1221.In addition,it shall provide definitions or explanations of symbols,abbreviations,and terminology used in the Handbook.

A. 在将飞机恢复至初始状态前,确保已完成该步骤。

B. 确保在完成该步骤前,先将飞机置于初始状态。

C. 将飞机拖回初始位置前,应确保已完成该步骤。

A. 用净水清洗内表面。

B. 用温水清洗外表面。

C. 用冷水清洗外表面。

A. Operator is in charge of the maintenance of the handbook.

B. The handbook should be kept current by the operator.

C. The operator should store the handbook in a proper status.

A. 燃油在燃烧室内燃烧。

B. 燃油通过喷嘴进入雾化器。

C. 燃油通过雾化器进入燃烧室。

A. A centrifugal pump supplies hydraulic fluid to the unit.

B. The unit is isolated from hydraulic fluid through a centrifugal pump.

C. A centrifugal pump withdraws hydraulic fluid from the unit.

A. Those units and components are responsible for storing and delivering fuel to the turbines system,including engine-driven fuel pumps,fuel tanks (airbags),valves,booster pumps,etc.and provide components for dumping fuel overboard.

B. Those units and components are used to store and deliver fuel to the engine,including engine- driven fuel pumps,integral tanks (bladder),valves,boost pumps,etc.,and those components which furnish a means of in-flight fuel dumping .

C. Those units and components are designed to store and deliver fuel to the gas engine system,including engine-driven fuel pumps,fuel tanks (airbags),valves,booster pumps,etc.and units to pour fuel to the air.

A. 附件齿轮箱不包括用螺栓固定在发动机上和紧邻发动机的那些附件传动装置。

B. 附件齿轮箱不包括在发动机旁边的那些附件传动装置。

C. 附件齿轮箱包含了固定在发动机上且与发动机紧邻的一系列附件传动装置。

A. 结构或设备的改装可以改变基本质量和重心坐标。

B. 结构或设备大修可以造成基本质量和重心协调的改变。

C. 基本质量和重心改变后需要进行结构或设备的改装。

A. The emergency procedures check list should be in precise form.The list not only tells pilots which items to check,but also provides everything about operation details of systems.

B. The emergency procedures check list should be in complicated form.The list tells pilots which systems to be investigated.It also provides operation details of some systems.

C. The emergency procedures check list should be in brief form.The list tells pilots which items to be examined.It provides nothing about operation details of any system.

A. 转动滑轮之前,拆下销子。

B. 转动扇形盘之前,取下销子。

C. 转动轮毂之前,拆下销子。