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Studentswhogotostudyabroadoftenexperienceatypeofcultureshockwhentheyarriveinthenewcountry.____whichtheytookforgrantedintheirownsocietymaynotbefollowedinthehostcountry.Eveneverydayoflifemaybedifferent.Whentheseareaddedtotheinevitabledifferenceswhichoccurineverycountrystudentsmayatfirstfeel_.Theymayexperiencerapidchangeofmood,orevenwanttoreturnhome.However,moststudentssoonmakenewfriendsand,inarelativelyshortperiod,areableto_theirnewenvironment.Theymayevenfindthattheyprefersomeaspectsoftheirnew____andforgetthattheyarenotathomeforawhile!

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IntheWest,itisvery____forhighschoolstudentstohaveajobwhiletheyaregoingtoschool.Teenagersliketomanyexpensiveactivitieslikesports,travelingandforth.Sotheyrequiremoremoneythantheirparentswouldgivethem.Toearnsomeextramoneyfortheirownandalsomaybetosavesomemoneyforcollegeoracar,theywilltrytofindapart-timejob.Thetypesofworkthatareopentothemusually_yardwork,babysitting,bagginginagrocerystore,workinginamovietheater,workingasasalesclerk,orworkinginafastfoodrestaurantlikeMcdonald’s.By_intheirfreetime,thesestudentscanmakesomepocketmoney,gainsocialexperienceandgetbetterpreparedfortheirfuture.

Incomputing,passwordsarecommonlyusedtolimit__toofficialusers.Yetthewidespreaduseofpasswordshasseriousproblems.Officeworkersnowhavetorememberan_oftwelvesystempasswords.Intheorytheyshouldusedifferentpasswordsforeachsite,butthesewouldbeimpossibletoremember.Somanypeopleusethesamepasswordforall.Anadditionalproblemisthatthemajorityusesimplewordssuchashello,ornamesoffamilymembers,insteadofmoresecure_ofnumbersandletters,suchas6ANV76Y.Thispermitscomputerhackers(黑客)todownloaddictionaries,whichwillquicklyfindthewordandallowthemaccess.Therefore,itisclearthattheideaofpasswords,whichhavebeenusedas___devicesforthousandsofyears,mayneedrethinking.

使用FORMAT命令加参数S,在硬盘上不会产生的文件是

A. COMMAND.COM
B. IO.SYS
C. AUTOEXEC.BAT
D. MSDOS.SYS

下列硬件故障诊断方法中，哪一个不可取()

A. 插拔法
B. 替换法
C. 隔离法
D. 反复开关机