（1）当自动驾驶仪突然失效或出现故障时，可以由人工进行“强力操纵”飞机，以保证飞行安全；（2）在利用自动驾驶仪控制飞机的时候，驾驶员可以自由使用人工操纵，以上两种说法中（）。

During flight, （ ） can be used to move the nose up and down for desired altitude or height.

To initiate a turn, the pilot use the （ ） and （ ） in combination.

Which of the following does not go with all the others?

Which word does not go with all the others?

Which of the following is a primary control system?

Which of the following is an assistant control system?

Which of the following is not part of empennage?

Which word does not go with all the others?

Which word does not go with all the others?

Which word does not go with all the others?