第50題： 下列網(wǎng)絡(luò)互連設(shè)備中，屬于物理層的是()。
A.交換機(jī)
B.中繼器
C.路由器
D.網(wǎng)橋
答案解析與討論：m.xiexiliangjiufa.com/st/396247602.html

第51題： 在地址http://www.dailynews.com.cn/channel/welcome.htm中，www.dailynews.com.cn表示（  ），welcome.htm表示（  ）。
A.協(xié)議類型
B.主機(jī)
C.網(wǎng)頁文件名
D.路徑
A.協(xié)議類型
B.主機(jī)域名
C.網(wǎng)頁文件名
D.路徑
答案解析與討論：m.xiexiliangjiufa.com/st/3962522370.html

第52題： 在Linux中，要更改一個(gè)文件的權(quán)限設(shè)置可使用()命令。
A.attrib
B.modify
C.chmod
D.change
答案解析與討論：m.xiexiliangjiufa.com/st/396268259.html

第54題： Creating a clear map of where the project is going is an important first step.It lets you identify risks，clarify objectives，and determineiftheprojectevenmakessense.Theonlythingmoreimportantthanthereleaseplanisnottotakeittooseriously.
ReleaseplanningiscreatingagameplanforyourWebproject()whatyouthinkyouwantyourWebsitetobe.Theplanisaguideforthecontent，designelements，andfunctionalityofaWebsitetobereleasedtothepublic，topartners，orinternally.Italso()howlongtheprojectwilltakeandhowmuchitwillcost.Whattheplanisnotisafunctional()thatdefinestheprojectindetailorthatproducesabudgetyoucantaketothebank.
BasicallyyouuseareleasePlantodoaninitialsanitycheckoftheproject's()andworthiness.ReleasePlansareusefulroadmaps，butdon'tthinkofthemasguidestotheinterstateroadsystem.Instead，thinkofthemasthe()usedbyearlyexplorers--halfumorandguessandhalfhopeandexpectation.
It'salwaysagoodideatohaveamapofwhereaprojectisheaded
A．constructing
B.designing
C.implementing
D.outlining
A．defines
B.calculates
C.estimates
D.knows
A．specification
B.structure
C.requirement
D.implementation
A．correctness
B.modifiability
C.feasibilit
D.traceability
A．navigators
B.maps
C.guidant
D.goals
答案解析與討論：m.xiexiliangjiufa.com/st/396282725.html