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【单选题】
In 1950 it was predicted that eight or ten electronic computers would be sufficient to handle all the scientific and business needs of the United States. Likewise, the chief executive officer of IBM advised the company not to invest time or money in developing computers because he foresaw a limited commercial market. But these predictions were proved totally inaccurate as the computer industry developed into a multibilliondollar business. Today the computer plays a vital role in the lives of many Americans and is seen as one of the greatest technological developments of all times. Since computers can handle large amount of data rapidly and efficiently, categorize, process, and report information for a variety of business operations, they, in fact, have a virtually unlimited capacity for producing business data. However, computers can't think, their role in business is limited to those areas in which they can process information more efficiently and effectively than human being. At the administrative level, managers decide how computers and humans can be used most effectively to perform. a particular business task. Computers have become an integral part of day-to-day business transactions as well as analytic tools for long range planning, research, and development. Even a small business can utilize computers by either purchasing a small unit known as a minicomputer, leasing one, or by timesharing. In a timesharing system, each user is regularly scheduled for time to use the computer system. A wide variety of businesses and individuals participate in timesharing computer system. By performing data processing tasks such as accounting and billing, computers are playing an increasingly important role in businesses. Currently, business are developing overall management information systems in which computers function as essential tools in solving problem and decisionmaking at all administrative levels. Since 1950s, the computer industry has ______.
A.
declined
B.
remained about the same
C.
increased tremendously
D.
increased slightly
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举一反三
【判断题】在电缆水平子系统中,信道最大长度不应大于100M。其中水平电缆长度不大于90M,两端的跳线不大于5M。
A.
正确
B.
错误
【单选题】局部放大图可画成视图、剖视、断面,它与被放大部分表达方式间的关系是( )
A.
必须对应一致
B.
有一定的对应关系,有时无关
C.
无对应关系,视需要而定
【判断题】在PPI通信中,主站使用指令NETR∕NETW进行网络读写,应先建立发送∕接收数据缓冲区。
A.
正确
B.
错误
【多选题】博看网2019版畅销期刊数据库可检索的刊物包括哪些( )?
A.
中国经济周刊
B.
北大商业评论
C.
中国社会科学报
D.
图书馆工作与研究
【判断题】在PPI通信中,主站使用指令NETR∕NETW进行网络读写,应先建立发送∕接收数据缓冲区。( )
A.
正确
B.
错误
【多选题】基于覆盖的频内切换可以用哪个事件判决()
A.
A1事件
B.
A5事件
C.
A2事件
D.
A3事件
【判断题】局部放大图可画成视图、剖视图或断面图,它与被放大部位的表达方法无关。
A.
正确
B.
错误
【单选题】下面说法不正确的是
A.
超短波治疗仪工作时,必须调谐。
B.
疖痈疾病首选超短进行治疗
C.
超短波可以治疗颅内压增高
D.
微波在治疗时,辐射器与人体表面距离是7—10cm左右
E.
微波的治疗剂量分为四个等级
【简答题】针对下面的一幅图,请您向自己提问下述问题: 1我现在看到的是什么蜡烛图形态? 2这根蜡烛图形态是什么技术意义? 3这根蜡烛线与之前的价格运动趋势有什么关系? 4最近或者更前期价格运动中可以发现什么重要的讯息?
【单选题】短波与超短波的治疗剂量分为( )
A.
一级
B.
二级
C.
三级
D.
四级
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