在企业对资源的平衡利用上主要表现为：（）。 A.客户资源平衡 B.生产资源平衡 C.

关于儿童生长性颅骨骨折，下列哪项正确（）

A.多见于枕部

B.婴幼儿少见

C.不出现神经受损症状

D.若不伴有癫痫，可采用非手术治疗

E.若合并癫痫，手术治疗时可连同脑癫痫灶一同切除

血细胞比容指血细胞（）

A.占全血容积的百分比

B.占全血质量的百分比

C.与血清容积之比

D.与血管容积之比

E.与血浆容积之比

招聘公告属于交互型专题页

以下关于全冠牙体预备的说法中，正确的是（）

A.要去除腐质

B.要消除轴壁倒凹

C.要去除无基釉

D.进行预防性扩展

E.以上全对

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. communication channel access B. protocols
C. data channel D. public communication