49.Set the rotary switch to INPUT.

A. Briefly describe and explain principle of operation of any new kinds of flight instruments.

B. Briefly introduce the operation principal ofany new kinds of flight apparatus."

C. Briefly describe and explain the operation principle ofany new kinds of flight displays."

A. 引擎多的飞机改出螺旋程序可由代理商分别编写。

B. 多发飞机的改出螺旋程序可由制造商选择。

C. 多台发动机的改出螺旋程序可以包含在飞机制造商的操作手册中。

A. Pressurization of the pneumatic crossover manifold and use of an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance is the second method.

B. You can use the second method to pressurize crossover manifold and use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

C. The second method is that it is not necessary to pressurize the pneumatic crossover manifold but to use an external air source connected to the air charging valve manifold to pressurize the reservoirs for ground maintenance.

A. 因为轴的损坏,导致泵不运转。

B. 由于泵的设计问题,导致其停止运转。

C. 泵运转失常的原因在于叶轮的损坏。

A. 修复所有凹坑的表面。

B. 修复有腐蚀的表面。

C. 修复有划痕的表面。

A. 确保座舱温度保持恒定。

B. 确保座舱压力保持不变。

C. 确保座舱湿度保持稳定。

A. When simulating altitude,make sure you have alternate ATC transponders in active mode.

B. Make sure that the ATC transponders are in standby mode when you simulate altitude.

C. It is optional to keep the ATC transponders in ready mode during altitude simulation.

A. 通常句子的上下文会向读者提供足够的信息来获知正确的意思。

B. 通常句子的内容会向读者提供足够的信息来获知正确的意思。

C. 通常句子的内容会向读者提供足够的信息来获知已被修正的意思。

A. Write notes only to give content,not commands.

B. Write notes only to give information,not instructions.

C. Write cautions only to give information,not orders.

A. All range distances shall be expressed in nautical miles.

B. All range dimensions shall be defined in kilometers.

C. Nautical miles should not express all range distances.