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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

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第1题

Which of the following statements is true concerning the overall efficiency of air compres
sors?

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

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第2题

By far the greatest use is for diesel engine starting using air pressure of 25 bar or more
provided by _____.

A.rotary compressors

B.reciprocating compressors

C.centrifugal compressors

D.screw compressors

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第3题

The link aggregation protection of the ZTE PTN equipment can be classified into two mo
des: master/slave and load sharing. Which of the following descriptions is incorrect? ()

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.

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第4题

The ____ stage air compressors are widely used on board the ship.A.singleB.IIC.IIID.multip

The ____ stage air compressors are widely used on board the ship.

A.single

B.II

C.III

D.multiple

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第5题

During compressors running the accumulated moisture in the separators must be _____.A.drai

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

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第6题

Intercoolers installed on starting air compressors, reduce the possibility of__________.A.

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

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第7题

Compressed air is supplied by air compressors to______.A.the air receiversB.the starting v

Compressed air is supplied by air compressors to______.

A.the air receivers

B.the starting valves

C.the cylinder covers

D.the distributors

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第8题

To obtain maximum efficiency, two stage air compressors are usually _____.A.horizontally m

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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