548. 用干净的布吸收液体。

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. the first and second publications replace the previous original edition.

B. more publications replace the previous original version.

C. The second or more publications take place of the previous original edition.

A. This compartment includes some of the electrical equipment.

B. This cabin has some of the electromotive equipment.

C. This bay contains some of the electronic equipment.

A. It includes items such as the deflation of shock struts.

B. It includes items such as the lubrication of j shock struts.

C. It includes items such as the inflation of shock struts.

A. Do not let the pressure go below 20 psi.

B. Do not decrease the pressure to 20 psi

C. Do not let the pressure become less than 20 psi.

A. 只有经过授权的人员方可以留在该区域

B. 只有经过改装的人员方可以留在该区域

C. 只有经过检验的人员方可以留在该区域

A. In this specification, for those who do not have an established code, individual electrical symbols are given as a suggestion.

B. As a suggestion for those who do not have an established code, individual electrical symbols are gained in this specification.

C. As a suggestion for those who do not have an established code, individual electrical symbols are required in this specification.

A. A certificated pilot who owns or operates an airplane not used as an air carrier is authorized by FAR Part 43 to perform limited preventive maintenance on his airplane.

B. A certificated pilot who owns or operates an airplane that is not airworthy can perform limited predictive maintenance on his airplane authorized by FAR Part 43.

C. A licensed pilot authorized by FAR Part 43 who owns or operates an airplane not used to operate can perform time-limited maintenance on his airplane.

A. magnesium belongs to the combustible materials of Class D fire.

B. Hydraulic fluid, oil and fuel belong to the combustible materials of Class D fire.

C. Paper and wood belong to the combustible materials of Class D fire.

A. 可以通过拆下保护盖来接近机械装置

B. 重新安装保护盖来接近机械装置

C. 拆下保护盖来获得机器