A transport layer protocol has several responsibilities, One

【名词&注释】

数据流(data stream)、应用程序(application)、通风孔(vent)、端口号(port number)、经营场所(management place)

[单选题]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 protocol is 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.

A. B

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学习资料：

[单选题]当训练时间小于30min或长于30min时，各主要以什么方式供能（）

A. 糖，脂肪
B. 脂肪，糖
C. 糖，类脂
D. 糖，磷脂
E. 脂肪，脂肪

[单选题]“如切如磋，如琢如磨”出自（）。

A. A、《论语》B、《诗品》C、《昭明文选》D、《诗经》

[单选题]餐饮加工经营场所^{(management place)}防鼠常用的措施有：（）。

A. A、在场所的通风孔、排水孔应安装规格为1.3厘米ⅹ1.3厘米的防鼠网
B. B、房门下沿与地面的缝隙不得大于0.6厘米
C. C、饭厅、仓库门下部30厘米处加钉0.75毫米的镀锌（不锈钢）铁皮
D. D、以上都是

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