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Helicopter

   THE HELICOPTER

A helicopter, also called a chopper in military slang , is a special type of aircraft.There is a great contrast between the chopper and most other aircrafts. It is powered by two  rotors.

One rotor is located on top of the aircraft; the other is on the aircraft's tail. Each rotor rotates, or spins around, in a fast circular motion enabling the aircraft to move. In fact, the rotary or spinning movement of the rotors' blades provides lift for the helicopter.

  �« Tail rotor            �«  Main rotor            

            �« Rotating/spinning

Helicopters can move upward, downward, sideways, forward, and backward. This backward, or reverse movement is one of several special functions of helicopters. Another function is that it can suspend itself in the air without moving; it can hover or remain still in the air. Because they have these special abilities, choppers can hoist, or lift, heavy objects such as machinery.

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1. The children want to choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know a rope from the tree so they can practise climbing.

2. These fans are not producing any air. I think the fan blades don't choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know .

3. Spinning wheels have a choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know movement.

4. The helicopter tried to choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know the heavy equipment to the top of the building.

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6. Johnny choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know his turning toy so much that he broke it.

7. Most helicopters have two choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know that provide their movement.

8. The ranger asked the choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know pilot to help him find the little lost girl.

9. The teacher showed Tim how to move the car in choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know .

10. My brothers' personalities choppercontrasthoisthoverreverserotaryrotatedrotorsspinsuspend I don't know greatly. One is very noisy and active while the other is quiet and lazy.