单项选择题

Each fire hydrant serving machinery spaces containing oil fired boilers，internal combustion machinery，or oil fuel units must be equipped with a（）.

A.fireman's outfit
B.low-velocity spray applicator
C.marine strainer
D.pick axe

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Each fire hydrant must have at least one spanner and at least one（）.

A.hose rack or reel
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C.instructed in the use of life jackets
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