51.Connect the disconnected wires.

A. The interval between checks is at least two minutes.

B. The lowest limit of checks is two minutes.

C. Between two checks,it needs two minutes.

A. Find the related EICAS status message which present with the maintenance information .

B. Find the correlated maintenance message that shows with the EICAS status message.

C. Find the applicable maintenance message displaying with the EICAS status message.

A. Before you use a word,read its definition in the approved meaning column of the dictionary.

B. Before you use a word,read its approved meaning in the definition column of the dictionary.

C. Before you use a word,read its meaning in the approved column of the dictionary definition.

A. Substitutes with different quality can be used.

B. You can not use substitutes with same quantity.

C. Equivalent substitutes are permitted to use.

A. You can not remove the battery.Only an approved service provider can replace it.

B. Do not replace the battery.Only an approved service provider can replace it.

C. Do not replace the battery.Only an approval of a service provider can replace it.

A. Other format is not permitted.

B. It's not permissible to use this form.

C. Either format is allowed.

A. Make sure that the cabin differential pressure is zero before you unlock the door.

B. Be sure that the variance of the cabin pressure is zero before you open the door.

C. Make certain that the difference of the compartment compression is zero before you open the door.

A. Landing gear position has no effect on stall speeds.

B. The position of the landing gear doesn't influence the surging speed.

C. The idle speed is not effected by the landing gear position.

A. 每条指令用一句话写出,除非有两个或更多的动作。

B. 每句话仅写一条指令,除非有两个或更多的动作同时发生。

C. 每条指令除非有两个或更多的动作同时发生,否则仅用一句话写出。

A. Let the plate dry at applicable temperature.

B. Let the plant dry at available temperature.

C. Let the paint dry at ambient temperature.