简述与T细胞识别、黏附及活化有关的CD分子与其作用。

In information theory, "information" is regarded as knowledge which reduces or removes (71) about the occurrence of a specific event from a given set of possible events. The concept "event" is to be understood as used in the theory of probability. For instance, an event may be the occurrence of a (72) character or word in a given message or in a given position of a message.

In communication theory, channel is defined as that part of a communication system that connects the message source with the message sink. An encoder may be inserted between the message source and the input to the channel, and a (73) between the output of the channel and the message sink. Generally, these two units are not considered as being parts of the channel. In certain cases, however, they may be considered as pans of the message source and message sink, (74) . In information theory (75) to Shannon, the channel can be characterized by the set of conditional probabilities of occurrence of all the messages received at the message sink when a given message emanates from the message source.

（72）是（）

A.decided

B.determined

C.concrete

D.specific

促进胃排空的因素有（）。

A.迷走-迷走反射

B.壁内神经丛反射

C.肠-胃反射

D.迷走-迷走反射+肠-胃反射

E.迷走-迷走反射+壁内神经丛反射

今年5月22日，我国第四次珠蜂综合科考队的专家，再次对珠峰的高度进行测算，科考队必要的装备之一是氧气瓶，其氧气的作用是______．氧气与人体内葡萄糖（C₆H₁₂O₆）作用生成水和二氧化碳，提供人体所需的能量，写出该反应的化学方程式______．

工作许可管理制度规定，控制点为（）时，签发人必须现场确认已具备工作条件、安全质量的监理、监护人员已到位后许可工作

A.R点

B.W点

C.H点

D.S点