题目内容

以下字段中在FDDI的MAC帧中含有,但802.5的MAC帧中没有的是( )。

A. 帧校验序列
B. 前导码
C. 帧控制字段
D. 帧状态字段

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下列叙述中正确的是( )。

A. 利用传统方式推广网站是效率最低的一种方法
B. 可以利用电子邮件宣传网站
C. 网站内容与网站建设没有太大的关联
D. 以上都不对

下列说法中错误的是( )。

A. FDDI中MAC帧的前导码P用以在收发双方实现时钟同步
B. FDDI和802.5的令牌帧中有优先位和预约位
C. FDDI协议规定发送站发送完帧后,可以立即发送新的令牌帧
D. FDDI标准规定使用集中式时钟方案

Industrial production managers coordinate the resources and activities required to produce millions of goods every year in the United Sates. Although their duties vary from plant to plant, industrial production managers share many of the same major responsibilities. These responsibilities include production scheduling, staffing, procurement and maintenance of equipment, quality control, inventory control, and the coordination of production activities with those of other departments.The primary mission of industrial production managers is planning the production schedule within budgetary limitations and time constraints. They do this by analyzing the plant’s personnel and capital resources to select the best way of meeting the production quota. Industrial production managers determine, often using mathematical formulas, which machines will be used, whether new machines need to be purchased, whether overtime or extra shifts are necessary, and what the sequence of production will be. They monitor the production nm to make sure that Ft stays on schedule and correct any problems that may arise.Industrial production managers also must monitor product standards. When quality drops below the established standard, they must determine why standards are not being maintained and how to improve the product. If the problem relates to the quality of work performed in the plant, the manager may implement better training programs, reorganize the manufacturing process, or institute employee suggestion or involvement programs. If the cause is substandard materials, the manager works with the purchasing department to improve the quality of the product’s components.Because the work of many departments is interrelated, managers work closely with heads of other departments such as sales, procurement, and logistics to plan and implement company goals, policies, and procedures. For example, the production manager works with the procurement department to ensure that plant inventories are maintained at their optimal level. This is vital to a firm’s operation because maintaining the inventory of materials necessary for production ties up the firm’s financial resources, yet insufficient quantities cause delays in production. A breakdown in communications between the production manager and the purchasing department can cause slowdown and a failure to meet production schedules. Just-in-time production techniques have reduced inventory levels, making constant communication among the manager, suppliers, and purchasing departments even more important. Computers play an integral part in this coordination. They also are used to provide up-to-date information on inventory, the status of work in progress, and quality standards.Production managers usually report to the plant manager or the vice president for manufacturing, and may act as liaison between executives and first-line supervisors. In many plants, one production manager is responsible for all aspects of production. In large plants with several operations-there are managers in charge of each operation, such as machining, assembly, or finishing. The passage is mainly about ()

A. the procedures for industrial production
B. the ways to raise working efficiency and productivity
C. the importance of coordination in production activities
D. the role of an industrial production manager

解释程序边逐条解释边逐条执行,不保留机器码的目标程序,编译方式是使用编译程序把源程序编译成机器代码的目标程序,并形成( )保留。

A. 机器码
B. 汇编程序
C. 机器程序
D. 文件

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