正确答案: A

1/4海里

题目：当艇筏上的遇难人员乘登完毕后，不应远离失事地点，一般划离难船：

解析：A

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举一反三的答案和解析：

[单选题]The purpose of treating the cooling water of the diesel engine is to______. I、 resist the scale formation in the cooling chamber II、lubricate the engine part II III、increase thermal capacity IV、 resist corrosion

I + IV

[单选题]What is the most advantage of the lean-combustion different from the routine combustion?

Lower holding time of Maximum temperature

[单选题]你驾驶的的机动船在宽阔水域航行，在正前方的两桅灯接近一直线，并见两盏舷灯，并存在碰撞危险，由于风浪，偶尔看不见红舷灯，你船应：

右转并鸣放一短声

[单选题]Springs in fuel injectors will become not strong enough to work because______.

long time in use