入侵报警系统所使用的设备,其平均无故障间隔时间(MTBF)不应小于5000h。系统验收后首次故障时间应大于2个月。
1、正确错误
暂无解析
若想增加一个图层,但在图层调色板的最下面NEWLAYER(创建新图层)的按钮是灰色不可选,原因是下列选项种的哪一个(假设图象是8位/通道)()
特种设备生产单位()生产许可证的,责令停止生产,处五万元以上五十万元以下罚款;情节严重的,吊销生产许可证。
Directions:
Thissectionistotestyourabilitytounderstandshortdialogues.Thereare5recordeddialoguesinit.Aftereachdialogue,thereisarecordedquestion.Boththedialoguesandquestionswillbespokenonlyonce.Whenyouhearaquestion,youshoulddecideonthecorrectanswerfromthe4choicesmarkedA,B,CandDgiveninyourtestpaper.ThenyoushouldmarkthecorrespondingletterontheAnswerSheetwithasinglelinethroughthecenter.
1、A.Thereisnopaper.
B.Themancanusetheprinter.
C.Theprinterdoesn'twork.
D.Themanhastopayfirst.
2、A.Hehasgotanewjob.
B.Hehasgotapayrise.
C.Hehasbeenpromoted.
D.Hehasboughtanapartment.
3、A.Sellacar.
B.Rentacar.
C.Repairacar.
D.Buyausedcar.
4、A.Hedoesn'tlikethecolor.
B.Hedoesn'tlikethestyle.
C.Itistoosmall.
D.Itisofpoorquality.
5、A.Thechiefengineer.
B.Thereceptionist.
C.Theofficesecretary.
D.Thesalesmanager.
堤身填筑技术要求是()。
下列()不是水利水电施工组织设计文件的内容。