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单选题
A combination or all-purpose nozzle produces（）.
A
low-velocity fog only
B
a solid stream only
C
a solid stream and foam
D
a solid stream and fog
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单选题If a firefighting situation calls for low-velocity fog you would（）.A
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单选题The all-purpose nozzle will produce a fog spray when you（）.A
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push the nozzle handle forward as far as it will goD
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