1708. Polish the surface with a soft cloth until it becomes shiny

A. You must inspect the check valve to make certain that the spring holds the check valve open a short distance before installing the duct and check valve assembly.

B. Before you installing the duct and check valve assembly, you must check the check valve to make sure the spring holds the check valve open a short distance.

C. You must exam the check valve to ensure the spring holding the check valve open a short distance before mount the duct and check valve assembly.

A. 保持安静以避免错过信号的声音。

B. 保持安静以避免混淆声音的信号

C. 保持安静以避免丢失声音信号。

A. 用正确的公式计算压力。

B. 用合理的方式计算压力。

C. 用适用的公式计算压力。

A. Perform check to see if there are traces of corrosion around the drain holes.

B. Check the drain holes for signs of corrosion.

C. Check the area surrounding the drain holes for signs of contamination.

A. 拆装部件时,不要让零件掉落。如果他们掉落,可能导致永久损伤。

B. 组装部件时,不要让零件掉落。如果他们掉落,可能导致显著的损伤

C. 组装部件时,不要让零件掉落。如果他们掉落,可能导致永久的损伤

A. Attach the cable to the structurewith wire;

B. Make the wire and cable parallel to the structure;

C. Connect the wire of the cable to the structure;

A. 对于使用时间长的飞机,大修时分解进行检查,以协助选择检查项目。

B. 为了大修而拆卸的长寿飞机,应被检查以协助选择检查项目。

C. 为了协助选择检查项目, 应检查并拆卸使用长寿的飞机进行大修。

A. The windows used for examining compartments and equipment in and about the airplane. Includes items such as, transparent material, its frame, etc.

B. Check cockpit and equipment windows. Including transparent material, frame etc.

C. Check the glass of aircraft interiors and cockpit equipment. Include transparent material, frame, etc.

A. RECORD

B. COPY

C. ENTER

A. When stop the engine, make sure that the engine decelerates to 500 RPM.

B. If the engine decreases to 500 RPM, you must to stop it.

C. When the engine RPM decreases 500, you＇d better stop the engine.