血清病A. 属Ⅰ型超敏反应性疾病B. 属Ⅱ型超敏反应性疾病C. 属Ⅲ型超敏反应性疾病
血清病
A. 属Ⅰ型超敏反应性疾病
B. 属Ⅱ型超敏反应性疾病
C. 属Ⅲ型超敏反应性疾病
D. 属Ⅳ型超敏反应性疾病
E. 不属于超敏反应性疾病
血清病
A. 属Ⅰ型超敏反应性疾病
B. 属Ⅱ型超敏反应性疾病
C. 属Ⅲ型超敏反应性疾病
D. 属Ⅳ型超敏反应性疾病
E. 不属于超敏反应性疾病
第1题
A.High pressure compressors are more efficient than low pressure compressors
B.Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit
C.Two stage compressors are generally more efficient than single stage compressors
D.The volumetric efficiency is decreased in multistage compressors
第2题
A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors
第3题
A.The load sharing protection mode can be classified into return mode and non-return mode.
B.Master/slave LAG protection mode can be classified into return mode and non-return mode.
C.The LAG aggregation mode of ZTE equipment can be classified into dynamic mode and static mode.
D.Currently, the 6300 equipment does not support master/slave LAG at NNI side.
第4题
The ____ stage air compressors are widely used on board the ship.
A.single
B.II
C.III
D.multiple
第5题
During compressors running the accumulated moisture in the separators must be _____.
A.drained off
B.collected
C.sent to the crankcases
D.separated with oil
第6题
Intercoolers installed on starting air compressors, reduce the possibility of__________.
A.dust entering the high pressure stage
B.lube oil carbonization
C.discharge pulsations
D.inter-stage vapor lock
第7题
Compressed air is supplied by air compressors to______.
A.the air receivers
B.the starting valves
C.the cylinder covers
D.the distributors
第8题
To obtain maximum efficiency, two stage air compressors are usually _____.
A.horizontally mounted
B.never fitted with intake filters
C.fitted with intercoolers
D.operated in an unloaded condition at all times
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