在程序句中，冒号前最多可以使用20个单词。

A. 在本节显著的位置应包括一个清楚的声明，内容是适航限制部分由FAA批准。

B. 当本节很显著标示出适航限制部分，这说明FAA批准了其影响。

C. 本节应在显著位置包括一份清晰的声明，说明适航限制部分的影响是FAA批准的。

A. 将飞机放回到通常停放位。

B. 将飞机放回到初始位置。

C. 将飞机恢复到初始构型.

A. The tune time for a frequency not in memory is 2 to 4 seconds typical, 7 seconds maximum.

B. The adjust time for a frequency not in memory is 2 to 4 seconds typical, 7 seconds maximum.

C. The tune time for a frequency not in memory is 2 to 4 seconds common, 7 seconds maximum.

A. Do not reach this speed with a given flap setting.

B. Do not exceed this speed with a give flap setting.

C. Do not exceed this speed with a given flap setting.

A. The damper prevents abnormal movement of the control.

B. The control is protected from unusual movements by the damper.

C. The damper prevents sudden movement of the control.

A. 氧气系统包括氧气瓶、释压阀、关断阀、出气口、调节器、面罩等。

B. 供氧系统包括氧气瓶、释放阀、截止阀、排气口、监管者、面罩等。

C. 供氧系统包括氧气瓶、开关阀、切断阀、紧急出口、调节器、面罩等。

A. 保证表盘上的示数符合坦克的特性。

B. 确保面板上的显示符合罐内的性质。

C. 确保仪表上的指示与油箱内的油量一致。

A. 描述飞机燃油系统时，应阐述不可用燃油相关信息。

B. 描述飞机燃油系统时，应阐述最后储备相关信息。

C. 描述飞机燃油系统时，应阐述无用油。

A. 液压油会造成起火。

B. 液压油会引起腐蚀。

C. 液压油会导致伤害。

A. Many readers have little knowledge of English. Complex sentence structure and the large number of meanings and antonyms that many English words have can cause misconception.

B. Many readers have a limited knowledge of English. Complex sentence structure and the large number of meanings and synonyms that many English words have can cause confusion.

C. Many readers have a little knowledge of English. Complex sentence structure and the large number of meanings and homonyms that many English words have can cause frustration.