真空粉末低溫貯槽的真空夾套的真空度下降到65Pa時，蒸發率增大，不經濟，應重新抽真空。
1、正確正確
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AsfarasAustraliancultureisconcerned,thehistoryofAustraliacanbedividedintothefollowingphaseswiththeexceptionof________.
Withthepublicationof(),TheodoreDreiserwaslaunchinghimselfuponalongcareerthatwouldultimatelymakehimoneofthemostsignificantAmericanwritersoftheschoollaterknownasliterarynaturalism.
“Thedignityofmovementofanicebergisduetoonlyone-eighthofitbeingabovewater.”This“iceberg”analogyisputforwardby().
OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.
Thatproposalisessentiallyirrelevant________theissueathand.
