由于要进行大型科学计算、信息处理、多媒体数据服务与视频服务,广域网需要能提供很高的带

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问题:

由于要进行大型科学计算、信息处理、多媒体数据服务与视频服务,广域网需要能提供很高的带宽。同时,计算机的数据传输又具有“突发性”的特点,因此可能带来通信子网暂时的与局部的【 】现象。

考点:计算机等级考试网络技术国家计算机三级(网络技术)78
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材料一:1929年10月24日的“黑色星期四”,当天,道琼斯工业指数暴跌,在28日的“黑色星期一”,股指更是狂泻13%,29日再跌22%。在接下来的3年里,美国股票市场缩水89%,当时,绝望的储户们狂敲银行的大门是常见的街景。1929年至1933年,美国的失业率从3%升至25%。来自于欧洲各国的投机资本都在萧条中蒸发,极度依赖出口贸易的国家都明显感受到了美国需求下降带来的寒流。

材料二:1933年3月4日,在早春的寒风中,罗斯福总统发表了20分钟讲演。“我相信,唯一让我们恐惧的就是恐惧本身,……这个国家现在需要行动,现在就开始的行动。”

材料三:2011年,无论对于中国还是全球,都将成为进入新世纪以来尤其是应对国际金融危机以来最为关键的一年。从全球来看,经过多方努力,全球经济形势逐步好转,但国际金融危机的深层次影响还没有完全消除,世界经济还没有步入稳步增长的良性循环,系统性和结构性风险仍然比较突出,国际经济环境不确定性依然较大。 ——摘自《经济参考报》

(1)材料一反映的经济危机在当时产生了怎样的影响?

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(2)罗斯福如何行动的?

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(3)如何面对全球危机?

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下列不是创伤后局部表现情况的是()。

A.休克皮温降低

B.疼痛、肿胀

C.伤口

D.创面

E.伤道

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对纤毛柱状上皮细胞形态叙述,正确的是()。

A.细胞呈圆锥形,顶端宽平

B.表面的有纤毛,HE染色为淡蓝色

C.细胞底部较尖

D.细胞核居细胞中下部

E.核膜两侧常与细胞边界重合

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《幼儿园工作规程》的颁布,标志着我国的学前教育进入一个新的阶段。()

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There is a difference between science and technology. Science is a method of answering (1) questions; technology is a method of solving practical problems. Science has to do with discovering the facts and relationships between (2) phenomena in nature and with establishing theories that (3) to organize these facts and relationships; technology has to do with tools, techniques, and (3) for applying the findings of science. Another (5) between science and technology has to do with the progress in each.

Progress in science (6) the human factor. Scientists, who seek to understand the universe and know the truth within the highest degree of (7) and certainty, cannot (8) their own or other people’s likes or dislikes or to popular ideas about the fitness of things. What scientists discover may shock or (9) people-as did Darwin’s theory of evolution. But even an unpleasant truth is (10) than likely to be useful; besides, we have the choice of refusing to believe it! But (11) so with technology; we do not have the choice of refusing to hear the sound produced by a supersonic aircraft flying overhead; we cannot refuse to breathe polluted air. (12) science, progress in technology must be measured (13) the human factor. The purpose of technology is to serve people—people (14) , not merely some people; and future generations, not merely those who presently wish to (15) advantage for themselves.

We are all familiar with the (16) use of technology. Many people blame technology itself (17) widespread pollution, resource depletion (枯竭) and even social decay in general—so much (18) the promise of technology is " (19) " That promise is a cleaner and healthier world. If wise applications of science and technology do not (20) a better world, what else will

6()

A.distracts

B.excludes

C.expels

D.disposes

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