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
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruis
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruis
admin
2013-02-03
30
问题
Collision between an aircraft and one or more birds is termed a bird-strike. Pilots sometimes record a birdstrike while at cruising altitudes, but most of them happen when an aircraft is relatively close to the ground, usually in proximity to an airport and during the circling, descent to land or take-off phases of a flight.
Bird-strikes may cause significant damage to an aircraft and/or, if the birds are ingested into a jet engine, a significant and sudden loss of power. If this were to happen during take-off or initial climb of a fully loaded passenger aircraft the results could be catastrophic—loss of the aircraft and the lives of those on board. Any bird is a potential hazard to aircraft and this is especially true as bird numbers and bird size increase.
Unfortunately airports themselves can be attractive to birds-rodents, insects and other small animals are a food source often found in flat grassed areas such as the runway strips. Even so, this problem can be reduced by careful habitat management or bird harassment techniques practised by airport maintenance and safety personnel.
Further problems may arise because the airport is located on bird migration routes. These may have existed prior to the airport site selection—but may not have been taken into account because the problem was not understood at the time—or have only been recently established because the birds have found an attractive new food source. Care needs to be taken by local authorities in deciding the location of rubbish tips, or when permitting other land uses that may be attractive to birds in this way. Of course these effects cannot always be anticipated with certainty since birds such as gulls have been recorded as travelling 50 kilometres or more from their roosting area to an attractive food source.
Agricultural uses may be thought desirable because they are compatible with high levels of noise exposure, but they can have an adverse effect on air-craft operations if birds are attracted during seeding or crop cultivation. Birds may also be attracted to pig farms where garbage is used as fodder. Even tree plantings can present a hazard if the species provides an attractive food source or nesting habitat.
Local authority planning schemes often apply strict controls on developments such as abattoirs, cattle feed lots, grain handling, piggeries, canals and marina developments, fish farms, and suchlike. In most cases these uses will not be permitted without a full environmental study. That study should be required to deal with the question of likely bird hazards if the proposed location is in proximity to an airport.
In some instances it may be necessary to consider ways of managing a particular land use in order to reduce its attractiveness to birds, for example the adoption of land-fill measures at garbage tips, or enclosed rather than open-air activity. Specialist ornithological opinion may be necessary. In such cases it may not be possible to implement immediate changes in land use, but this should not inhibit the adoption of long-term measures which are designed to achieve this.
Summary:
A collision between an aircraft and one or more birds is known as a birdstrike. It usually happens when an aircraft is【71】, and may result in significant damage of the aircraft or loss of the aircraft and【72】of passengers and crew if they occur during take-off or initial climb. Because birds can find plenty food in flat grassed areas, airports are especially attractive to birds. However, the danger can be minimized by【73】. Local authorities need to take care when deciding on【74】It is suggested that a full environmental study should be made before making plans of developments on the land in proximity to an airport. Local authorities should get advice from specialists and take【75】in order to bring about changes in land use.
选项
答案
measures
解析
文章最后两句话提到In such cases it may not be possible to implement…measures which are designed to achieve this.摘要中可以概括为measures。
转载请注明原文地址:https://kaotiyun.com/show/BPyK777K
本试题收录于:
A类竞赛(研究生)题库大学生英语竞赛(NECCS)分类
0
A类竞赛(研究生)
大学生英语竞赛(NECCS)
相关试题推荐
Aletterofapplicationisasalesletterinwhichyouarebothsalespersonandproduct,forthepurposeofanapplicationisto
SummaryListentothepassage.Forquestions26—30,completethenotesusingnomorethanthreewordsforeachblank.Identityt
Democracyisnotanewconception.TheancientAthenians【M1】______hadademocraticsystem.TheirdemocracywasthesameasAme
Youngpeopleareinevitablyattheleadingedgeofchangeandinnovationandthetravelindustryisnoexception.Youngpeopleth
Oneofthemostpowerfulspiritualawakeningsyoucanhaveistomakepeacewithyourmistakes.Itisalsoaguaranteedwaytobe
Thereisnothingworsethansomeonewhoisalwayslate.Latenesscanbeacharmingeccentricity—foralittlewhile.Thetroubleis
BeforeIagree__________yoursuggestion,I’dliketoknowwhatI’m__________myselfinfor.
Australiais【21】driestcontinentinthisworld.TheevaporationrateofrainfallinAustraliais【22】.Thereasonforrapid
Thephysicalfitnessinstructor’scourseisofferedasa【21】Thisemploymentmustbe【22】tosportsadministration.Forthe【23】weo
(81)具体说,信息化主要是反映在沟通手段的网络化,也就是所谓的网络经济。这网络就是指由卫星、光纤、电缆和电话线路把世界各个角落联系到一起的电脑网络。(82)只要用鼠标一点,在地球另一端的信息马上就会以每秒钟绕地球七周半的光速跑到你的电脑荧光屏上。
随机试题
氨中毒引起肝昏迷的主要机理是干扰大脑的
关于小脑幕切迹疝的临床表现说法错误的是
细菌的特殊结构不包括()。
男,36岁,左上后牙食物嵌塞痛2周。检查:边缘嵴处色暗,邻面探及龋洞,有酸痛感,叩痛(±),龈乳头探出血,牙周探诊深度2~3mm。颊面颈部见褐色斑,探粗糙感,温度测验正常。X线片示龋损达牙本质浅层,未见异常。的诊断是
患者男性,21岁,因突发剑突下钻顶样剧烈疼痛而入院,自诉疼痛呈间歇性,发作时疼痛剧烈,辗转不安,大汗淋漓,可突然自行缓解,缓解期无任何症状。体检示剑突下有轻度深压痛。WBC11.5×109/L。为明确诊断,应首选的检查是
患者,男性,50岁。3个月前因车祸导致颅脑损伤昏迷入院。经积极抢救,目前生命体征平稳,但仍然处于昏迷状态,大小便失禁。护士为患者进行口腔护理时,以下哪项是错误的()
最基本的光纤通信系统由()组成。
期货公司会员的客户管理和服务制度的核心是()。
根据我国法律法规的规定,税后利润应该首先()。
VisualBasic集成环境由若干窗口组成,其中不能隐藏(关闭)的窗口是( )。
最新回复
(
0
)