下面哪些特性是调节层所具有的：

如果在图层上增加一个蒙板，当要单独移动蒙板时下面哪种操作是正确的：

Photoshop中当前图像中存在有一个选择区域，但“编辑”菜单中的“填充”命令无法被激活，其原因可能是下列哪几项。()

在Photoshop中背景层与新建图层的区别是()

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