Line Maintenance should be understood as any maintenance that is carried out before flight to ensure that the aircraft is fit for the intended flight.

A. All aircraft engines must meet certain general efficiency, economy, and reliability requirements, which require that the ignition system can provide ignition pulses at the proper time to the spark plug in various weather and other adverse conditions.

B. All aircraft engines must meet certain overall efficiency, economy and reliability requirements, which require the ignition system should provide ignition pulses at appropriate times under meteorological and other unfavorable conditions.

C. All aircraft engines must meet certain general requirements of reliability, economic and efficiency, which dictates the use of ignition systems that deliver the firing impulse to the spark plugs in all kinds of weather and under other adverse conditions.

A. In an emergency, the one-shot battery supplies DC power.

B. The one-act battery supplies AC power during emergencies.

C. The one-side battery provides DC power during emergency situations.

A. 航空器停留和系留时任何可能遇到的情况的说明在”停留和系留”这个标题下。

B. 航空器在任何可能遇到的情况下如何停留和系留的说明在”停留和系留”这个标题下。

C. 航空器应该服从什么样的条件来停留和系留的说明在”停留和系留”这个标题下。

A. 防腐剂可能存在于腐蚀严重的部位。

B. 腐蚀敏感的部位可以安装防腐组件。

C. 易受腐蚀的部位可能有防腐剂。

A. 当替换某个单词时，一定要确保所选择的替代词不会改变句子的意思。

B. 如果需要替换某个单词，从备用词汇中选择合适的词以确保不会改变句子含义。

C. 当替换某个单词时，始终要确保不要变动句子的意思和结构。

A. 一台发动机可以为所有系统供电。

B. 一台发电机可以为所有系统供电。

C. 一台动力装置可以为所有系统供电。

A. The numbering of paragraphs and subparagraphs within a section is not required.

B. No numbers of paragraphs and subparagraphs is required in a section.

C. The numeral order of the paragraphs and subparagraphs is unnecessary in a section.

A. Legal meaning whatsoever and implications couldn＇t be enclosed to the rules and terms in this document.

B. No legal significance or meanings should be fixed to the regulations and terms in this document.

C. The rules and terms in this document have no legal meaning or imply something.

A. 确保静压管没有堵塞。

B. 确保皮托管没有堵塞。

C. 确保排气管没有渗漏。

A. 描述飞机发动机时，应描述有关发动机仪表的以下信息： 1.仪表操作方法 2.读数极限值和典型正常值（如适用）。

B. 描述飞机发动机时，应描述发动机仪表有关： 1.操作方法 2.读数限制和典型值（如适用）。

C. 描述飞机发动机时，应描述一下发动机仪表： 1.操作方法 2.限制读数以及典型值（如适用）。