邓 * * 强调,“特区是个窗口,是技术的窗口,管理的窗口,知识的窗口,也是()的窗口”。

题型:单项选择题

问题:

邓 * * 强调,“特区是个窗口,是技术的窗口,管理的窗口,知识的窗口,也是()的窗口”。

A.改革开放

B.经济发展

C.对外政策

考点:广东知识竞赛广东省社会科学普及条例广东省社会科学普及条例题库
题型:单项选择题

某顺直河段平均水深2.5m,宽40m,浮标在该河段漂行20m时用时10s,该河段流量为

A、100m3/s

B、70m3/s

C、50m3/s

D、以上均不对

题型:单项选择题

美国华盛顿大学研究人员在《科学》杂志上发表报告说,尽管人类活动对于气温的全面上升确实起了作用,但这种气候变化绝大部分要归咎于自然原因。他们对北半球近一个世纪以来的温度变化所作的详细研究的结果表明,联合国和其他国际组织近来在一些报告中对全球气温变暖原因的解释是靠不住的。 报告的主要作者,担任华盛顿大学的国家海洋和大气管理局大气和海洋联合所所长的约翰华莱士说:“我们所作的研究已经清楚地表明,全球气候的不断变化是怎样引起气候的短期变动的。反过来,这种变动又有助于我们更好地了解大气层的温室效应(大部分是由于矿物燃料产生的二氧化碳引起的)可能引起的气候变暖的程度。”他告诫道,不能因为这个结果而放松对人类破坏环境行为的注意。这些气象学家说,从1975年到 1990年间,北半球冬季气温<特别是美国阿拉斯加、加拿大北部和俄罗斯等地)上升了0.3摄氏度。他们认为,这一气温上升有三分之一是由大气环流的自,然变动引起的。他们还认为,北半球地区从1900年到1990年近一个世纪以来的月温差约有一半也是由这种变动引起的。华莱土说,“尽管人类活动与气温的全面上升可能也有关系,但是我们认为,这种气候变化绝大部分应归因于自然变动,与温室效应引起的气候变暖无关。由于地表吸收热量的能力(热容量)比海洋低得多,地表冬季与夏季的温差非常大。因此,当大气环流带动暖气团经过北半球各大陆以及冷气团吹过海洋上空时,北半球的平均气温往往比较暖和。”他说,尽管科学家尚不完全了解引起大气环流形式变化的真正原因,但______这与自然变化有关。

第二段中华莱土说的“全球气候的不断变化”和“短期变动”指的是()。

A.全球气温自1975年以来全面上升和月温差的变化

B.北半球从1990年以来月温差的变化和1975年以来冬季变暖

C.大气环流形式的自然变动和北半球近一个世纪以来的气温变化

D.全球气象情况的自然变化和大气环流形式的自然变动

题型:单项选择题

当RESET信号为高电平时,8086/8088微处理器中寄存器的初始值为FFFFH的是 ( )。

A.CS

B.IP

C.BP

D.ES

题型:单项选择题

Michael Fish may soon be replaced as a weather forecaster by something truly fishier---the shark(鲨鱼).

Research by a British biology student suggests that sharks could be used to predict storms.

Lauren Smith, 24, is close to completing her study on shark’s ability to sense pressure.

If her studies prove the theory, scientists may be able to monitor the behaviour of sharks to predict bad weather.

Miss Smith had previously studied the behaviour of lemon sharks in the Bahamas.

She then used their close relatives, lesser spotted dogfish, for further research at Aberdeen University.

Her work---thought to be the first of its kind to test the pressure theory ---- resulted from the observation that juvenile blacktip sharks off Florida moved into deeper water ahead of a violent storm in 2001.

Miss Smith said: “I’ve always been crazy about traveling and diving and this led me to an interest in sharks.”

“I was delighted to have been able to research in the area for my degree. I know there’s so much more we need to understand ---- but it certainly opens the way to more research.”

It has been discovered that a shark senses pressure using hair cells in its balance system.

At the Bimini Shark Lab in the Bahamas, Miss Smith fixed hi-tech sensors to sharks to record pressure and temperature, while also tracking them using GPS (Global Positioning System) technology.

In Aberdeen, she was able to study the effects of tidal(潮汐的) and temperature changes on dogfish----none of which were harmed. She also used a special lab which can mimic(模拟) oceanic pressure changes caused by weather fronts.

She is due to complete her study and graduate later this year. She says she will be looking for a job which will give her the chance to enrich her experience of shark research.

小题1:The passage is most probably taken from _____.

A.a short-story collection

B.a popular science magazine

C.a research paper

D.a personal diary小题2:What do we learn from the first four paragraph of the passage?

A.Sharks may be used to predict bad weather.

B.Sharks’ behaviour can be controlled.

C.Michael Fish is not qualified for his job.

D.Lauren Smith will become a weather forecaster.小题3:Lauren Smith conducted her research by _______.

A.removing hair cells from a shark’s balance system

B.measuring the air pressure of weather fronts

C.recording sharks’ body temperature

D.monitoring sharks’ reaction to weather changes小题4:What is the passage mainly about?

A.A popular way of forecasting weather.

B.A new research effort in predicting storms.

C.Biologists’ interest in the secrets of sharks.

D.Lauren Smith’s devotion to scientific research.

题型:单项选择题

以下关于www服务系统的描述中,哪一个是错误的______。

A.www服务系统采用客户/服务器工作模式

B.www服务系统通过URL定位系统中的资源

C.www服务系统使用的传输协议为HTML

D.www服务系统中资源以页面方式存储

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