Reference Datum is an imaginary vertical plane from which all horizontal distances are measured for balance purposes.

A. Proper recipe shall be adopted to measure the pressure.

B. The pressure shall be estimated by using accurate equation.

C. Calculate the pressure with the applicable formula.

A. The values must be less than the approved differences.

B. The values must not exceed the allowable differences.

C. The values must be less than the allowable differences.

A. In the correction column, list any notes or key points involved in correcting the trouble in the unit.

B. List any notes or key points involved in corrective actions for units faults during correction.

C. List all corrective actions, any notes or key points related to a unit failure when you do the Correction.

A. 表中给出了尺寸。

B. 表在桌子上。

C. 尺寸在图中显示。

A. 为了便于阅读和交叉索引，图解说明、图形和表格实际上应以垂直布局呈现。

B. 为了便于阅读和相互参考，插图、图形和表格如果可行的话，应以垂直布局呈现。

C. 为了便于阅读和相互对照，示意图、插图和表格在实际情况下应以垂直布局呈现。

A. When this material comes into contact with hot surfaces, it emits hazardous fumes.

B. Contact between hot surfaces and this material results in the release of harmful heat.

C. Dangerous fumes are consumed by this material upon contact with hot surfaces.

A. Navigation and full/static pressure systems refer to those units and components that provide aircraft navigation information, covering OOMB, pitot, static, ILS, flight guides, binnacles, indicators, etc.

B. Navigation and pitot/static systems refer to those units and components which provide aircraft navigational information, including VOR, pitot, static, ILS, flight director, compasses, indicators, etc.

C. Navigation and pitot/static systems refer to those units and components that provide aircraft navigation information, including VOR, pitot, still tubes, instrumental system, flight manual, compasses, indicator, etc.

A. Stop the engine run-up practice.

B. Stop the engine start procedure.

C. Stop the engine ignition project.

A. The properties of these sealants prevent corrosion.

B. Corrosion frequently occurs due to the features of these sealants.

C. The properties of these sealants make themselves easily corroded.

A. 在开始检查前，你应该拆除接近门和整流罩。

B. 在开始检查前，你应该拆除登机门和整流罩。

C. 在开始检查前，你应该拆除舱门和组件。