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读图，完成下列问题．

（1）图中阴影部分为我国四大工业基地，读图判断字母所代表的工业基地的名称：

A______，B______，

C______，D______．

（2）A、C两工业区都分布有钢铁工业，但建立的基础不同．A工业区建立钢铁工业的基础是：______；C工业区发展钢铁工业则是因其：______．

答案

（1）图中阴影部分为我国四大工业基地，A是辽中南工业基地，B京津唐工业基地，C是沪宁杭工业基地，D是珠江三角洲；

（2）A、C两工业区都分布有钢铁工业，但建立的基础不同．A工业区建立钢铁工业的基础是有丰富的煤铁资源；C工业区发展钢铁工业则是因其便利的交通和广阔的市场．

故答案为：

（1）辽中南工业基地；京津唐工业基地；沪宁杭工业基地；珠江三角洲；

（2）有丰富的煤铁资源；便利的交通和广阔的市场．

判断题

经济业务发生后，首先是由财会人员填制或取得原始凭证，经审核无误后，按照设置的会计科目，运用复式记账法，编制记账凭证，并据以登记账簿。( )
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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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