下列关于数据库管理系统 DBMS和操作系统之间关系的叙述中，不正确的是 ______。
A、DBMS是建立在操作系统之上的，是操作系统的用户D
暂无解析
在photoshop6中提供了哪些图层合并方式（）
钢丝绳的安全系数是（）。
Directions:
Inthissection,thereare10incompletesentences.Youarerequiredtocompleteeachonebydecidingonthemostappropriatewordorwordsfromthe4choicesmarkedA,B,CandD.ThenyoushouldmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.
21、62%ofthepeoplesurveyedsaidtheyalwaysavoided______theirsmartphonesduringmeals.
A.useB.usingC.touseD.used
22、TheHRdepartmentisacriticalpartofemployeewell-beinginanybusiness,nomatter______smallitis.
A.howB.whatC.whereD.which
23、Accordingtotheregulation,inspections______toensurethatthesystemsareingoodcondition.
A.demandedB.havedemandedC.bedemandedD.aredemanded
24、Beforeyouthinkaboutaskingforapromotion,makesurethateitherapositionopeningexists______anewpositionisneededtobecreated.
A.andB.norC.orD.but
25、ThetrafficwasmakingsomuchnoisethatIcouldn'thearwhathe______.
A.issayingB.wassayingC.hassaidD.willsay
26、Ourcompanycultureis______makesussuccessfulincreatingafriendlyandexcitingenvironment.
A.whereB.howC.whatD.why
27、Mostpeopleweregreatlyshockedbythenews______theITcompanyhadgonebankrupt.
A.whatB.howC.whyD.that
28、IwouldprobablytrytofindabetterjobifI______inyourposition.
A.amB.wereC.havebeenD.be
29、Ifyouare______busytoattendthemeeting,youcansendyourassistanttotakeyourplace.
A.veryB.soC.tooD.more
30、Ihadtowaitforanothertwomonthstobeabletohavethecar______.
A.fixingB.fixC.tofixD.fixed
Hamlet______byShakespeare.
根据《水利工程安全生产管理条例》规定，施工单位在使用施工起重机械和整体提升脚手架、横板等自升式架设设施前，应当组织有关单位进行（）。
