搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列选项中不属于结构化程序设计原则的是______。

A．可封装
B．自顶向下
C．模块化
D．逐步求精

答案

参考答案：A

解析： 结构化程序设计的思想包括：自顶向下、逐步求精、模块化、限制使用goto语句，所以选择A。

填空题

形成各种操作技能所不可缺少的关键环节是______。
查看答案
单项选择题

The metric assigned to each network depends on the type of protocol. Some simple protocol, like RIP, treats each network as equals. The ___44___ of passing through each network is the same; it is one ___45___ count. So if a packet passes through 10 network to reach the destination, the total cost is 10 hop counts. Other protocols, such as OSPF, allow the administrator to assign a cost for passing through a network based on the type of service required.A ___46___ through a network can have different costs (metrics). For example, if maximum ___47___ is the desired type of service, a satellite link has a lower metric than a fiber-optic line. On the other hand, if minimum ___48___ is the desired type of service, a fiber-optic line has a lower metric than a satellite line. OSPF allow each router to have several routing table based on the required type of service.

45（）

A．flow

B．hop

C．process

D．route
查看答案