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单选题
At the fire temperature set point, the gas expands more to close the FIRE pressure switch in the detector. This decreases the resistance further.
A
Set a point at the fire temperature ,the gas grows larger to close the FIRE pressure switch in the detector. This influences the resistance longer.
B
When the fire temperature is set at the point, the gas extends more to shut the FIRE pressure switch in the detector. This abates the further resistance.
C
At the fire temperature set point, the gas inflates further so as to close the FIRE pressure switch in the detector. This diminishes the resistance moreover.
答案解析
正确答案：B
