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问题 单项选择题

患儿，4岁。平素经常感冒，现证见面色苍白，畏寒自汗，气短懒言，肌肉松弛，舌质淡红，苔薄白，脉浮而无力。治疗首选方是

A．归脾汤

B．牡蛎散

C．玉屏风散

D．四君子汤

E．黄芪桂枝五物汤

答案

参考答案：E

选择题

When asked why he enjoys rock climbing so much,Bibby said,"It's basically like dancing on the rock.

It's a challenge________man against nature."[    ]

A. of

B. for

C. by

D. over
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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．communication channel access

B．protocols

C．data channel

D．public communication
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