicCommunitywasdeclaredadoptedTuesdaydespiteopposition
AbudgetapprovedbytheEuropeanParliamentfortheEuropeanEconomicCommunitywasdeclaredadoptedTuesdaydespiteopposition
Allbadthingsareinterconnected,andanyoneofthemis______tobethecauseofanyother.
Among169cases,thesmokers______85.79%,andtheratiobetweenmalesandfemalesis3.7to1.
EveryoneknowsthatEnglishdepartmentsareintrouble,butitisdifficulttoappreciatejusthowmuchtroubleuntilyoureadt
Ithappenseverysemester.AstudenttriumphantlypointsoutthatJean-JacquesRousseauisundermininghimselfwhenheclaims"
Shehashelpedthousandsofmenandwomen______withthingsthatbotherthemandthattheycouldnottalkaboutwithothers.
It’sdifficulttobegreatwithoutbeing______:adoctorshouldneverbelittleapatient’sconcerns,regardlessofhowtrivial
Manypeoplejudgethevalueofthingsbytheirpracticalityorusefulness.Whatisyouropiniononthistopic?Supportyourar
随机试题
Hetoldme______afraidbecauseIhaddonenothingwrong.
原方特别注名“不用姜”的方剂是()(1996年第44题)
无机结合料稳定基层的水泥材料应选用()的水泥。
下列关于可持续增长的说法中,正确的有()。
究竟什么是“庸俗、低俗、媚俗”?社会各界存在着不同的认识。“雅”本来是“夏”,指的是周王朝统治的核心地区,相当于我们今天说的“文化中心地区”。而“俗”指的是其他地区。我们不能说非文化中心地区的文化,就比中心地区“低下”,正像今天不能说一个四川人、广东人、东
有以下程序#defineF(X,Y)(X)*(Y)main(){inta=3,b=4:printf("%d\n",F(a++,b++));}程序运行后的输出结果是()。
税务员小刘接到上级指派的整理有关减免税政策的任务,按照下列要求帮助小刘完成相关的整理、统计和分析工作:自A3单元格开始,单独生成一个名为“数据透视总表”的数据透视表,显示2006~2015年(含)十年间按“收入种类”划分的减免政策数量,年份自左向右从高
将高级语言编写的程序翻译成机器语言程序,所采用的两种翻译方式是
TheMysteryoftheNazcaLines[A]IfyouvisitthePeruviancoastaldesertfromnorthtosouth,youwillnotethatsporadica
HowYourLanguageAffectsYourWealthandHealthA.)Doesthelanguagewespeakdeterminehowhealthyandrichwewillbe?Newre
最新回复
(
0
)