房宁英语专四完形填空模拟练习题四

2020年12月26日发(作者：常粲)
英语专四完形填空模拟练习题四

Flight simulator （飞行模拟器） refers to any electronic or mechanical system
for training airplane and spacecraft pilots and crew member by simulating flight
conditions. The purpose of simulation is not to completely substitute （1） actual
flight training but to thoroughly familiarize students with the vehicle （2） before
they （3） extensive and possibly dangerous actual flight training. Simulations also
is useful for review and for familiarizing pilots with new （4） to existing craft.
Two early flight simulators appeared in England within a decade after the
first flight of Orville and Wilbur Wright. They were designed to enable pilots to
simulate simple aircraft （5） in three dimensions， nose up or down； left wing high
and right low， or vice versa； and （6） to left or right. It took until 1929， however，
for a truly effective simulator， the Link Trainer， to appear， devised by Edwin
A. Link， a self-educated aviator and inventor from Binghamton， New York. （7）
airplane instrumentation had been developed sufficiently to permit
on instruments alone， but training pilots to do so involved （8） risk. Link built
a model of an airplane cockpit equipped （9） instrument panel and controls that could
realistically simulate all the movements of an airplane. Pilots could use the device
for instrument training， manipulating the controls （10） instrument readings so
as to maintain straight and level flight or （11） climb or descent with no visual
reference （12） any horizon except for the artificial one on the instrument panel.
The trainer was modified （13） aircraft technology advanced. Commercial airlines
began to use the Link Trainer for pilot training， and the US government began
purchasing them in 1934， （14） thousands more as World War II approached.
Technological advances during the war， particularly in electronics， helped
to make the flight simulator increasingly （15） The use of efficient analog computers
in the early 1950s led to further improvements. Airplane cockpits， controls， and
instrument displays had by then become so inpidualized that it was no longer feasible
to use a generalized trainer to prepare pilots to fly anything （16） the simplest
light planes. By the 1950s， the US Air Force was using simulators that precisely
（17） the cockpits of its planes. During the early 1960s （18） digital and hybrid
computers were adopted， and their speed and flexibility revolutionized simulation
systems. Further advances in computer and （19） technology， notably the development
of virtual-reality simulation， have made it possible to （20） highly complex
real-life conditions.
1. A. for B. to C. with D. on
2. A. concerning B. concern C. being concerned D. concerned
3. A. undertake B. undergo C. underplay D. underuse
4. A. models B. modifications C. modifiers D. modica
5. A. manifestations B. manipulations C. manifestoes D. maneuvers
6. A. yawling B. yawning C. yawing D. yawping
7. A. From then on B. From now on C. By now D. By then
8. A. considerable B. considerate C. considering D. considered
9. A. for B. in C. with D. on
10. A. on the part of B. on the basis of C. on the track of D. on the verge
of
11. A. control B. controllable C. controlled D. controller
12. A. to B. for C. on D. in
13. A. as for B. as to C. as D. for
14. A. acquiring B. requiring C. sustaining D. retaining
15. A. actual B. realistic C. realizing D. true
16. A. except B. except for C. apart from D. but
17. A. replenished B. replaced C. replicated D. reposed
18. A. electronic B. electric C. electricity D. electron
19. A. program B. programmable C. programmed D. programming
20. A. resurrect B. reproduce C. resuscitate D. resume
ADBBD CDACB CACAB DCADB