340 易碎接头是常闭活门。

The fragile connector is usually closed. 易碎连接器通常是闭合的

The quick-break switch is normally in the off position.

The frangible fitting is a normally closed valve.

正确答案：C

1149、If you accidentally spray rain repellent fluid onto a dry windshield, remove the fluid witch a solvent.

1148、确保客舱压力恒定。

1147、如果压力不在给定范围内,对门阻尼器的蓄压器进行加压。

1146、Turn the adjuster three clicks countetclockwise.at

1145、减震器是一个可伸缩油气装置。

1144、Except for foldout pages and start of chapters, all pages shall be printed on both sides.

1143、此程序对 C 类零件特别重要。

1142、用温度计测量外界大气温度和驾驶舱温度。

1141、Each page shall, bear a page number and date of issue, or revision at the bottom.

1140、不要在有污水的地方拖动。