Put on goggles when you use electrical equipment which makes sparks.

A. In STE, there are different rules for how to write sentences for procedures (Section 5) and for how to write them for descriptive text (Section 6).

B. In STE, there are different rules for why to write paragraphs for procedures (Section 5) and for why to write them for descriptive text (Section 6).

C. How to write sentences for programs (Section 5) and how to write sentences for operative text (Section 6) have different means in STE.

A. It is the responsibility of the operator to ensure that alternative tools or equipment can work well and are dangerous to the parts and personnel as the ones specified in the procedure if you use them.

B. If alternative tools or equipment are used, the operator must ensure that they can play the same role and are as safe as the tools or equipment specified in the procedure to the parts and personnel.

C. If the manufacturer can make sure that alternative tools or equipment can meet the requirement and are as safe to the parts and equipment as the ones specified in the procedure, you can use them.

A. Ensure that there is no corrosion on the tubes.

B. Make sure that the tubes have no deformation.

C. Make sure that the tubes have no crack.

A. 说明如何保持此记录，以便更改飞机的重量或力矩时，或在飞机正常运行时可以使用准确的起始数据来计算重量和重心。

B. 说明在更改飞机的重量或力矩时如何保持此记录，以便在飞机正常运行期间可以使用重量和平衡来准确计算起始数据。

C. 说明当飞机重量或力矩发生改变时如何进行记录，以便在飞机正常运行期间能够为计算重量和平衡提供准确的起始数据。

A. 加入溶剂使油漆变得更稀薄。

B. 加入溶剂使油漆变得更稳定。

C. 在油漆里加入更多溶液。

A. 转动凸轮以松开管路。

B. 转动卡箍以使管路自由移动。

C. 转动卡箍以松开管路。

A. 实施训练，直到熟练操作舵面。

B. 对准钻头，直到它与表面垂直。

C. 安装钻头，直到它与表面平齐。

A. Do not apply too much composite on the blanket.

B. Do not apply too much adhesive on the gasket.

C. Do not apply too much compound on the gasket.

A. 组装这个组件。

B. 分解这个单元。

C. 更换这个元件。

A. Set the air conditioning switch to the up position.

B. Place an air conditioning switch above the normal position.

C. Put one of the pack switches in the HIGH position.