航海英語應(yīng)急預(yù)案與EMS單項(xiàng)選擇題每日一練(2019.01.11)

來源：考試資料網(wǎng)

1 Which extinguishing agent is the best for use on electrical fires?（）

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2 Which precaution should be taken when testing a line throwing gun?（）

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3 When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.

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4 Which portable fire extinguisher is normally recharged in a shore facility?（）

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5 When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.

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