Most medium and slow speed diesels are started by what medium?（）

Which of the following is false?（） 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