A、 Retesting and reviewing test results are optional due to discrepancies in the fuel/water sample and the ability of the detection kits to continuously measure the level of microbial growth.
B、 It is very important to do the test again and confirm test results because of differences in the fuel/water sample and the ability of the detection kits to continuously measure the level of microbial growth.
C、 It is mandatory to retest and evaluate test results to make sure the differences in the fuel/water sample and the ability of the detection kits to witness the level of microbial growth.
答案：B
A、 Retesting and reviewing test results are optional due to discrepancies in the fuel/water sample and the ability of the detection kits to continuously measure the level of microbial growth.
B、 It is very important to do the test again and confirm test results because of differences in the fuel/water sample and the ability of the detection kits to continuously measure the level of microbial growth.
C、 It is mandatory to retest and evaluate test results to make sure the differences in the fuel/water sample and the ability of the detection kits to witness the level of microbial growth.
答案：B
A. 用保险丝连接卡箍与控制杆拨叉确保安全。
B. 用保险丝穿过控制杆拨叉将夹块固定。
C. 用保险丝将夹块和控制杆固定在一起。
A. Get the approval of the design authority,whatever it is necessary to change the repair scheme.
B. Change the repair scheme, until getting the approval of the design authority.
C. If it is necessary to change the repair scheme, get the approval of the design authority.
A. 故障隔离手册提供信息用于识别，定位和修正任何故障,并需要放在飞机上。
B. 故障隔离手册提供用于识别的信息来定位和纠正可能在飞机上发生的任何故障的信息。
C. 故障隔离手册提供用于识别、定位和纠正可能在飞机上发生的任何故障的信息。
A. 氧气系统包括氧气瓶、释压阀、关断阀、出气口、调节器、面罩等。
B. 供氧系统包括氧气瓶、释放阀、截止阀、排气口、监管者、面罩等。
C. 供氧系统包括氧气瓶、开关阀、切断阀、紧急出口、调节器、面罩等。
A. 每个图形或表格数据应包括一个或多个正确使用数据展示的示例，除非其使用非常简单，不可能出现误用或误解。
B. 除非简单到不可能出现误解或误用，否则每个图或表格应至少给出一个数据使用示例。
C. 每个图形或表据展示应包括一个或多个正确使用数据展示的示例，除非其使用足够简单，不可能出现误用或误解。
A. 使用符号代表电磁活门，显示该活门是否是弹簧加载到开位或关位。
B. 应针对电磁活门标明注意事项，说明该活门应该弹簧加载到开位还是关位。
C. 电磁活门应标有符号，表明该活门是弹簧加载到开位还是关位。
A. 发动机附件冷却系统用于发动机舱及附件通风，包括阀门、管路、引射泵、涡流发生器等部件。
B. 发动机辅助冷却系统能帮助发动机及附件通风，包括阀门、波导设备、喷射泵、扰流器等组件。
C. 发动机辅助冷却系统用于发动机舱、活门、管路、引射泵、涡流发生器等附件通风。
A. On some turbopropeller powered airplanes, the condition lever is the primary control for starting and stopping the engine. On others, it is the primary control used to set engine and propeller speed.
B. On some piston powered airplanes, the condition lever is the secondary control for starting and shutting the engine. On others, it is the secondary control used to set engine and piston speed.
C. On some turbopropeller powered airplanes, the status lever is the secondary control for starting and shutting the engine. On others, it is the secondary control used to set engine and propeller speed.
A. 防腐可能有很多原因。
B. 腐蚀可能有很多原因。
C. 腐蚀可能有很多防腐措施。
A. 使用听筒侧面的按钮来调节音量。
B. 使用手机旁边的按键来适应体积。
C. 为了加大容量，使用手机侧面的旋钮。
