A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles ofA.waterB.babbittC.iron or steelD.acids
A magnetic strainer is used in the diesel engine reduction gear oil system to remove small particles of
A.water
B.babbitt
C.iron or steel
D.acids
相关考题：
importjava.util.*；classKeyMaster{publicinti；publicKeyMaster（inti）{this.i=i；}publicbooleanequals（Objecto）{returni==（（KeyMaster）o）.i；}publicinthashCode（）{returni；}}publicclassMapIt{publicstaticvoidmain（String[]args）{Setset=newHashSet（）；KeyMasterk1=newKeyMaster（1）；KeyMasterk2=newKeyMaster（2）；set.add（k1）；set.add（k1）；set.add（k2）；set.add（k2）；System.out.print（set.size（）+：”）；k2.i=1；System.out.print（set.size（）+：”）；set.remove（k1）；System.out.print（set.size（）+：”）；set.remove（k2）；System.out.print（set.size（））；}}Whatistheresult？（）
CompanycomwantstoapplyaPTFtothep5590system.Afterdoingapreviewinstall,theoutputshowsthereisinsufficientspaceinthe/usrfilesystem.Therootvolumegrouphasnoavailablephysicalpartitionsleft.Theydonotwanttoaddadditionaldiskdrivestothesystem,buthaveajfs2filesystemthatisonly8%used.Whatcouldtheydotoutilizespaceinthejfs2filesystemtoapplythisPTF?（）A.BackupthefilesystemandrecreatesmallerB.UsethechfstoreducethefilesystemsizeC.UsecplvtocopyfilesystemtosmallersizeD.Usemigratepvtocopyfilesystemtosmallersize
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下面能正确显示水分子表达式的选项为（）。A．H＜sub＞2＜/sub＞OB．H＜small＞2＜/small＞OC．H＜small＞＜sup＞2＜/sup＞＜/small＞OD．H＜small＞＜sub＞2＜/sub＞＜/small＞O
os的下列函数中，用来给文件重命名的是？A．rename()B．remove()C．listdir()D．system()