Personnel who are moving or handling material aboard ship sh

【名词&注释】

软组织损伤(soft tissue injuries)、平均值(average)、工作中的

[单选题]Personnel who are moving or handling material aboard ship should NOT follow which of the listed practices?

A. Signaling that all personnel are clear before lifting or lowering material
B. Examining material for sharp edges or protruding points before handling
C. Closing, tagging or securing valves that permit entrance of steam, water, or air into a fitting or other equipment
D. Throwing materials from high places to the deck

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举一反三：

[单选题]冷却法的灭火原理是降低燃烧物温度至______以下。

A. 闪点
B. 燃点
C. 自然点
D. 闪点和自然点的平均值

[单选题]When sailing ill cold zones,_______should be drained of water.

A. the ventilation pipe
B. the water line for fire fighting on the deck
C. the fuel oil line
D. the water supplying line in bath room

[单选题]不能使泵实际工作中的许用吸高增加的是( )。

A. 降低液温
B. 提高转速
C. 降低转速
D. 减小吸入管路阻力

[单选题]以下( )不属于慢性软组织损伤的特点。

A. 反复发作
B. 疼痛剧烈
C. 迁延不愈

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