A mixture of water and methanol increases the power of the engine.

A. When there are too many positive or subtractive pressure in the fuel tanks,the pressure relief valve eliminates damage to the wing structure.

B. When there is too much plus or minus pressure in the fuel tanks,the pressure relief valve previews damage to the wing structure.

C. The pressure relief valve prevents damage to the wing structure when there is too much positive or negative pressure in the fuel tanks.

A. 21章指随飞机提供的供应商数据，以填充以下 -00 至 70 节（如适用）。

B. 21章可参考随飞机提供的供应商数据，来填充以下 -00 至 70 节（如适用）。

C. 21章可以指随飞机提供的供应商数据，按照从-00 至 70 节的顺序（如适用）。

A. The specification gives the symbols for relays, diodes, and other parts of the system.

B. The specification gives the requirement for markings on relay, triode and other parts of the system.

C. The specification excludes symbols for relays, diodes, and other system parts.

A. 超常程序部分的精确目录应该通过手册生产商来确定，需要考虑每架飞机的设计数据。

B. 异常程序部分的确切内容应由各手册编制者根据每架飞机的设计特点确定。

C. 不正常流程部分中的特定内容应当考虑每架飞机的设计参数来决定手册的生产。

A. 用可用的方式计算压力。

B. 计算带可用公式的压力。

C. 用适用的公式计算压力。

A. 供应足够容量和尺寸的容器。

B. 供应足够容量和直径的容器。

C. 提供符合规范的容器和量尺。

A. They comprise the three parts as follows:tail assembly,the structures at the rear of the airplane ,structures forming part of and attached to the wing.

B. They include three parts,one of them is tail assembly,one of them is the structures part at the rear of the airplane,one of them is structures part that forming part of and attached to the wing.

C. They include two parts,one of them is tail assembly at the rear of the airplane that serve to control and maneuver the aircraft,another of them is structures part that forming part of and attached to the wing.

A. Examine the transformer of the floor panel.

B. Examine if the floor panel is laminated.

C. Examine the floor panel for deformation.

A. To work with electrical cable, we need tools specifically vattmeter, amperemetres and ohm meters.

B. To work with electrical cable, vattmeter, amperemetres and ohm meters are helpful tools.

C. In order to work with electrical circuit, we need tools specifically voltmeter, amperemetres and ohm meters.

A. Present the examples, associated conditions and technique on the possible page of the chart and use the page including the chart to concise the necessary information if the space is insufficient.

B. Present the chart, examples, associated conditions and technique on the same page if possible and use the page facing the chart if the space is insufficient for the necessary information.

C. Try to place the examples, associated conditions and technique on the same page as the chart if possible and use another page including the chart to describe the necessary information when the space is not sufficient.