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A pilot cannot fly a plane by sight alone. In many conditions, such as flying at night and
What is the main topic of this passage?
A.The nature of radar.
B.Types of ranging.
C.Alternatives to radars.
D.History of radar.
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What is the main topic of this passage?
A.The nature of radar.
B.Types of ranging.
C.Alternatives to radars.
D.History of radar.
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文: The helicopter can fly forwards, backwards, up, down, and sideways. It can also hover in the air. It needs no runway to operate from. It can land and take off from a flat roof-or a clearing in the jungle.
The main disadvantage of the helicopter is that it cannot fly as fast as most planes. It is also often noisy. Helicopters are widely used by the armed forces. They are also useful for sea and mountain rescue operations. In some cities they are used for regular passenger flights.
The helicopter is different from an aeroplane which gets its lift from fixed wings, and its thrust from a propeller or a jet. Instead of wings, the helicopter has a many-bladed rotor on its top. This is driven by the engine. The rotor blades are, however, the same shape as wings and they provide lift for the helicopter when they turn. The spinning rotor also propels the helicopter. The helicopter pilot maneuvers his craft by altering the angle of the rotor blades.
As the turning of the rotor tends to make the body of the helicopter turn as well, most helicopters have a small rotor on their tail.
(27)
A.It is noisy.
B.It cannot fly as fast as most planes.
C.It has a small rotor on its tail.
D.It is small.
______that the pilot couldnt fly through it.
A.The storm so severe was
B.So severe was the storm
C.So the storm was severe
D.Such was the storm severe
A.fly — pilot
B.big—size
C.visit—visited
D.long — length
A.A space rocket can only be used once.
B.The pilot can fly a space plane just like an ordinary plane.
C.A space rocket travels much faster than a space plane.
D.Both A and B.
What can be concluded from the passage?
A.Amy Johnson was the first pilot to fly to Australia all by herself.
B.Amy Johnson's parents were rich and generous.
C.Amy Johnson was the first woman who owned an airplane.
D.Amy Johnson's dream came true.
The phrase "to get airborne" in the second paragraph most probably means______.
A.to fly in the air
B.to be born in the air
C.to pilot the plane in the air
D.to be transported by air
What can be concluded from the passage?
A.Amy Johnson was the first pilot to fly to Australia all by herself.
B.Amy Johnson's parents were rich and generous.
C.Amy Johnson was the first woman who owned an airplane.
D.Amy Johnson's dream came true.
A、Well, nobody told him about the extra weight.
B、Weight and balance is a formality forced on pilots by the FAA.
C、He can’t wait around to de-fuel, they have to get there on time.
A.2
B.4
C.12
D.40
E.160
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