When the refrigeration demand is small,_______.

A．the expansion valve will move toward the wide open position

B．the expansion valve will move toward the closing position

C．the feeler bulb will conveys the high temperature

D．the superheat degree will raise

[单选题]When adding oil to a refrigeration system, precautions must be taken to ensure thatA．the compressor suction pressure is not too highB．all air is purged from the pump and charging fittingsC．the high pressure cutout switch is held open to prevent accid

[主观题]Whentherearesmallchildrenaround,itisnecessarytoputbottlesofpillsoutof_____.(A)reach(C)hold(B)hand(D)place

[单选题]Whentherearesmallchildrenaround,itisnecessarytoputbottlesofpillsoutof_____.(A)reach(C)hold(B)hand(D)place

[单选题]If the minimum efficient scale of a single producer is small relative to th

[单选题]Demand for a good is most likely to be more elastic when:A.The good is a ne

[单选题]Demand for a good is most likely to be more elastic when:A.A lesser proport

[单选题]（ ）refers to when the goods are not full of a wholecontainer， the carrier s

[单选题]（ ）refers to when the goods are not full of a wholecontainer， the carrier s

[单选题]An analyst does research about the impact of gap between money demand and m

[单选题]If the refrigeration compressor crankcase is sweating, the cause may be due toA．a shortage of refrigerantB．the compressor running continuouslyC．liquid refrigerant returning to the compressorD．the compressor short cycling on the high pressure cutout