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单选题
Inspection of a Halon extinguisher involves checking the hose，handle，nozzle，and（）.
A
sight glass
B
weighing the extinguisher
C
service technicians report
D
last date it was charged
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单选题Which action is routinely performed at the annual servicing and inspection of a dry-chemical cartridge-operated portable fire extinguisher?（）A
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单选题After using a Halon extinguisher，it should be（）.A
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outsideB
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