【单选题】If the expansion of the size of a firm is responsible for a decline in average cost, then _______ are present.
A.
internal scale economies
B.
external scale economies
C.
product differentiations
D.
constant returns to scale
【单选题】If the superheat value of a thermostatic expansion valve is set too low, the _.
A.
the suction line will be abnormally cold and liquid may slug back to the compressor
B.
the suction line will be hot due to a reduced amount of refrigerant returning to the compressor
C.
the temperature of the refrigerant within the condenser will remain the same
D.
the temperature of the refrigerant passing through the sub-cooler will decrease
【单选题】If the water level dropped rapidly in the expansion tank of a closed diesel engine cooling water system, you should suspect a ______.
A.
loss of suction in the circulating pump
B.
leak in the primary cooling system
C.
broken raw water pump shaft
D.
burned or cracked piston in one cylinder
【单选题】下列何种情况致急性肺水钟时应用洋地黄最为适宜?( )
【多选题】申请复议的条件包括【】
A.
有明确的被申请人,有具体的复议请求和事实根据
D.
申请人是认为具体行政行为直接侵犯其合法权益的相对人