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
34
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.
【R5】
选项
答案
measures
解析
(文章最后一段最后两句话提到In such cases it may not be possible to implement…measureswhich 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/DcAK777K
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
Readthefollowingadvertisementandthenwritealetterofapplication.Yourlettershouldbeatleast120words.Donotinclud
Whatistheincreasebetweenthetwoanti-smokingcampaigns?
WhatactiondoesMicrosoftintendtotake?
被多家公司雇用的这位顾问是财务方面的资深人士。(定语从句,knowledgeableabout)
Makingagoodfirstimpressionisimportantforbuildingrelationshipswithotherpeople.Inbusinessnetworking,apositivefir
Whatistheprobablerelationshipbetweenthetwospeakers?
anxiousabout,strong,suggest,instruct,which,especial,whether,applyto,all,both,great,formWorkingouttomusicca
Americansareproudoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform.Whyareunifor
Iwentaroundsniffingattheotherdoors,tryingtofindoutwherethesmellwascomingfrom.Ifinallydiscovereditwas______
A、10B、15C、20D、30B这道题是典型的数字类题型,考查数字的分析与计算。对话录音内容非常贴近生活,询问求职广告的花费。录音中没有直接给出答案,需要参赛者在听的同时将对话中出现的所有数字和其对应的对象用笔记录下来,然后进行简单的计算。从
随机试题
下列哪项不是左向右分流型先天性心脏病的共同特点
男性,33岁,被自行车撞伤右膝外侧,拍片证实为腓骨小头骨折,检查发现踝关节不能主动背伸,可能并发
女性,30岁,经检查诊为甲状腺功能亢进,未做进一步治疗,现欲行手术治疗,查体:心率100/min,血压120/76mmHg。甲状腺术后因血管结扎线脱落出血导致呼吸困难,此时适当的处理是
行针的辅助手法不包括
某化妆品生产企业位于市区,为增值税一般纳税人,2014年10月发生以下各项业务:(1)从国外进口一批化妆品,成交价1380000元,相关费用20000元,支付货物进口后的保险费用20000元。在自海关运往单位的途中,因管理不善损失了35%的化妆品,已经申
下列属于商业银行客户风险内生变量中盈利能力指标的是()。
根据《支付结算办法》的规定,银行汇票的提示付款期限是()。
加拿大的首都是(),是世界上最寒冷的首都之一。
设二维随机变量(X,Y)的概率密度为求:(I)(X,Y)的边缘概率密度fX(x)fY(y);(Ⅱ)Z=2X—Y的概率密度fZ(z);(Ⅲ)
Nisbetween1and99,inclusive.What’sthepossibilityofN(N+1)beingthemultiplesof3?
最新回复
(
0
)