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mini-test

1. Compared with that of the aircraft maximum speed of the helicopter
a) less
b) The same
c) more

2. That does not give the body a helicopter spin around its axis
a) rotor
b) the tail rotor
a) powerful engine

3.How to fly helicopters?
a) vertically from the place
b) after takeoff
c) with tug assistance

4. As the screw spins the gyro
a) due to motor
b) the movement of the machine
c) using the manual control