AtechnicianistroubleshootingalaptopLCD,andwhenthecoverisopenednothingshowsonthescreen.Thenallofasuddenthescreencomesonandworksfine.WhichofthefollowingshouldthetechniciancheckFIRST?（）
A. Backlight
B. Inverter
C. Loosecable
D. Lidswitch
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HowdoestheERXEdgeRouterinteractwithsubscriberIPaddressesassignedbyanexternalDHCPserver?（）
A. Itmonitorsmessagesfromtheexternalserverandupdatestheroutingtableasneeded.
B. ItmaintainstheleasesfortheDHCPserverandreassignsaddressestonewsubscribers.
C. Itsendskeepalivestothesubscriberandmakestheaddressavailablewhenthesubscriberstopsresponding.
D. Itsendskeepalivestothesubscriberandremovesthehostroutewhenthesubscriberstopsresponding.
行政法是指调整（），规范和控制行政权的法律规范系统。
A. 行政关系
B. 社会关系
C. 法律关系
D. 一般关系
YourroutingtablecontainsfourstaticrouteswhichyouneedtoredistributetoyourOSPFpeers.Whichmethodwouldaccomplishthis?（）
ApplyanimportpolicytoOSPF;thiswillimportthestaticroutesintoOSPF
B. Applyanexportpolicytoprotocol"static";thiswillexporttheroutestootherprotocols.
C. Applyanimportpolicytotheforwardingtable;thiswillimporttheroutes,allowingthemtobeforwardedtoOSPFneighbors.
D. ApplyanexportpolicytoOSPF;thiswillexportthestaticroutestoyourOSPFneighbors.
Atechnicianistryingtoretrieveascrewthatfellinsideacaseandisjustoutofreach.WhichofthefollowingistheBESTproceduretoretrievethescrew?（）
A. Turnthecaseupsidedown,shakegentlyandletthescrewfallout.
B. Useashopvacuumtoretrievethescrew.
C. Usethehardwareabstractionlayer(HAL).
D. Useanextensionmagnet.
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