A、 The main gear doors are pneumatically sequenced to remain open while the gear is extending or retracting.
B、 The main gear doors are hydraulically sequenced to remain open while the gear is extending or retracting.
C、 The main gear doors are automatically sequenced to remain open while the gear is extending or retracting.
答案：B
A、 The main gear doors are pneumatically sequenced to remain open while the gear is extending or retracting.
B、 The main gear doors are hydraulically sequenced to remain open while the gear is extending or retracting.
C、 The main gear doors are automatically sequenced to remain open while the gear is extending or retracting.
答案：B
A. Make sure to dim the panel lights during day and night operation.
B. During night operation, make sure that the panel lights are moderately bright.
C. Ensure that the panel lights are set to a dim setting during night operations.
A. Use a minimum of 20 words in each sentence.
B. Use a maximum of 20 words in each sentence.
C. Use more than 20 words in each sentence.
A. Use a degreasing agent to remove oil and grease.
B. Draw oil and grease from a degreasing agent.
C. Add oil and grease into a degreasing agent.
A. 执行此步骤需要两个人。
B. 两个人来做这个工卡是必须的。
C. 最少需要两个人来做这个工作。
A. 检修时更换的螺母和垫圈不要丢弃，应该进行检查。
B. 如果在检查过程中拆卸了螺母和垫圈，则应更换。不要重复使用。
C. 对拆下的螺母和垫圈要进行检查，损坏的件不可以重复使用。
A. 确保警告灯至少亮3秒。
B. 确保告诫灯亮的时间不超过3秒。
C. 确保警告灯在3秒内点亮。
A. 将O形环安装在锥形轴承的内部凹槽中。
B. 将O形环安装在圆柱形轴承的中部凹槽中。
C. 将O形环安装在球形轴承的内部凹槽中。
A. The brackets should be connected to the nearest components.
B. Align the brackets with the adjacent components.
C. Keep the brackets engaged with the nearby components.
A. Ground Control depicts minimum diameter of turning for taxiing and ground operation.
B. Ground Control describes minimum radius of turn for taxiing and ground handling.
C. The least radius of turn for taxiing and ground maneuver is described in Ground Control.
A. 电源接通后再打开外壳。
B. 电源接通前不要打开外壳。
C. 电源接通时不要打开外壳。
