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  3. In June 1956 a TWA Constellation collide

In June 1956 a TWA Constellation collide

题库2022-08-02  38
问题 In June 1956 a TWA Constellation collided with a United Air Lines DC-7 over the Grand Canyon in Arizona,killing all 128 people on both aircraft.At the time it was the worst ever airline disaster Struggling with outdated technology and a post-war boom in air travel overworked air-traffic controllers failed to spot that the planes were on a collision course.（1）With that system again struggling to keep pace with demand,Donald Trump thinks it is time to privatise Americas air-traffic control service.This week the president out-lined a plan to turn air-traffic control into a separate non-profit entity financed by user fees,instead of the present patchwork of taxes and grants.Shorn of its air-traffic responsibility,the FAA would become a satety body America's air-traffic system is vast,consising of 14,000 controllers working in 476 airport-control towers that handle take-offs and landings,as well as in 21"en route"centres looking after flights along the nation's airways.（2）This leads to delays and frustrated flyers.With passenger numbers set to grow from 800m a year to almost Ibn by 2026,the problem will only get worse（3）Many countries,including Australia,Britain and Canada,have privatised air-traffic services or turned them into state-owned firms.Nav Canada,a non-profit firm that has long managed Canadian airspace,has costs per flight hour of 340 compared with the FAA's$450.Replacing old radar-based methods with accurate satellite navigation and better digital communications is a particular priority.Aircraft using satellite navigation can be safely spaced more closely together,which permits many more planes to be in the air at the same time.Digital systems also provide data links to control centres and to other planes by regularly broadcasting an aircraft's identification sign,its position and course.（4）The president's proposal might even speed a move towards"virtual"control towers in low-rise buildings,which can replace towers physically localed at airports.The European Union reckons such innovations will allow three times as many flights to be handled in the region and save airlines some 9bn（$10bn）a year.It also,optimistically perhaps,predicts that on average aircraft will land with in one minute of their scheduled arrival time.That would count as a miraculous improvement for any one,let alone America's weary airport warriors（5）A similar plan got stuck last year,despite being backed by most airlines and the air-traffic controllers'union.At least the president can dodge the queues Air Force One flights get special clearance4选？A.In addition to providing air traffic services,the FAA also provides safety oversight for those services,which may create an inherent conflict of interestB.It has a good safety record,but elderly technology limits the number of flights that can be hanedC.Many Democrats argue that changing the status quo is unnecessary given that flying in the United States is as safe as it's ever beenD.Mr Trump believes that,no longer mired in a federal bureaucracy the air-traffic service will become more efficient and better able to invest in technologyE.This would allow"free routing",which means pilots can fly diretly to a destination,rather than fllow established aiways,which often zigzag around.F.Mr Tump.though,may struggle to get the proposal through Congress.G.That crash led to the creation of a new body,which became the Federal Aviation Administration（FAA）,in charge of running and modermising the world's biggest air-transport system.
选项 A.In addition to providing air traffic services,the FAA also provides safety oversight for those services,which may create an inherent conflict of interest

B.It has a good safety record,but elderly technology limits the number of flights that can be haned

C.Many Democrats argue that changing the status quo is unnecessary given that flying in the United States is as safe as it's ever been

D.Mr Trump believes that,no longer mired in a federal bureaucracy the air-traffic service will become more efficient and better able to invest in technology

E.This would allow"free routing",which means pilots can fly diretly to a destination,rather than fllow established aiways,which often zigzag around.
F.Mr Tump.though,may struggle to get the proposal through Congress.
G.That crash led to the creation of a new body,which became the Federal Aviation Administration（FAA）,in charge of running and modermising the world's biggest air-transport system.
答案 E
解析 本段指出空管改革的主要任务是以精确的卫星导航和数字通讯替代依赖雷达的老式系统。数字系统可向控制中心及其他飞机传输数据,定时发布飞机的识别标志、位置及航道。由此可知,空白内容应继续阐述数字系统的优势。[E]内容为这使得飞行员可以“自由选择路线”,即直接飞往目的地,而不必遵循以往那些曲折迂回的既定航道,本句开头的Ths指代上文的数字系统,上下文衔接自然,成因果关系,故为答案
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