Which of the routine maintenance procedure listed is required for starting air receivers?（）
1、Routine maintenance on a Central Contr
Routine maintenance on a Central Control Room hermetically sealed air conditioning unit should include （）Achanging the air filterBrecharging the systemCchanging compressor lubricantDrenewing container vacuum
2、Which of the routine maintenance proce
Which of the routine maintenance procedures listed is required for starting air receivers?（）Aover-speedingBoverloadClow exhaust temperatureDhigh crankcase pressure
3、Of which of the following did the auth
Of which of the following did the author provide a guardedly optimistic view?A［A］GDP growth.B［B］The number of layoffs.C［C］Price indexes.D［D］Output of consumer goods.
4、Which of the following is true of the
Which of the following is true of the OECD report?AIt criticizes government-funded research.BIt introduces an effective means of publication.CIt upsets profit-making journal publishers.DIt benefits scientific research considerably.
5、Improper maintenance of the fuel oil b
Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）Aincreased fuel consumptionBincreased feed water consumptionCfuel pump failureDcombustion control system failure
During routine maintenance， G1/0/1 on DS1 was shutdown. All other interface were up. DS2 becam...