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（1）越高，屏幕上图像的闪烁感越小，图像越稳定，视觉效果也越好。当前PC中该指标大多采用（2）Hz。 空白（1）处应选择（）
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《计算机软件产品开发文件编制指南GB8567-88》是（）标准，违反该标准而造成不良后果时，将依法根据情节轻重受到行政处罚或追究刑事责任。
（）把整个软件开发流程分成多个阶段，每一个阶段都由目标设定、风险分析、开发和有效性验证以及评审构成。
共用题干题企业信息资源集成管理的前提是对企业（1）的集成，其核心是对企业（2）的集成。 空白（1）处应选择（）
A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication, TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocolis to create a (2) and error-control mechanism at the transport level. TCP uses a sliding(3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve(4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver. 空白（1）处应选择（）
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