词汇与结构 The elevators provide pitch control around the airplane’s _________ axis. The elevators are positioned by the pilots’ control column.

Elevators are usually installed in a room during construction.

DFCS can automatically operate the elevators and rudders to control the pitch and yaw of the aircraft.

Elevators are commonly installed in building during_______ . A: decoration B: construction C: transprtation D: operation

Hydraulic systems can provide hydraulic power for elevators so that to reduce the control force of the pilot for pitch control.

Visitors travel up and down the tower in double-decker elevators that can hold up to _________people at the rate of seven meters per second.

If the pound’s value is high, British _____ will spend their money abroad because the pound will buy them more. A: elevators B: conquerors C: dictators D: investors

The primary flight control system uses conventional control wheel, column and pedals linked mechanically to hydraulic power control units which command the primary flight control surfaces, ailerons, elevators, and _________.