题目内容

【题目】读世界某区域图(图甲)和该区域内A、B、C三城市气候统计图(图乙),回答下列问题。

(1)顿河因其河水流动的声音很轻,比较安静,所以在世界上享有“静静的顿河”美誉,试分析其原因。

(2)分析里海水域渔业资源逐年减少的原因。

(3)评价伏尔加河发展内河航运的条件。

【答案】(1)顿河流经地区为平原地形,地势起伏小,河流流速缓慢;顿河流经地区降水较少,且全年降水较为均匀,水量较少且稳定。

(2)石油资源开发等造成的水质污染;内流湖,入湖盐分的增加和湖水蒸发,湖水盐度升高;过度捕捞。

(3)优势条件:位于农业区,货物运输量大;水运运费低;该地区河网密集,运量大。

限制条件:冰封期长;径流季节变化大。

【解析】考查区域自然环境特征及成因,区域生态环境问题及原因,河流航运条件评价

(1)读图,根据等高线判断,顿河流经地区为平原地形,地势起伏小,河流落差小,流速缓慢。顿河流经地区距大西洋较远,到达的海洋水汽较少。根据图乙判断,降水较少,且全年降水较为均匀,河流水量较少且稳定,没有特别大的汛期,所以河水流动的声音很轻,比较安静。

(2)自然原因是气候干旱,入湖水量减少,蒸发量增大,导致湖水盐度升高。由于里海是内流湖,入湖盐分的增加和水分蒸发,湖水盐度升高,不适宜部分鱼类生长;人为原因主要从污染和过度捕捞两个方面分析。由于里海石油资源开发等,造成里海的水质污染;人类过度捕捞,影响鱼类的繁殖。所以渔业资源减少。

(3)伏尔加河流经农业区,货物运输量大。河流落差小,水流平稳,水运运量大,价格低廉。该地区河网密集,有许多运河相通,交通方便。不利条件是河流纬度高,冰封期长,有夏汛,径流季节变化大。

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【题目】Often people use laptops (笔记本电脑) on trains and airplanes,in airports and hotels.These laptops connect people to their workplace.In the United States today,laptops also connect students to their classrooms.

Westlake College in Virginia will start a laptop computer programme that allows students to do schoolwork anywhere they want.Within five years,each of the 1,500 students at the college will receive a laptop.The laptops are part of a $10 million computer programme at Westlake,a 110yearold college.The students with laptops will also have access to the Internet.Besides,they will be able to use email to“speak”with their teachers,their classmates,and their families.However,the most important part of the laptop programme is that students will be able to use computers without going to computer labs.They can work with it at home,in a fastfood restaurant or under the trees—anywhere at all!

Because of the many changes in computer technology,laptop use in higher education,such as colleges and universities,is workable(可行的).As laptops become more powerful,they become more similar to desktop computers.Also,the portable computers can connect students to not only the Internet,but also libraries and other resources.State higher education officials are studying how laptops can help students.State officials are also testing laptop programmes at other universities,too.

1The main purpose of the laptop programme is to give each student a laptop to ________.

A. do their school work

B. have access to the Internet

C. send emails

D. connect them to libraries

2The underlined word“speak”in the second paragraph most probably means“________”.

A. talk with speakers

B. talk with one's mouth

C. communicate

D. use the computer language

3Which of the following is TRUE about Westlake College?

A. It is an old college in America.

B. 1,500 students have laptops.

C. All students use computers.

D. Students there can do everything.

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