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根据短文回答 23~30 题。 Science Fiction 1 Amongst the most popular books being writte

根据短文回答 23~30 题。

Science Fiction

1 Amongst the most popular books being written today are those which are usually Classified as science fiction. Hundreds of titles are published every year and are read by all kinds of people. Furthermore, some of the most successful films of recent years have been based on science fiction stories.

2 It is often thought that science fiction is a fairly new development in literature, but its ancestors can be found in books written hundreds of years ago. These books were concerned with the presentation of some form. of ideal society, a theme which is still often found in modern stories.

3 Most of the classics of science fiction, however, have been written within the last hundred years. Books by writers such as Jules Verne and H.G. Wells, to mention just two well-known authors, have been translated into many languages.

4? Modern science fiction writers don't write about men from Mars (火星) or space adventure stories. They are more interested in predicting the results of technical developments on society and the human mind; or in imagining future worlds which are a reflection of the world which we live in now. Because of this their writing has obvious political undertones (涵义).

5? In an age where science fact frequently overtakes (超过) science fiction, the writers may find it difficult to keep ahead of scientific advances. Those who are sufficiently Clear-sighted to see the way we are going, however, may provide a valuable lesson on how to deal with the problems which society will inevitably face as it tries to master its new technology.

第 23 题 Paragraph 2_______

A.Popularity of Science Fiction

B.A Fairly New Development

C.Classics of Science Fiction

D.Difficulty in Keeping ahead of Scientific Advances

E.Origins of Science Fiction

F.Themes of Modern Science Fiction

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更多“根据短文回答 23~30 题。 Science Fictio…”相关的问题

第1题

关于承载控制协议MGCP和H.248,下列说法正确的是()。

A.MGCP和H.248协议中MGC与MG之间都是控制与被控制的主从关系

B.MGCP和H.248协议消息编码都可以采用二进制或文本方式

C.MGCP协议和H.248协议的网关在注册后都需要进行网关的初始化流程

D.与MGCP协议只能承载在UDP/TCP上不同,248可以承载在UDP/TCP/SCTP上传送

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第2题

MGCP协议中,请简述一个MG网关向MGC注册的消息流程。
点击查看答案

第3题

在MGCP协议消息包中代表“挂机迁移”的事件名是()。

A.HU

B.HD

C.HF

D.DL

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第4题

关于H.248协议的描述错误的是()

A.H.248和MeGaCo是同一种协议的两个名称而已,是ITU与IETF共同制定的,ITU-T称之为H.248,而IETF则称之为MeGaCO

B.H.248协议是在MGCP协议的基础上,结合其它媒体网关控制协议特点发展而成的一种协议

C.H.248信令消息有UDP/TCP/SCTP/ATM等多种承载方式,使传输更可靠,而MGCP则只能承载在宽带IP网络上的UDP格式

D.H.248协议消息编码可以采用二进制或文本格式,现在只支持二进制

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第5题

在FTP应答消息中,表示命令正常执行的代码是()。

A.200

B.220

C.331

D.500

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第6题

关于网关控制协议叙述正确的是()。

A.H.248和MeGaCo是同一种协议,是ITU与IETF共同努力的结果,ITU-T称之为H.248,而IETF称为MeGaCo。

B.H.248协议是在MGCP协议的基础上,结合其它媒体网关控制协议特点发展而成的一种协议。

C.MGCP协议描述能力有欠缺,限制了其在大型网关上的应用。对于大型网关,H.248协议是一个好的选择。

D.MGCP消息传递依靠承载在宽带IP网络上的UDP数据包,而H.248信令消息可基于UDP/TCP/SCTP等多种承载。

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第7题

在OpenFlow协议中,下列哪个消息类型不属于Controller-to-Switch消息?

A.OFPT_FEATURES_REQUEST

B.OFPT_PACKET_OUT

C.OFPT_FLOW_REMOVED

D.OFPT_FLOW_MOD

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第8题

在OpenFlow协议中,下列哪个消息类型不属于Asynchronous消息?

A.OFPT_PACKET_IN

B.OFPT_PORT_STATUS

C.OFPT_FLOW_REMOVED

D.OFPT_PORT_MOD

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第9题

在OpenFlow协议中,下列哪个消息类型属于Asynchronous消息?

A.OFPT_HELLO

B.OFPT_SET_CONFIG

C.OFPT_PORT_STATUS

D.OFPT_FEATURES_REQUEST

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第10题

在MGCP协议消息包中代表“挂机迁移”的事件名是()。

A.HU

B.HD

C.HF

D.DL

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