单选
●The World Wide Web is the l
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●The (75) h
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- braries. (75) A．appli
- cation
- B．information system
- C．network
- D．operating system
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●Communic
- ation networks can
- be
- classifie
- d in terms of their physical arrangement or (73) Three common (73) are the star,bus,and ring. (73) A．structures
- B．topologies
- C．protocols
- D．frames
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●
- An operating system is&n
- bsp; (74) . (74) A． the highest layer of software
- B． the lowest layer of software
- C． the highest layer of har
- dware
- D． the lowest layer of hardware
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●Theb
- asic concept of a data&n
- bsp;(72) is the differen
- ce between
- data and information. (72) A．warehouse
- B．storage
- C．base
- D．service
-
●Function
- al testing tests whether the output is the expected&n
- bsp;(71) with the valid input. (71) A．reason
- B．result
- C．outcome
- D．record
-
●
- A firewall is a&n
- bsp;(68) system designed to (69) all organization,s network aga-inst threats. (68) A．operating
- B．programming
- C．security
- D．service (69) A．prevent
- B．protect
- C．develop
- D．exploit
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●You c
- an cut，copy,and paste information quickly
- by
- clicking (67) bar buttons with the mouse. (67) A．title
- B．tool
- C．status
- D．for mula
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●The World Wide Web is the l
- atest evolution of an effort to make information on computers&n
- bsp;(66) the world available to as many users as possible. (66) A．through
- B．throughout
- C．by
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