IDEF方法是美国空军针对计算机辅助制造工程项目中用于进行复杂系统分析和设计的方法，是在结构化分析方法基础上提出来的，其中对IDEFO描述不正确的是(3)。
- A．描述系统的功能活动及联系，建立系统的功能模型。即反映系统“做什么”的功能
- B．描述系统的信息及联系，建立系统的信息模型
- C．采用方框和箭头等简单图形符号描述系统的活动和数据流，描述活动所受的约束条件及实现机制
- D．采用严格的自顶向下、逐层分解的方式建立系统功能模型
-
(64)
- A．plane
- B．plant
- C．plate
- D．platform
-
(63)
- A．Web browser's
- B．terminal's
- C．emulator's
- D．network's
-
(62)
- A．direct
- B．navigate
- C．indicate
- D．go-on
-
(61)
- A．displaying
- B．illustrating
- C．drawing
- D．writing
-
(59)
- A．Optical fiber
- B．Coaxial cable
- C．Shielded Twisted-pair Cable
- D．Unshielded Twisted-pair Cable
-
In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
- A Web browser is simply a terminal emulator, designed to display text on a screen. The two essential differences between an ordinary terminal emulator and a Web browser are that the browser knows how to deal with(71), and that it has a mechanism for(72)gr
- A．superlinks
- B．links
- C．hyperlinks
- D．connections
-
(57)
- A．PPP
- B．PAP
- C．CHAP
- D．LCAP
-
(58)
- A．VLAN
- B．LANE
- C．VPN
- D．IPOA
-
(56)
- A．AAT
- B．NCP
- C．DNS
- D．DDN
-
In(66)the strength of the carrier signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address and conversely an address to an name.(68)is a three -way handshaking authentication protocol that it's packets are encapsulated in the point - to -point protocol.(69)is an approach that enables an ATM Switch to behave like a LAN switch.(70)is an guided media which is made of glass or plastic and transmits signals in the form. of light.
- A．FDM
- B．DSK
- C．FCK
- D．ASK
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