润滑垫圈的一侧。

A. 根据当地的正确程序使用或丢弃封严胶。

B. 遵守当地规定，正确使用或丢弃溶剂。

C. 遵守局方规定，正确使用或丢弃封严胶。

A. In these conditions, removal of the squibs from the fire extinguisher bottle is appropriate.

B. It is dangerous to remove the cartridges from the fire extinguisher bottle except under these conditions.

C. In these conditions, it is dangerous to remove the cartridges from the fire extinguisher bottle.

A. Be sure that the hose is not blocked.

B. Make sure that the tubes have no deformation.

C. Ensure that the pipes are not damaged.

A. IAS shall be monitored continuously until the end of the test.

B. Monitor the speed indication as long as the test continues.

C. Monitor the speed indication continuously until the end of the test.

A. 涂料足够柔软，用塑料铲子将其去除。

B. 涂料足够柔软，用塑料楔子将其去除。

C. 涂料足够柔软，用胶铲子将其去除。

A. The power plant uses an air vent or propeller to produce power.

B. The power plant develops thrust either through the exhaust or through a propeller.

C. The power plant generates propulsion with the aid of the exhaust or a propeller.

A. 不要用手辅助低压压气机的运动。如果这样做，低压压气机可能会导致人身伤害并损坏设备。

B. 不要用手阻止低压压气机的运动。如果这样做，低压压气机可能会导致人身伤害并损坏设备。

C. 不要用手移动低压压气机。如果这样做，低压压气机可能会导致人身伤害并损坏设备。

A. Two systems can be energized at a time.

B. Two systems can be engaged at the same time.

C. Two systems can be adopted separately.

A. It changed the volts in the transmitter

B. It changes the electrical currents in the transmitter.

C. It changed the electronic currents in the reciever.

A. Each section shall be started on a right-hand page.

B. Each section shall be stated on a left-hand page.

C. Each section shall be proceeded from a right-hand column.