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【单选题】
Despite being as a meat eater ,the panda has a diet that is overwhelmingly vegetariansA.
voltage step
B.
sort
C.
classified
D.
kind
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举一反三
【单选题】What is the function of thermostatic expansion valve in a compression refrigeration system?
A.
nonexistent
B.
for controlling pressure
C.
for controlling superheat
D.
for controlling the solenoid valve
【简答题】Refrigeration system
【单选题】Which of the listed refrigeration system components keeps the refrigerant circulating through the system?
A.
Expansion valve
B.
Condenser
C.
Evaporator
D.
Compressor
【单选题】In the refrigeration system, the meat box temperature control circuit, as used in the ship service refrigeration system, is an example of _____.
A.
two position control
B.
single speed floating control
C.
proportional control
D.
reset control
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