It has a single shaft and operates at a constant speed.

A. 空客建议，使用千斤顶和辅助千斤顶时，其负载能力应大于顶块允许的最大载荷。

B. 空客建议，使用千斤顶和安全顶座时，顶块的负载能力应大于允许的最大载荷。

C. 在顶块的负载能力大于允许的最大载荷的情况下，空客建议使用千斤顶和安全支架。

A. 直升机最常用的两类发动机是星型发动机和涡轮发动机。

B. 螺旋桨飞机最常用的两类发动机是往复式发动机和涡喷发动机。

C. 直升机最常用的两类发动机是活塞发动机和涡轮发动机。

A. Before install the software, the plane has to be on the ground and the engines shut down.

B. The airplane must be on the ground with the engines off before you can install software.

C. The aircraft should be on the ground and engines power off before you upload the software.

A. This Specification was issued by the General Aviation Manufacturers Association

B. This Specification was revised by the General Aviation Manufacturers Association

C. This Specification was compiled by the General Aviation Manufacturers Association

A. 在描述飞机行李舱时，警告不要将儿童放在货舱内。

B. 在描述飞机行李舱时，应提供警告不要将儿童置于行李舱内。

C. 在描述飞机行李舱时，警告不要将儿童放在行李架上。

A. 拆下螺栓和止动块。

B. 拆下螺帽和挡板。

C. 拆下螺钉和螺帽。

A. Manuals for all single engine aircraft, except those that have been shown to be "critically unable to stall", should have procedures for recovering from a stall.

B. Handbooks for all single engine airplanes, other than for those airplanes which have been shown to be "characteristically incapable of spinning" shall contain procedures for recovery from spins.

C. Manuals for single engine aircraft, otherwise these that have been proved to be "featured unable to spin", should include steps for recovering from a spiral.

A. 齿轮箱是一个包含齿轮系和轴的箱体。

B. 齿轮箱包含了齿轮火车和曲轴。

C. 有一类齿轮箱包含了齿轮组和轴。

A. Do not exceed this speed with landing gear retracted or extended.

B. It is not allowed to exceed the maximum speed of the landing gear retraction.

C. Don＇t extend or retract the landing gear above this speed.

A. You can combine the drains into three primary categories.

B. You can divide the drains into three primary groups.

C. Dividing the drains into three primary groups is an ill-advised option.