在层次网络体系结构中,第n层协议利用 (2) 提供的服务向 (3) 提供服务,对等实

题型:单项选择题

问题:

在层次网络体系结构中,第n层协议利用 (2) 提供的服务向 (3) 提供服务,对等实体是指 (4) ,数据在同一个系统自上层传到下层,这种数据格式称为 (5) ,某层实体接收到上层传来的数据后,一般要 (6) 才能使接收方知道如何处理。

A.加上PCI
B.减去PCI
C.加上CRC码.
D.检查CRC码

考点:计算机软件水平考试中级网络工程师中级网络工程师上午试题
题型:单项选择题

如图所示,表示磁场B、电荷运动方向v和磁场对电荷的作用力F的相互关系图中正确的是 

题型:单项选择题

心理冲突的变形是()。

A.道德性的

B.精神病性的

C.现实性的

D.神经症性的

题型:单项选择题

第二节:任务写作

The 90s generation are believed to be with a practical mind.They pay more attention to be quality of life and know what they are living for:the wonderful life,the promising jobs,splendid days...Having more opportunities to touch the new,the 90s generation are showing stronger sign to try what they have never touched.When chatting on QQ,they frequently use the marks called“words of the Mars”,which were hard to understand for the other generations,obviously hoping to unique.They did this so as to protect their privacy and only share the secrets with their peers.

But at the same time,a few of the young guys can not refuse the temptation(诱惑)and become addicted to computer games.Being confident and outing,the 90s generation decorate themselves more vividly inwardly and outwardly,even mad to show their different qualities to unique self-identity.Having their own opinions in their own eyes,the 90s generation can speak out their doubts about the unreasonable sayings and regulations straightforward.

But on the other hand,the pressure of study on them grow

heavier because of several changes of educational reform in recent years accordingly and higher expectatation from their parents.In a word,the 90s generation are facing more challenges as well as opportunities than other generations to prepare themselves for the future.

【写作内容】

1.以约30个词概括短文的内容要战点;

2.然后以约120个词就”the 90s generation”这一主题发表看法,包括如下要点;

1)作为20后的一名青少年,你认为哪个时代特征在你身上有明显的体现?

2)这个特征对你自己将来的发展有何利弊?

【写作要求】

1.作文中可使用自己的亲身经历或虚构的故事,也可以参照阅读材料的内容,但不得直接引用原文中的句子;

2.作文中不能出现真实姓名和学校名称.

【评分标准】

概括准确,语言规范,内容合适,篇章连贯.

题型:单项选择题

结核性腹膜炎的主要感染途径是

A.经口
B.经淋巴管道
C.腹腔病变直接蔓延
D.经血液循环
E.腰椎病变直接蔓延

题型:单项选择题

聚合物的生物降解主要是()进攻分子骨架的葡萄糖单元而产生破坏降解。

A、发酵细菌

B、原油

C、表面活性剂

D、注入水

更多题库