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
2016-01-10
36
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.
A collision between an aircraft and one or more birds is known as a birdstrike. It usually happens when an aircraft is【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
(文章最后两句话提到In such cases it may not be possible to implement…measures whichare 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/styK777K
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
Howmanypeoplediedunderthelamivudinedrugtreatment?
TheMid-AutumnFestivalisanimportantfestivalinsomeAsiancountries.Becausethedateofthisfestivalissetaccordingto
Isthisreallythefatefacingeducatedwomen:eithernomarriageatallorthemarriagewithmorehousework?
Formanypeopletoday,readingisnolongerrelaxation.Tokeepuptheirwork,theymustreadletters,reports,tradepublication
Manystudentsfindtheexperienceofattendinguniversitylecturestobeaconfusingandfrustratingexperience.Thelecturerspe
HowmanyperformersjoinedtheWinterOlympicsopeningceremony?
TheEarthisnotcompletelyround.
AcrossAfrica,thetsetseflythreatensastaggering55millionspeopleandtheir【M1】______livestock.Theinsectsucksblooda
WhenIwasachild,myfamilyusedtogoonholidayeveryyeartovisitourrelativesinthenorth-eastofEngland.Oneofthem
—Forgottensomething?Icankeepaneyeonyourkidsifyouwanttogoandgetit.—_________Thankyouallthesame.
随机试题
增长量
刘家有一祖传清代名画,现为刘别鹤所有,2005年12月,刘别鹤在遗嘱中写明其死后由其子刘某继承该画。刘某的好友韩某多次向刘别鹤请求购买,被刘别鹤拒绝。由于刘别鹤年事已高,刘某遂与韩某订立该画的买卖合同,价款20万元,并约定待刘别鹤去世后将画交于韩某。201
与多层建筑地震作用有关的因素,下列哪项正确且全面?Ⅰ.抗震设防类别;Ⅱ.建筑场地类别;Ⅲ.楼面活荷载;Ⅳ.结构体系;V.风荷载
刑事责任主要包括( )。
关于工作分析的说法,正确的是()。
根据内部控制规范的要求,不相容职务应当相互分离。下列各项中,属于不相容职务的有()。
1940年,( )首先撰文分析弗洛伊德精神分析理论对社会工作专业的影响。
Ifeachmanagermakeshisusualspeech,themeetingwillbe______about45minutes.
对资本主义私有制的改造,马克思和恩格斯曾经设想过暴力没收、和平赎买两种形式,而和平赎买的必要性在于()
A、Economics.B、Business.C、History.D、English.C事实细节题。短文中提到,30年前,主修经济学和商业管理的学生仅占本科生比例的8%,而几乎12%的本科生是主修历史学的。即30年前历史专业比较受欢迎。
最新回复
(
0
)