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【单选题】

Small quantities of flammable liquids needed at a work site should be().

A、used only under the supervision and direction of a ship's officer

B、tightly capped and stowed with other tools near the job site when securing at the end of the day

C、used only when a pressurized fire hose is laid out ready for immediate use

D、in a metal container with a tight cap

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第2题

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第3题

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第5题

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第7题

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第8题

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第9题

A、Quantity of fuel injected tends to be decreased  B、Quantity of fuel injected will always be increased  C、Start of injection tends to be advanced  D、Duration of injection will always greater  

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