●The two goals of an operation system are（71）and efficiency.（71）A.convenienceB.quickC.optimizeD.standardize

题目

●The two goals of an operation system are（71）and efficiency.

（71）

A.convenience

B.quick

C.optimize

D.standardize

相似考题

1.● (71) now plays a central role in the global economy.A. Data B. CPU C. Information D. Operation

2.WebSQL is a SQL-like （71） language for extracting information from the web. Itscapabilities for performing navigation of web （72） make it a useful tool for automatingseveral web-related tasks that require the systematic processing of either all the links in a（73） , all the pages that can be reached from a given URL through （74） that match apattern, or a combination of both. WebSQL also provides transparent access to index servers thatcan be queried via the Common （75） Interface.（71）A. query B. transaction C. communication D. programming（72）A. browsers B. servers C. hypertexts D. clients（73）A. hypertext B. page C. protocol D. operation（74）A. paths B. chips C. tools D. directories（75）A. Router B. Device C. Computer D. Gateway

3.●SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment ．A varietion of the (71) protocol called NRM is essentially the same as SDLC．SDLC is (72) protocol like HDLC , Frame. Relay or X．25．An SDLC network is made up of (73) that controls all communications , and (74) ．It is capable of (75) operation, but almost all practical applications are strictly half duplex．(71) A．HDLCB．Frame. RelayC．X．25D．X．21(72) A．a peer to peerB．a point-to-pointC．not a peer to peerD．a peer to peers(73) A．a primary stationB．one or more primary stationsC．a secondary stationD．one or more secondary stations(74) A．a primary stationB．one or more primary stationsC．a secondary stationD．one or more secondary stations(75) A．half duplexB．full duplexC．half or full duplexD．half and full duplex

4.WebSQL is a SQL-like ___(71)___ language for extracting information from the web. Its capabilities for performing navigation of web ___(72)___ make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a ___(73)___ , all the pages that can be reached from a given URL through ___(74)___ that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common ___(75)___ Interface.(71)A. query B. transaction C. communication D. programming(72)A. browsers B. servers C. hypertexts D. clients(73)A. hypertext B. page C. protocol D. operation(74)A. paths B. chips C. tools D. directories(75)A. Router B. Device C. Computer D. Gateway

更多“●The two goals of an operation system are(71)and efficiency. (71)A.convenience B.quick C.o ”相关问题

  • 第1题：

    Electronic mail and filing permit a user to compose and transmit a message on an office(71)system. In the early 1970s, the ARPANET community developed a number of such systems which have been heavily used. Through standard message format(72), several hundred different computers and electronic mail interfaces are specification of how(73)and return addresses should appear on envelopes and which sizes are allowable for envelopes. In the electronic message world, they describe what(74)of characters are required at the(75)of a message to identify the sending and receiving mailboxes.

    A．robotization

    B．automation

    C．dynamic

    D．action


    正确答案：B

  • 第2题：

    以下程序段的输出结果为 ( )int j=2；switch(j){case 2：System.out.print("two.")；case 2+1：System.out.println("three.")；breakdefault：System.out.println("value is"+j)；break；}

    A．two.three.

    B．two.

    C．three.

    D．value is 2


    正确答案：A
    解析：该题测试的是考生对switch语句的掌握，执行时，swish语句根据表达式返回的值与每个case子句的值相比较。如果匹配成功，则执行该case子句后的语句序列，直到执行到break语句或switch语句结束，然后跳出switch语句。如果匹配不成功，则跳转到default语句。本题中的switch(2)应对应case2，所以输出"two."，但是它后面没有break，所以继续执行case2+1，输出"three."，这时遇到break，则跳出switch语句。所以本题选择A。

  • 第3题：

    SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment . A varietion of the (71) protocol called NRM is essentially the same as SDLC. SDLC is (72) protocol like HDLC, Frame. Relay or X.25. An SDLC network is made up of (73) that controls all communications, and (74) . It is capable of (75) operation, but almost all practical applications are strictly half duplex.

    A．HDLC

    B．Frame. Relay

    C．X.25

    D．X.21


    正确答案：A

  • 第4题：

    ) ● (71 now plays a central role in the global economy.

    (71)

    A. Data

    B. CPU

    C. Information

    D. Operation


    正确答案：C

    试题（71）参考译文
        现在，信息在全球经济中发挥着核心作用。
    参考答案
        （71）C

  • 第5题：

    编译和执行以下代码，输出结果是( )。 int i=1; switch (i) { case 0: System.out.print("zero,"); break; case 1: System.out.print("one,"); case 2: System.out.print("two,"); default: System.out.println("default"); }

    A．one，

    B．one,two,

    C．one,two,default

    D．default


    正确答案：C

  • 第6题：

    OSPF is a link-state routing protocol。It is designed to be run internal to a single __（71）__system。Each OSPF router maintains an identical __（72）__ describing the autonomous system’s topology。From this database，a routing table is calculated by constructing a shortest-path __（73）__。OSPF recalculates routes quickly in the face of topological changes，utilizing a minimum of routing __（74）__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided，enabling an additional level of routing protection and a reduction in routing protocol__（75）__。

    71

    A.autonomous

    B.network

    C.computer

    D.server


    正确答案：A
    OSPF是一种链路状态路由协议。该协议被设计成运行在单一的自治系统内部。每一个OFPF路由器都保持了同样的数据库，该数据库可以描述自治系统的拓扑图。通过该数据库，可以搭建的最短路径树以此计算路由表。OSPF在拓扑发生变化时，利用最小路由组播流量的快速重新计算路由。OSPF支持多条等价路径。OSPF提供区域路由的能力，在路由协议流量中赋予一个额外的路由保护和路由剪截能力。

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