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问题 多项选择题

住宅专项维修资金的使用原则有（　）。

A．方便快捷

B．公开透明

C．平等

D．自愿

E．受益人和负担人相一致

答案

参考答案：A,B,E

解析：住宅专项维修资金的使用应当遵循方便快捷、公开透明、受益人和负担人相一致的原则，任何单位和个人不得挪作他用。

选择题

比例尺中最大的是（　　）

A．千分之一

B．万分之一

C．十万分之一

D．百万分之一
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单项选择题

Typically, these are concern with the establishment of (66) the network and with the control of the flow of messages across this channel. The provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. This means that they may use different programming languages and, more importantly, different forms of (67) interface between user(application)program, normally referred to, as application processes or APs, and the underlying communication services may be (68) For example, one computer may be a small single -user computer, while another may be a large (69) system. In the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s Systems Network.
Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples of Communication software packages produced by manufacturers to allow their systems to be int erconnected together. These proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. In an attempt to alleviate this problem, (70) , in the late 1970s, formulated a reference model to provide a common basis ( or the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one another.

A．DNA

B．SNA

C．the OSI

D．the ISO
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