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
Why were the Wright brothers able to succeed in an effort at which so many others had failed? Many explanations have been mentio
Why were the Wright brothers able to succeed in an effort at which so many others had failed? Many explanations have been mentio
admin
2011-02-28
44
问题
Why were the Wright brothers able to succeed in an effort at which so many others had failed? Many explanations have been mentioned, but three reasons are most often cited. First, they were a team. Both men worked congenially and cooperatively, talked incessantly about the possibility of manned flight, and served as a conscious source of inspiration and encouragement to each other.
Both were glider pilots. Unlike some other engineers who experimented with the theories of flight, they experienced the practical aspects of aerodynamics by building and flying in kites and gliders. They had realized from their experiments that the most serious challenge in manned flight would be stabilizing and maneuvering the aircraft once it was airborne. While others concentrated their efforts on the problem of achieving lift for take-off, they were focusing on developing a three axis control for guiding their aircraft.
In addition, the Wright brothers had designed more effective wings for the airplane than had been previously engineered. Using a wind tunnel, they tested more than two hundred different wing designs, recording the effects of slight variations in shape on the pressure of air on the wings. The data from theses experiments allowed the Wright brothers to construct a superior wing for their air craft. In spite of these advantages, however, the Wright brothers might not have succeeded had they not been born at precisely the opportune moment in history. Attempts to achieve manned flight in the early nineteenth century were doomed because the steam engines that powered the aircrafts were so heavy in proportion to the power that they produced. But by rite end of the nineteenth century, when the brothers were experimenting with engineering options, a relatively light internal combustion engine had already been invented, and they were able to bring the ratio of weight to power within acceptable limits for flight.
The word" incessantly" ( Para 1 ) could best be replaced by ______.
选项
A、confidently
B、constantly
C、intelligently
D、optimistically
答案
B
解析
由上下文推断,incessantly是“不休止”的意思,和constantly“坚持不懈地”意思上更为相近。
转载请注明原文地址:https://kaotiyun.com/show/F1kd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
【26】【42】
【26】【40】
【26】【28】
Whichfacilityisnotavailableintheapartmentbuilding?
Whatdoesthemanproposetodofirst?
WhatisMs.Bush’smainpurposeforthetrip?
Lifelearning(sometimescalledun-schoolingorself-directedlearning)isoneofthoseconceptsthatarealmosteasiertoexpla
ItwasfifteenpastnineasMariehurriedintotheofficebuildingwhereshewasgoingtoworkHerbushadinchedalongthroug
ItwasfifteenpastnineasMariehurriedintotheofficebuildingwhereshewasgoingtowork.Herbushadinchedalongthrough
WithinfifteenyearsBritainandothernationsshouldbewellonwiththebuildingofhugeindustrialcomplexesfortherecyclin
随机试题
A、Hewouldscratchthepaintoffitssurface.B、Hewouldtearitdownfirst.C、Hewouldmakesomerepairs.D、Hewouldrebuildit
男性,55岁。双下肢无力半年,右侧明显,近2个月行走不稳,右手不能扣钮扣,无外伤史,无发热。体格检查:颈背部无明显压痛,两上肢前臂、手及上臂尺侧皮肤感觉减退,右侧尤其明显,四肢肌张力增高,肱二头肌反射亢进,双侧膝踝反射亢进,右髌阵挛阳性,右巴彬斯基征阳性
上海某公司2013年9月份发生下列部分经济业务:(1)开出现金支票5000元,预付厂部办公室主任差旅费。记账凭证上编制的会计分录如下:借:管理费用5000贷:库存现金5000并且在登记账簿时,将“管理费用”和“库存现金”账户的金额登记为500元。
甲公司为居民企业,自行计算的应纳税所得额为85万元。2019年有关收支情况如下。(1)销售收入为600万元。(2)已计入成本费用中实际支付的合理工资为100万元,计提工会经费6万元,职工福利费18万元,计提2.2万元的职工教育经费并全部列支。(3)管
行政管理相对于其他社会管理所独有的两大特性是()。
如图3,这是尼德兰画家()的作品。
公安部设督察长,由公安部部长兼任。
下列行政制裁中属于行政处分的是()。
WashingtonMarch15-TheadministrationofPresidentCarlArlingtodaypredictedanothersixmonthsofslowGNPgrowthandrisi
Whentravelerslackanawarenessof【51】timeisregulatedinaforeigncountry,theycanexpecttofeelsomewhatdisoriented.Sin
最新回复
(
0
)