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1、某簡單無向連通圖G的頂點數(shù)為n，則圖G最少和最多分別有( )條邊。

A.n,n2/2

B.n-1,n*(n-1)/2

C.n,n*(n-1)/2

D.n-1,n2/2

信管網(wǎng)參考答案：B

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2、根據(jù)漸進分析，表達式序列：n4, lgn, 2n, 1000n, n2/3, n!從低到高排序為( )。

A.Ign,1000n, n2/3, n4, n!, 2n

B.n2/3,1000n, lgn, n4, n!, 2n

C.lgn,1000n, n2/3, 2n, n4, n!

D.Ign, n2/3, 1000n, n4, 2n, n!

信管網(wǎng)參考答案：D

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3、采用DHCP動態(tài)分配IP地址，如果某主機開機后沒有得到DHCP服務(wù)器的響應(yīng)。則該主機獲取的IP地址屬于網(wǎng)絡(luò)( )。

A.202.117.0.0/24

B.192.168.1.0/24

C.172.16.0.0/16

D.169.254.0.0/16

信管網(wǎng)參考答案：D

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4、在瀏覽器的地址欄中輸入xxxyftp.abc.can.cn，在該URL中( )是要訪問的主機名。

A.xxxftp

B.abc

C.can

D.cn

信管網(wǎng)參考答案：A

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5、當修改郵件時，客戶與POP3服務(wù)器之間通過( )建立連接，所使用的端口是( )。

1)A.HTTP

B.TCP

C.UDP

D.HTTPS

2)A.52

B.25

C.1100

D.110

信管網(wǎng)參考答案：B 、D

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6、因特網(wǎng)中的域名系統(tǒng)(Domain Name System)是一個分層的域名，在根域下面是頂級域，以下頂級域中，( )屬于國家頂級域。

A.NET

B.EDU

C.COM

D.UK

信管網(wǎng)參考答案：D

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7、Regardless of how wellDesigned,Constructed,And testedA system orApplication mayBe, errors orBugs will inevitably occur. OnceA system hasBeen(1)，it enters operationsAnd support.

Systems support is the ongoing technical support for user,As wellAs the maintenance required to fixAny errors, omissions,or new requirements that mayArise.BeforeAn information systemCanBe(2), it mustBe in operation. System operation is theDay-to-day, week-to-week, month-to-month,And year-t-year(3)ofAn information system'sBusiness processesAndApplication programs.

Unlike systemsAnalysis,Design,And implementation, systems supportCannot sensiblyBe(4)intoActual phases thatA support project must perform. Rather, systems supportConsists of four ongoingActivities thatAre program maintenance, system recovery, technical support,And system enhancement.EachActivity isA type of support project that is(5)byA particular problem,event, or opportunity encountered with the implemented system.

1)A.designed

B.implemented

C.investigated

D.analyzed

2)A.supported

B.tested

C.implemented

D.constructed

3)A.construction

B.maintenance

C.execution

D.implementation

4)A.broke

B.formed

C.composed

D.decomposed

5)A.triggered

B.leaded

C.caused

D.produced

信管網(wǎng)參考答案：B 、A 、C 、D 、A

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