Provide ventilation for lavatories and galleys.

A. The space equipment releases the air from the compound.

B. The vacuum equipment decreases the air from the compound.

C. The vacuum equipment removes the air from the compound.

A. Replace the No. 1 and No. 2 computers. Then do the test again.

B. Interchange the No. 1 and No. 2 computers. Then do the test again.

C. Repair the No. 1 and No. 2 computers. Then do the test again.

A. 程序应在每章内按编号顺序进行准备，并有适当的主次科目标题，无需从新的页面开始。

B. 程序应在每章内按照主次标题和参考号的形式进行编写，不需要从新的页面的开头开始。

C. 程序应在每章内按参考编号顺序编制，并有适当的主、副标题，而无需从新页的顶部开始。

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. 对现有的分析进行了审查，以确定可能存在安全裕度较低的部件和区域。

B. 从分析结果发现，有部件和相关区域显示出安全性能较低的迹象。

C. 故障分析结果显示，某些部件和区域现有些安全指标达不到设计要求。

A. 显示器必须与表中的数值一致。

B. 根据显示要求必须与台架上的活门保持相同。

C. 显示结果必须与表中的数值一致。

A. The following safety precautions can be used to avoid explosion.

B. The safety measures that follow are available to inflammable items.

C. The safety precautions that follow are applicable to explosive items.

A. 短距和软地着陆时的正常操作程序

B. 正常操作程序下的短场和软场着陆

C. 短地和软地着陆的正常通告程序

A. Use a drill bit not less than 45 mm long.

B. Use a drill bit that has a maximum length of 45 mm.

C. The drill bit used is more than 45 mm.

A. 当需要了解膜片时，使用箭头指示方向。

B. 必要时应使用箭头表示流向来理解原理图。

C. 利用箭头指示的方向来理解线路施工图。