1213.Calculate the quantity of fuel necessary for the flight.

A. The lower seal appears as the lower bearing is pulled down.

B. You can see the lower seal before pulling the lower bearing down.

C. Only after you pull the lower seal down can you see the lower bearing.

A. Put down a face mask and protective clothing.

B. Put on a face goggle and protective clothing.

C. Put on a face mask and protective clothing.

A. 测量跑道灯连接的电阻。

B. 校准跑道灯连接的电阻。

C. 复核跑道灯连接的电阻。

A. 每一个点处的宽度和深度值不能小于 30。

B. 每一个点处的宽深值不能大于 30。

C. 每一个点处的宽深比不少于 30。

A. 在设计的概要图里,可能需要在让图表内容详实和便于阅读理解的简单之间妥协。

B. 在设计原理图时,可能有必要在使图不言自明所需要的细节和易于阅读和理解所必需的简单之间作出折衷。

C. 在设计插图的过程,涵盖细节来让图表自行展示且方便阅读和理解是有必要的。

D. C.在设计插图的过程,涵盖细节来让图表自行展示且方便阅读和理解是有必要的。

A. Make sure that the latch is fully engaged.

B. Make sure that the knob is fully engaged.

C. Make sure that the latch in full engaged position.

A. Procedures contain tasks that give instructions on how to perform them.

B. Procedures contain general instructions that show you how to do tasks.

C. Procedures contain instructions that tell you how to do a task.

A. 要先安装螺钉(10),才能安装盖组件(9)。

B. 要拆下盖组件(9),首先要拆下这四个螺钉(10)。

C. 要拆下螺母(9),首先要拆下这四个螺栓(10)。

A. 如果不做这个改装,这个装置的使用寿命可能会比平时短。

B. 如果不做这个改装,这个单元的维修寿命可能会比平时短。

C. 如果做了改装,这个装置的使用寿命会比预计的寿命长。

A. Those units means that they can prevent it from eroding.

B. Those units provide a method of deicing.

C. Those units provide a way to prevent the formation of ice.