决定局域网特性的主要技术要素是:网络拓扑、传输介质与______。A.数据库软件

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问题:

决定局域网特性的主要技术要素是:网络拓扑、传输介质与______。

A.数据库软件

B.服务器软件

C.体系结构

D.介质访问控制方法

考点:计算机等级考试网络技术计算机三级(网络技术)24
题型:单项选择题

海:水

A.写作:小说

B.太阳:光

C.画家:图画

D.旋律:音符

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细胞增殖周期依次经过哪几个期()

A.G0、G1、G2和M期

B.G1、S、G2和M期

C.S、G1、G2和M期

D.G1、G2、S和M期

E.G1、S、M和G0

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Crowd controls could soon become an important skill for climbers on Mount Everest, as important as physical strength or watching the weather. In a single day last week, nearly 40 people reached the top of the world --- a record. Reports from base camp spoke of queues at dangerous ridges and crowds as people passed each other in the final dash for the 8, 848 meters top.

More traditional mountaineers tease about the circus atmosphere surrounding Everest in re­cent years, and there are warnings that the crowds are making the mountain more dangerous. In 1996, 14 died on the mountain when the members of several groups were trapped at high altitudes by sudden snowstorms. Bad weather in early May led to this year’s jam on the summit ridge, but the loss, luckily, was light. Just four climbers died, in­cluding a Nepali Sherpa who had made 11 previous successful climbing.

Traditionalists are also worried about the growing tendency of climbers to set records and achieve “firsts”, rather than simply climb the mountain. This year’s crop of mountaineers included the oldest man, 64-year-old Sherman Bull from Connecticut, and the youngest, 16-year-old Temba Tsheri Sherpa of Nepal. An American with only one arm was on the mountain this year; an Indian with no legs also tried but failed. Erik Weihennieyer, an Ameri­can, became the first blind person to reach the top of the world. His fellow climbers stayed in front of him on the way up, describing the type of land and ringing bells.

Nepal(尼泊尔)views Mount Everest as something of a cash cow. The government charges journeys a minimum of $ 70,000. That is probably why officials in Katmandu are ignoring concerns about overcrowding and talking about even more climbers coming next year. But a celebration of the 48th anniversary of the first conquest of Everest, by Sir Edmund Hillary and Sherpa Tenzing Norgay, was cancelled after violent strikes. Tumultuous(动乱的)Nepali politics, it seems, could be just the crowd-control mea­sure that Everest needs.

小题1:What is the problem that the climbers have to face in recent years?

A.Bad Weather.

B.Technology.

C.Overcrowding.

D.Physical strength.小题2:What is the main idea of the second paragraph?

A.The risks of mountain climbing.

B.The consequence of overcrowding.

C.The challenge that climbers have to face.

D.The damage that snowstorms have caused.小题3:Several climbers are mentioned in Paragraph 3 to show ______.

A.their great courage

B.their common motivation

C.their different identity

D.their outstanding achievements小题4:What is the attitude of the Nepali government towards overcrowding?

A.Unconcerned.

B.Doubtful.

C.Disapproving.

D.Worried.

题型:单项选择题

关于债券的持续期的说法正确的是______。

A.债券的持续期又称久期

B.债券的持续期由马柯维茨提出

C.债券的持续期是一种测度债券发生现金流平均期限的方法

D.债券的持续期可以测度债券组合价值的利率敏感性

题型:单项选择题

肉桂中具有镇静、镇痛、解热作用的有效成分是()

A.苯甲醛

B.桂皮酸

C.桂皮醛

D.乙酸桂皮酯

E.香豆素类

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