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
2013-11-20
86
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.
Birdstrikes 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 bird strike. It usually happens when an aircraft is close【R1】______, and may result in significant damage of the aircraft or loss of the aircraft and【R2】______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【R3】______. Local authorities need to take care when deciding on【R4】______. 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【R5】______in order to bring about changes in land use.
【R1】
选项
答案
to the ground
解析
(文章第一段第二句提到but most of them happen when all aircraft is relatively close to theground。“所有这些飞行事故的发生都是在飞机接近地面的时候。”)
转载请注明原文地址:https://kaotiyun.com/show/3cAK777K
本试题收录于:
B类竞赛(英语专业本科专科)题库大学生英语竞赛(NECCS)分类
0
B类竞赛(英语专业本科专科)
大学生英语竞赛(NECCS)
相关试题推荐
Whatlettershouldreplacethequestionmark?
Whatistheincreasebetweenthetwoanti-smokingcampaigns?
MyfriendsandIenjoydoingmanyofthesamethings.Inthatrespect,wehavealot______.
Makingagoodfirstimpressionisimportantforbuildingrelationshipswithotherpeople.Inbusinessnetworking,apositivefir
Theideaofafishbeingabletogenerateelectricitystrongenoughtolightlampbulbs—oreventorunasmallelectricmotor—is
anxiousabout,strong,suggest,instruct,which,especial,whether,applyto,all,both,great,formWorkingouttomusicca
Americansareproudoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform.Whyareunifor
Ofalltheareasoflearningthemostimportantisthedevelopmentofattitudes.Emotionalreactionsaswellaslogicalthought
对于一个公司来说,能跟上市场的发展变化是很重要的。(keeppacewith)
Thegamewascancelledbecausemostoftheteammembers________amatchwithoutastandardcourt.
随机试题
球面x2+y2+z2=4a2与柱面x2+y2=2ax所围成的立体体积V=()
A.外感时邪,引动伏痰B.感受风邪,肺气失宣C.外感时邪,肺气上逆D.禀赋不足,胎毒内蕴E.肺脾气虚,痰浊阻肺百日咳恢复期咳而无力的病机是()
甲、乙为好朋友,甲委托乙代其购买一批货物,乙明确表示不收取报酬。根据《合同法》,下列有关甲、乙权利义务的说法中错误的有()。
根据行政法理论和有关规定,()属于税务行政许可范畴。
某酒类股份有限公司为增值税一般纳税人,2016年2月发生以下业务:(1)为某企业特制一批白酒,用自产原浆白酒500斤勾浆68度白酒980斤,无同类白酒的销售价格,68度白酒生产成本为240元/斤。(2)用外购已税原浆白酒勾兑56度白酒3000斤,销售了
“环肥燕瘦”十分生动地说明了审美现象具有()
老张和老王两个人在周长为400米的圆形池塘边散步。老张每分钟走9米,老王每分钟走16米。现在两个人从同一点反方向行走,那么出发后多少分钟他们第二次相遇?
栈和队列的共同点是( )。
在窗体上画一个名称为Command1的命令按钮,并编写如下程序:FunctionFun(x) y=0 Ifx
A、Whyhumanscry.B、Howtorelieveourselves.C、Howanimalscry.D、Whenpeoplecry.A主旨题。议论文需注意首句话,此文章第一句“Whydowecry?”就点明了主题:
最新回复
(
0
)