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问题 单项选择题

在就餐服务中，斟酒服务叙述错误的是（）。

A.斟酒操作技术动作的正确、迅速、优美、规范，往往会给宾客留下美好印象

B.斟酒前，用干净的巾布将瓶口擦拭干净

C.斟酒服务时，服务员站在客人的左侧或右侧进行斟倒

D.斟酒的方法一般有两种，一种是托盘端托斟酒，一种是徒手斟酒

答案

参考答案：C

单项选择题

A transport layer protocol usually has several responsibilities．One is to create a process-to-process communication；UDP uses (1) numbers to accomplish this．Another responsibility is to provide control mechanisms at the transport level．UDP does this task at a very minimal level．There is no flow control mechanism and there is no(2) for received packet．UDP, however, does provide error control to some extent．If UDP detects an error in the received packet，it will silently drop it． The transport layer also provides a connection mechanism for the processes．The (3) must be able to send streams of data to the transport layer．It is the responsibility of the transport layer at (4) station to make the connection with the receiver, chop the stream into transportable units，number them，and send them one by one．It is the responsibility of the transport layer at the receiving end to wait until all the different units belonging to the same process have arrived，check and pass those that are (5) free, and deliver them to the receiving process as a stream．

（3）处应填（）。

A．jobs

B．processes

C．programs

D．users
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单项选择题

正常新生儿头与身体的比重为（）

A、1：3

B、1：4

C、1：5

D、1：6
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