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【单选题】
Your vessel is equipped with a fixed C0 2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）.A.
Use the C0 2 system and evacuate the engine room
B.
Use the fire main system and evacuate the engine room
C.
Evacuate the engine room and use the C0 2 system
D.
Evacuate the engine room and use the fire main system
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【简答题】If you decide to wear medical mask which is pleated and flat like this one, it is important to wear and (Q1) ____ it correctly. Otherwise, instead of protecting you, the mask becomes a source of infec...
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【单选题】Listen to the speech about the number of books published. Q: How many books are published each year?
A.
More than 1,600,000.
B.
470,000.
C.
Less than 1,600,000.
D.
339,000.
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【简答题】Fill in the blanks with what you have heard. If you decide to wear medical mask which is pleated and flat like this one, it is important to wear and (1) it correctly. Otherwise, instead of protecting ...
【简答题】7-2 图是一反应器温度控制系统示意图。试画出这一系统的方块图,并说明各方块的含义,指出它们具体代表什么?假定该反应器温度控制系统中,反应器内需维持一定温度,以利反应进行,但温度不允许过高,否则有爆炸危险。试确定执行器的气开、气关型式和控制器的正、反作用。
【单选题】Furthermore, we have seen the number of books sold increases dramatically.
A.
formal
B.
informal
【简答题】下图是一反应器温度控制系统示意图。 （1）试画出这一系统的方块图，指出各方块具体代表什么？ （2）指出该系统中被控变量、操纵变量、扰动变量各是什么？
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