439.If the valve opening is premature,stop the test.

A. To open the containers for these materials,suitable tools must be used.

B. The appropriate tools should be selected to open the materials,the containers is inside the materials.

C. The inappropriate tools should be selected to open the containers,the containers is made in the materials.

A. In a complicated system,troubleshooting is made up of four chapters.

B. Troubleshooting in a complex system consists of four sections.

C. Four processes are combined to troubleshoot the complicated system.

A. In an emergency,the one-shot battery supplies DC power.

B. The one-act battery supplies AC power during emergencies.

C. The one-side battery provides DC power during emergency situations.

A. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through ducts to the user systems.

B. The pneumatic system gets compressed air from the pneumatic air sources and supplies the compressed air through manifold to the user systems.

C. The pneumatic system gets comprised air from the pneumatic air sources and supplies comprised theair through ducts to the user systems.

A. Do not fuel the aircraft if the flight deck displays an engine overhead warning.

B. Do not refuel the aircraft if an engine overheat warning is displayed on the flight deck.

C. Do not replenish the aircraft if the flight deck displays an engine overheat warning.

A. 确保杆之间有合适的间隙。

B. 确保杆之间有合适的角度。

C. 确保杆之间有足够的间隙。

A. 戴上氧气面罩并进行呼吸,确认其供氧正常。

B. 在佩戴氧气面罩前进行深呼吸,确认血液中氧气充足。

C. 为确保供氧正常,请不要摘下氧气面罩并进行呼吸。

A. This document provides supplementary information to the applicable manual.

B. This document provides primary information to the applicable manual.

C. This document provides special information to the applicable manual.

A. You need to open the cargo door when the windspeed exceeds 30 knots.

B. Wait for the wind speed to increase to over 30 knots before opening the cargo door.

C. You are allowed to open the cargo door when the wind speed reduces to less than 30 knots.

A. Put the repair patch accurately on the damaged area.

B. Put the repair patch on the correct damaged area.

C. Correctly put the repair sealant on the damaged parts.