74、在高压环境下工作时，应遵守安全注意事项。

Obey the safety precautions when you do work with high voltages.

When working with high resistances, you should follow the safety precautions.

The safety precautions are optional in an environment with high voltages.

正确答案：A

1406、航道与跑道中心线对齐。

1405、The Pl shows the remaining time to make the copy of the data.

1404、Relatively simple units may not require description and operation, and/or troubleshooting information.

1403、Calculate the number of shims that are necessary.

1402、This document gives the different torque values land the conditions where they are applicable.

1401、This system does not supersede the normal 6hannels o communication for items not covered by the CAP.

1400、向跑道进近过程中,航道指示器上的偏航指计指示飞行员必须向哪个方向操纵飞机。

1399、在补片表面施加重量以确保各部件正确粘接。

1398、Light Ll comes on in 3 seconds or less

1397、It is necessary to clean the filter periodically.