The expansion valve used in a refrigeration system regulates the
A.superheat of the gas leaving the compressor
B.back pressure in the evaporator
C.temperature in the refrigerated space
D.degree of superheat of the gas leaving the evaporator
第1题:
The doctor told Penny that too much _____ to the sun is bad for the skin.
(A) exposure (B) extension (C) exhibition (D) expansion
选A
是暴露的意思。句子的意思是医生告诉他在太阳光下太久不好
第2题:
CompanycomwantstoapplyaPTFtothep5590system.Afterdoingapreviewinstall,theoutputshowsthereisinsufficientspaceinthe/usrfilesystem.Therootvolumegrouphasnoavailablephysicalpartitionsleft.Theydonotwanttoaddadditionaldiskdrivestothesystem,buthaveajfs2filesystemthatisonly8%used.Whatcouldtheydotoutilizespaceinthejfs2filesystemtoapplythisPTF?()
A.Backupthefilesystemandrecreatesmaller
B.Usethechfstoreducethefilesystemsize
C.Usecplvtocopyfilesystemtosmallersize
D.Usemigratepvtocopyfilesystemtosmallersize
第3题:
第4题:
关于全身适应综合征(GAS)叙述正确的是
A、应激原作用后,机体出现的快速动员期
B、GAS可分为三个时期
C、GAS体现了应激反应的全身性和特异性
D、在抵抗期中,以交感,肾上腺髓质兴奋为主
E、GAS是指警觉期
第5题:
The word "bonfire" ( Line 5, Para.3.) most probably means_______.( )
[A] success
[B] reduction
[C] faiiure
[D] expansion
第6题: