A、 Ground service bus has no power, but the external power can be supplied.
B、 Ground service bus is not energized with external power.
C、 Ground service bus is power off when external power is supplied.
答案：C
A、 Ground service bus has no power, but the external power can be supplied.
B、 Ground service bus is not energized with external power.
C、 Ground service bus is power off when external power is supplied.
答案：C
A. If you use cleaner in a closed space, make sure that there is ventilation in the work area.
B. Ensure that there is adequate airflow in the work area when using solvent in an enclosed space.
C. If you use solvent in a confined space, make sure that there is restricted airflow in the work area.
A. Worn components should be replaced even if the damage is below the maximum limits.
B. Replace components that are worn beyond their maximum limits.
C. The maximum limits can not be exceeded when repairing the worn components.
A. If the drain hole is blocked, clean it.
B. If the drain hole is leaked, clean it.
C. If the drain hole is locked, clean it.
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. The air pressure is almost correct.
B. The air pressure is too low.
C. The air pressure is too high.
解析：这道题考察的是空气压力的概念。选项A表示空气压力几乎正确，选项B表示空气压力太低，而选项C表示空气压力太高。根据题干中提到的空气压力高于正常，因此正确答案是C。
让我们通过一个生动的例子来帮助理解这个知识点。想象一下，你正在爬山，随着海拔的升高，空气变得稀薄，气压也会逐渐降低。如果你突然感觉到头晕眼花，这可能是因为气压太低，导致氧气供应不足。相反，如果你在潜水时深入水下，水压会增加，这时你可能感觉到耳朵有些不适，这是因为水压增加导致耳膜受压。因此，了解空气压力的概念对我们在不同环境下保持舒适和安全非常重要。
A. Restrictions on use of cabin pressurization during Takeoff, landing, or in flight shall be noted
B. That portion of the system is used to de-ice all airfoil surfaces once ice is formed.
C. All airfoil surfaces are equipped with that portion of the system to stop ice formation.
A. The selection of data by manual producers which are included in this section shall be restrained by the concepts contained in the preface of this specification.
B. The selection of data by manual producers included in this section shall be governed by the concepts contained in the preamble to this specification.
C. In this selection, the producer＇s choice of data should be bound by concepts contained in the preamble of this specification.
A. This specification provides for the preparation and insurance of more complex manuals for less complex aircraft than aircraft operated by large scheduled airlines, while achieving industry-wide standardization of naming and formatting.
B. The specification is used to prepare and release simpler manuals for less complicated aircraft rather than the aircraft operated by large scheduled airlines while achieving industry-wide standardization of terminology and format.
C. This specification specifies the preparation and release of less complex manuals for aircraft that are less complex and operated by large scheduled airlines, and realizes the industry wide standardization of terms and formats.
A. If abbreviations have special meanings, they may be used.
B. Abbreviations should not be used if they are universally meaningful.
C. Only use abbreviations whose meanings are generally recognized.
A. It is not recommended that we remove the damage prior to submitting information to Boeing,such as dents on metallic and composite structures, and delamination or punctures to composite structure.
B. If the removal of dents on metallic and composite structures, and delamination or punctures to composite structure is approved by SRM,CMM,or SB,it is preferable to remove the damage prior to submitting information to Boeing.
C. It is recommended that we remove the damage prior to submitting information to Boeing,such as dents on metallic and composite structures, and delamination or punctures to composite structure.
