简述节约资源的途径？

A. preparation for stand-by should be organized by engine room
B. engine trails should be agreed with bridge, and then do it
C. As to engine trials of the twin diesels and two propellers, the two diesels should use “slow ahead” at the same time
D. After engine trials, the handle of the engine telegraph should be put in the “stop” positio

A. 正确
B. 错误

A. 二个
B. 三个
C. 五个
D. 七个