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
39
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://jikaoti.com/ti/iQtMFFFM
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
Eachoftheninesquaresmarked1Ato3Cinthegridshouldincorporateallthelinesandsymbolsthatareshowninthesquares
Everyartistknowsinhisheartthatheissayingsomethingtothepublic.Notonlydoeshewanttosayitwell,buthewantsit
Televisionsenablesustoseethingshappenalmostattheexactmoment______.
somepeoplepreferworkoractivitiesthatmainlyinvolveworkingwithpeople.Otherschooseworkoractivitiesthatmainlyinvo
Whichofthesecubescannotbeformedfromthisweb?
Manyayoungpersontellsmehewantstobeawriter.Ialwaysencouragesuchpeople,butIalsoexplainthatthere’sabigdiff
anxiousabout,strong,suggest,instruct,which,especial,whether,applyto,all,both,great,formWorkingouttomusicca
Ofalltheareasoflearningthemostimportantisthedevelopmentofattitudes.Emotionalreactionsaswellaslogicalthought
Ofalltheareasoflearningthemostimportantisthedevelopmentofattitudes.Emotionalreactionsaswellaslogicalthought
小王常常工作到深夜,希望能赶上计算机技术的最新发展。(keeppacewith)
随机试题
由子宫颈到骨盆侧壁的韧带是
根据《标准施工招标文件》,由施工承包单位提出的索赔按程序得到了处理,且施工单位接受索赔处理结果的,建设单位应在作出索赔处理答复后()天内完成赔付。
钢结构焊接中,可以引弧的构件是()。
负债的特征是()。
下列各项中.免征或不征契税的有()。
依照法律规定冻结存款、汇款的,作出决定的行政机关应当在()日内向当事人交付冻结决定书。
当前我国正处于人口结构高速转变的时期,农村人力资源开发将需要同时面临“农村劳动力转移的难度加大”与“农村劳动力存量的整体素质趋于降低”两大问题。从农业农村发展的要求出发,今后一个时期,开发农村人力资源,优化农村人力资本结构必须着眼于提升农村人力资源的自我发
Shegota______jobwhileshewaswaitingtogototheuniversity.
村民委员会成员每届任期(),可以连选连任。
求直线L:在平面Π:x-y+2z-1=0上的投影直线L0的方程,并求L0绕y轴旋转一周所成曲面的方程。
最新回复
(
0
)