不在存储器中的频率调谐时间通常为2到4秒，最大为7秒。

A. 系统中用于指示燃油流量、温度和压力的部分，包括传感器、指示器等。

B. 系统中用于指示燃料使用量、温度和压力的部分。包括变送器、指示器等。

C. 系统中用于指示燃料流量、温度和压力的部分。包括变换器、指示器等。

A. Use protective goggles when you do work on fire extinguishers.

B. Ensure that you wear protective clothes while performing tasks on fire extinguishers.

C. Use protective gloves when working on fire extinguishers

A. Warnings, cautions and notes may be used to highlight or repeat important points.

B. Warnings, cautions and notes may be used to highlight or emphasis important points.

C. Warnings, cautions and notes may be used to highlight or emphasize important points.

A. 加入溶剂使油漆变得更稀薄。

B. 加入溶剂使油漆变得更稳定。

C. 在油漆里加入更多溶液。

A. When fuel comes out, you should perpare for fire eliminating.

B. It is necessary to exterminate fire properly when fuel starts to leak.

C. Use a fire extinguisher immediately if there is fuel leakage.

A. Always use test element that can cause sparks.

B. Never use test equipment which can cause cracks.

C. Do not use test equipment that can cause sparks.

A. The main oil/fuel heat exchanger uses the low temperature of the scavenge oil to reduce the fuel flow from the low pressure fuel pump.

B. The main oil/fuel heat exchanger uses fuel from the low pressure fuel pump to decrease the temperature of the scavenge oil.

C. The main oil/fuel heat exchanger sends fuel from the low pressure fuel pump to the scavenge oil lines to decrease the oil temperature.

A. 这意味着对部件和设备周围区域的检查将包括使用观察和评估的方式。

B. 这意味着检查将包括对部件周围的区域进行的观察和评估，以及对设备的检查。

C. 这意味着检查将包括对部件及设备周围区域进行的观察和评估。

A. 拆下螺栓和止动块。

B. 拆下螺帽和挡板。

C. 拆下螺钉和螺帽。

A. 因为轴的损坏，导致泵不运转。

B. 由于泵的设计问题，导致其停止运转。

C. 泵运转失常的原因在于叶轮的损坏。