2528.戴上氧气面罩呼吸。

A. The units used by pilots are the most valuable.

B. The units used are those which are the most expensive for pilots.

C. The units are the most useful for the pilots.

A. 找到振动区域。

B. 找到腐蚀区域。

C. 找到受损区域。

A. 球型接头很少应用于现代飞机,因为它减少了应力。

B. 球型接头很少应用于现代飞机,因为它减少了摩擦力。

C. 因为可以减小摩擦力,滚珠轴承广泛应用于现代飞机。

A. 这个笔记本电脑有三个备用部件。

B. 笔记本电脑有三个主要部分。

C. 这个螺钉有三个主要部分。

A. Maintenance information needs to be continuously updated.The operator should communicate openly with the manufacturer about new situations,who should provide solid assistance to the operator.Only when both parties do their jobs can the entire fleet remain completely safe.

B. Maintenance information needs to be continually updated.Open communication should exist with the operator telling the manufacturer as soon as some new kind of situation arises and the manufacturer responding back with solid help to the operators.Only when both ends do their job can an entire fleet of airplanes remain continuously airworthy.

C. Maintenance information needs to be continuously updated.When a new situation arises,the operator should immediately communicate openly with the manufacturer,and the manufacturer should provide strong assistance to the operator.Only when both parties do their respective jobs can the entire fleet maintain airworthiness.

A. Write the temperature on the engine record card.

B. Record the temperature of the engine until writing it on the card.

C. Recording the temperature of the engine is done by writing it on the card.

A. 系统中用来生成电流点燃燃烧室和加力燃烧室中油气混合气的那部分。

B. 系统中产生电流以点燃燃烧变大器和推力增大器中的燃料混合物的部分。

C. 系统中产生电流以点燃燃烧变大器和推力缩小器中的燃料混合物的部分。

A. 如果故障频繁出现,进行系统测试。

B. 如果故障定期出现,进行系统测试。

C. 如果故障随机出现,进行操作测试。

A. During this period,if you use economy power settings,the engine may be damaged."

B. The use of economy power settings during this period may be detrimental to the engine life."

C. The use of economy power settings during this period may reproduce the engine life."

A. PI 上显示完成数据复制所需的剩余时间。

B. PI 显示的是复制数据所需要的时间。

C. PI 上显示剩余时间以便完成数据的复制。