Fire resulting from spontaneous combustion are usually caused by the improper disposal of _______.

单选题

Fire resulting from spontaneous combustion are usually caused by the improper disposal of _______.

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单选题

When two fire teams are combating a fire simultaneously（同步）, they should _____.A. Never use different fire hose pressures B. Not use different sizes of fire hosesC. Not attack the fire from opposite（相反的） sides D. not wear protective clothing

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单选题

The fibers of cotton fire hoses ________ up enough water to keep them wet and protect them from the flames.

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单选题

__________ is the act performed by or resulting from saying something; it is the consequence of, or the change brought about by the utterance.

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单选题

If numbered, they should be numbered sequentially and need not follow the numbering in this Specification so as to avoid gaps resulting from Specification material not appropriate to the type of airplane.

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