超低空飞行的战斗机经常会影响居民生活，有时甚至会把居民家的窗户玻璃震碎，说明战斗

经受破坏性压力的个体，出现逢人就述说自己遭遇的行为，可推断其处在__________。

A．初始期

B．惊吓期

C．恢复期

D．康复阶段

（）收录周初至春秋中叶的诗歌共305篇。

常用来除去冰箱异味的物质之一是______．

在数据通信中，利用电话交换网与调制解调器进行数据传输的方法属于

A．频带传输

B．宽带传输

C．基带传输

D．IP传输

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. same B. similar C. different D. dependent