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问题 判断题

票据和结算凭证的金额、出票或者签发日期、收款人名称不得更改，更改的票据无效。( )

答案

参考答案：对

解析：[考点] 支付结算的基本要求
票据和结算凭证的金额、出票或者签发日期、收款人名称不得更改，更改的票据无效；更改的结算凭证，银行不予受理。

填空题

规定着一个国家各级、各类学校教育的系统，包括各级各类学校的性质、人物、入学条件、修业年限及其关系的制度叫______。
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单项选择题

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（）

A.numbers

B.connections

C.diagrams

D.resources
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