1942年，长沙英雄许光达在八路军担任什么职务？

阅读下列说明，回答问题1至问题3。

[说明]

在信息系统建设中，项目风险管理是信息系统项目管理的重要内容。项目风险是可能导致项目背离既定计划的不确定事件、不利事件或弱点。项目风险管理集中了项目风险识别、分析和管理。

[问题1]

风险是指某种破坏或损失发生的可能性。潜在的风险有多种形式，并且不只与计算机有关。信息系统建设与管理中，必须重视的风险有： (1) 、 (2) 、 (3) 等。

Ⅱ 语言知识及应用（共两节，满分35分）

第一节：完形填空（共10小题，每小题2分，满分20分）

阅读下面短文，掌握其大意，然后从21~30各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

When television first began to expand, very few of the people who had become famous as   21  announcers were able to be equally effective on television. Some of the difficulties they experienced when they were trying to   22 themselves to the new medium were technical. When   23   on radio, for example, they had become   24  to seeing on behalf of the listener. This art of seeing for others   25   that be announcer has to be very good at talking. In the case of television, however the announcer sees   26   with the viewer. His duty,  27  , is completely different. He is there to make sure that the viewer does not   28  any point of interest, to help him focus on particular things, and to help him   29   the images on the television screen.  30  his radio colleague, he must know the value of silence and how to use it at those moments when the pictures speak for himself.

21． A．television       B．advertisement   C．radio         D．newspaper

22． A．adopt         B．adjust          C．change         D．shape

23． A．working     B．listening      C．appearing     D．showing

24． A．practiced     B．experienced      C．determined       D．used

25． A．guarantees      B．means          C．convinces     D．warns

26． A．something      B．Everything   C．nothing        D．anything

27． A．Moreover   B．therefore      C．furthermore     D．nevertheless

28． A．miss          B．ignore         C．drop         D．catch

29． A．reveal        B．expose         C．understand       D．translate

30． A．Like       B．    Beside             C．Unlike         D．As

提供不可靠传输的传输层协议是：（）

A.TCP

B.IP

C.UDP

D.PPP

黏结剂的要求

列车的驾驶模式分为那几个？分别写出每个模式的中文全称。