The primary function(s) of an automatic sprinkler system is(are) to（）.
A. extinguish the fire which triggers it
B. limit the spread of fire and control the amount of heat produced
C. protect people in the areas which have sprinkler heads
D. alert the crew to the fire
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液舱是用来装燃油、淡水、液货、压载水的舱室。由于其液体密度较小，一般设在船的低处，其主要目的为（）
A. 利于船舶浮性
B. 便于货物装卸及使用调配
C. 便于安全管理
D. 利于船舶稳性
买卖合同规定：“交货数量5000吨，2009年9月或10月份装运”，那么在9月1日至10月31日这段时间内任何一天将货物装运出口都可以，但不得分批装运。
A. 正确
B. 错误
A new router is added to an existing HSRP standby group. One of the existing routers is in anactive state， the other is in a standby state. Under what circumstance will the new router becomethe active router？（）
A. The new router will become active immediately because it’s the newest router introduced intothe group
B. The new router can become active only when the existing active router and the existing standbyrouter become unavailable
C. The new router has a lower priority value
D. The new router will never become active unless the existing active router becomes unavailable
E. The new router has preempt configured and a higher priority
F. The new router has a higher priority value
二人作业时必须有一名安全负责人。
A. 正确
B. 错误
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