《本安体系》进入井工矿入井维修服务管理规定：维修电气设备时，必须对设备进行（）上锁，方可检修。

A、断电

B、验电

C、放电

D、挂牌

If you are caught in the left semicircle of a tropical storm，in the Southern Hemisphere，you should bring the wind（）.

A.On the starboard quarter，hold course and make as much way as possible

B.2 points on the port quarter，and make as much way as possible

C.On the port bow，and make as much way as possible

D.Dead ahead and heave to