The main purpose of this passage is _______. A: to introduce the history of airplanes. B: to introduce the features of airplane instruments. C: to trace the origin of the development in designing airplanes. . D: to show the importance of airplanes.

13. Some airplanes are leaving, and many flights are postponed.

What does the professor mean where says this: A: Results are tragic when airplanes strike birds. B: Sightings of birds from aircraft are unusual. C: Airplanes do not frighten away most birds. D: There is little similarity between birds and jets.

词汇与结构However, airplanes with a castering nosewheel may require you to _____the use of the rudder pedals with independent use of the brakes.

7. Precision Approach Radar (PAR) is used by air traffic controllers to keep track of airplanes far away from the airport.

How do people prefer to travel between European cities? A: They take long-distance bus. B: They take high-speed trains. C: They drive cars. D: They take airplanes.

To be sure, in Los Angeles, California, people make a lot of movies in Hollywood. Near Seattle, Washington, people there make big airplanes, and in ____________, people publish books and make money on the stock market as well.

The airlines may be satisfied if the TSA can A: distribute the no-fly lists before a flight. B: revise the terrorist watch lists more often. C: prevent terrorists from boarding airplanes. D: abolish the current terrorist screening system.

I have not yet grown accustomed to war and can't relate a single chain of causes and effects these airplanes, the roar of bombs, the earth radiating out from the forest, and my seemingly inevitable death.

People waiting at an airport ______. A: enjoy hearing airplanes taking off and landing B: are usually not troubled by the noise C: can easily tell sound from noise D: are often physically affected by the noise