A、 If you use solvent in a closed space, make sure that there is good airflow in the work area.
B、 When using composite in confined space, make sure it has good ventilation.
C、 You can not use sealant in enclosed space on condition that there is no good ventilation.
答案：A
A、 If you use solvent in a closed space, make sure that there is good airflow in the work area.
B、 When using composite in confined space, make sure it has good ventilation.
C、 You can not use sealant in enclosed space on condition that there is no good ventilation.
答案：A
A. 不要组装或修理点火嘴。
B. 不要拆解或修理点火嘴。
C. 不要组装或更换点火嘴。
A. 作动时间必须在28至40秒之间，在某个方向作动电流不得超过0.5安培。
B. 指令要求作动时间必须在28至40秒之间，且作动电流不得少于0.5安培。
C. 在任何一个方向上作动的时间必须在28至40秒之间，且作动电流不得超过0.5安培。
A. Thus, the more words there are in a cluster, the more difficult it is to understand.
B. Therefore, the more words are there in a phrase, the more difficult it is to understand.
C. So, the more nouns in a phrase, the harder it is to understand.
A. 所有发行物应使用统一的编号系统进行索引从而进行主题事项分配。
B. 所有出版物应使用标准编号系统进行索引和主题事项分配。
C. 所有发行物应使用标准的编号索引系统来完成主题事项分配。
A. The drain float valves in the vent tubes and the vent channels dilute the fuel in the vent system to drain out of the tank when the fuel face is lower than the valve.
B. The drain float valves in the vent tubes and the vent channels permit fuel in the vent system to drain into the tank when the fuel level is lower than the valve.
C. The drain float valves in the vent tubes and from the vent channels allow the fuel in the vent system to drain into the tank when the fuel quantity is lower than the valve.
A. The operator＇s maintencance organization must make sure that each aircraft has all inspection records.
B. Make sure that the required repair/alteration/inspection documents of each aircraft must be kept by maintenance organization of the operator.
C. Ensure that the operator＇s maintenance organization has retained the required maintenance/alteration/inspection records for each aircraft.
A. Finish stage 1 to 4 to ensure that no axial force is derived from the rod.
B. Do steps 1 thru 4 to make sure that no axial load is applied on the rod.
C. Procedures 1 to 4 are designed to check if the rod exerts axial force.
A. 留在部件上的溶剂可能导致腐蚀。
B. 留在部件上的密封胶能够引起侵蚀。
C. 部件表面的颗粒可能引起磨损。
A. 通气油箱排放单向活门允许通气油箱内的燃油流到1号或2号主油箱。
B. 通气油箱排放检查活门使通气油箱内的燃油流动于1号和2号油箱之间。
C. 通气油箱排放单向活门使通气油箱内的燃油流入1号及2号主油箱。
A. The auxiliary battery and auxiliary battery charger and the main battery connect together during non-normal conditions to help supply power.
B. In normal conditions,the auxiliary battery and auxiliary battery charger should be disconnected.
C. In non-normal conditions,the auxiliary battery and auxiliary battry charger should be disconnected.
