In which of the listed refrigeration system components does superheating of the refrigerant take place?()
A. Expansion valve
B. Evaporator
C. Drier
D. Receiver
查看答案
When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?()
A. cold fuel oil
B. low fuel oil pressure
C. low atomizing steam pressure
D. water in the fuel oil
按照矫正社会工作的()原则的要求,不能对犯罪性质相同的罪犯采用同一矫正模式。
A. 普遍化
B. 个别化
C. 可塑性
D. 区别对待
购买人没有明确的购买目的,看到周围的人购买,自己也跟着购买的需求,即为()。
A. 消费需求
B. 投资需求
C. 投机需求
D. 跟风需求
《煤矿矿井机电设备完好标准》中螺母紧固后,螺栓螺纹应露出螺丝2~4螺距。()
A. 正确
B. 错误