一台Windows 2000操作系统的节点主机要与SNA网中的一台大型机通_爱下问搜题

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问题单项选择题

一台Windows 2000操作系统的节点主机要与SNA网中的一台大型机通信，那么用来互联的设备应该选择______。

A．网桥
B．路由器
C．中继器
D．网关

答案

参考答案：D

解析：SNA是IBM公司开发的网络体系结构，在IBM公司的主机环境中得到广泛的应用。一般来说，SNA主要是IBM公司的大型机(ES/9000、S/390等)和中型机(AS/400)的主要联网协议。SNA最大的特色就是它的封闭性，它是IBM公司开发的专有协议。如果存在某一处于NT网下的Windows 2000操作系统的节点主机，则需要设备实现不同网络协议的互连，而网关一般须提供不同的网络协议之间的相互转换。

单项选择题

下列关于行政许可实施主体的表述中，正确的有( )

A．行政许可不能由法律、法规授权的具有管理公共事务职能的组织实施

B．行政许可只能由具有行政许可权的行政机关以自己名义实施

C．行政许可可以委托一般公民和社会团体实施

D．受委托的行政机关不可以转委托

完形填空

I was on a long drive last weekend and stopped for a rest．At that moment,I noticed a man in a wheelchair        by the stop sign．He held a sign in hand，      “Trying to make it home for the holidays”．I        looked away from it,because I had no        to give him．I watched as people drove by,and either ignored him or stared at him        he was a curiosity（怪人）of sorts．I felt really        for the poor man．
I know some people wouldn’t like to have the thought of        money to such strangers in the street,because they thought these people may use that money for drugs,alcohol,or some other undesirable（不良的）      ．I started to drive my car away but soon        ．Since I don’t usually have much cash on me,I        it would be a good idea to offer some food        ．So I asked him if he was        ．Hearing my words,he seemed shocked that someone        his well-being,but he happily        it．He said he would like a sandwich and a can of soda．
Inside the store,I bought a sandwich,soda,some water and chips．I        them to the new friend who was quite        to receive so many delicious foods．      the meal time ,I asked his name．He said he was called Chewie,and he was thankful for my help．I        him a Smile Card．He read it with a big smile and said,“I always        random（偶然）acts of kindness．”
As I drove away,I said a silent prayer（祈祷）that Chewie makes it home for the holidays,or at least he spends them somewhere safe and        ．

C．even though

C．turned around

A．brought about

B．talked about

C．cared about

D．thought about