56.“无风三尺浪”是指()。

A. 　 armed attack

B. 　 piracy

C. 　 abandoning vessel

D. 　 person overboard

A. 　浮心在稳心之上

B. 　重心在稳心之上

C. 　稳心在重心之上

D. 　重心和稳心重合

A. 　雷达单标方位

B. 　距离定位

C. 　无线电测向定位

A. 　疏忽和差错

B. 　基于知识的失误

C. 　紧张过度

D. 　茫然无措

A. 　 Emergency Position Indicating Radio Beacon

B. 　 Emergency Plan Indicating Radio Beacon

C. 　 Emergency Plan Information Radio Beacon

D. 　 Emergency Position Information Radio Buoy

A. 　总体积

B. 　雷达散射面积

C. 　雷达反射面积

D. 　雷达截面积

A. 　 The decision whether to follow the ADVICE still stays with the recipient.

B. 　 One does not necessarily have to carry out the ADVICE, but should consider it very carefully.

C. 　 One have to carry out the ADVICE, and should consider it very carefully.

D. 　 One does not necessarily have to carry out the ADVICE, and should not consider it carefully.

A. 　风向

B. 　潮流

C. 　人员漂流的方向

D. 　救助船舶的大小

A. 　生理枯竭

B. 　情绪衰竭

C. 　才智枯竭

D. 　价值衰落

A. 　①②

B. 　②③

C. 　③④

D. 　①②③④