A. 正确 B. 错误
A. 由高电位端指向低电位端；电位降低 B. 由低度电位端指向高电位端；电位升高 C. 由高电位端指向低电位端；电位升高 D. 由低电位端指向低电位端；电位降低
A. passes over the stern of the towing vessel B. passes through chocks C. is attached to the disabled vessel D. All of the above
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