When should distress flares and rockets be used （).

A.Immediately upon abandoning the vessel

B.Only when there is a chance of their being seen by a rescue vessel

C.At one hour intervals

D.At half hour intervals

请帮忙给出正确答案和分析，谢谢！

您可能感兴趣的试题

It can be inferred from the passage that lichens use less energy and grow more slowly when

答案解析
When used with reversing reduction gears, medium－speed diesel engines should be bolted to

答案解析
Trees should only be pruned （修剪, 整枝) when there is a good and clear reason for doing s

答案解析
The author believes that __________ .A.library resources should be used frequently and com

答案解析
Trees should only be pruned (修剪整枝) when there is a good and clear reason for doing s

答案解析
When he was a boy he used to go there and watch _____.A.to repair bicyclesB.bicycles to be repaired

答案解析
Which command should be used to capture network traffic between the localhost and a host named ‘webserver’?()

答案解析