题目内容

【题目】阅读图文材料,完成下列要求。

太行山是中国东部地区的重要山脉和地理分界线,绵延400 余公里,大部分海拔在1200

米以上,山区有众多河流发源地或流经,使连绵的山脉中断形成“水口”。图19为太行山及其周边地区地貌分布图。

(1)说出图中山地东西两侧的主要地形区的地形特征差异。

(2)指出植树造林在改造山地西侧地形区生态环境中的主要作用。

(3)从自然地理环境整体性的角度,分析图中山地对其东侧地形区自然环境的影响。

【答案】(1)东侧:以平原为主;地势西高东低,平坦广阔。西侧:以高原为主;地势东高西低,千沟万壑。

(2)涵养水源、保持水土、调节气候、维护生态平衡等。

(3)山地阻挡了冬季风,使山地东侧冬季气温相对较高;东坡为夏季风迎风坡,增加夏季降水;山地水土流失较严重,在山麓地带形成冲积扇,提高了平原地区的土壤肥力。

【解析】考查地形特征,地形对气候的影响和植树造林对生态环境的影响。

(1)读等高线图可知,图中区域东侧等高线稀疏,等高线数值少于200m, 以平原为主地势西高东低,平坦广阔,图中区域西侧等高线数值大于1000m,以高原为主,地势东高西低,千沟万壑,中间区域等高线密集,等高线数值从200m升到1000m,为太行山区。

(2)山地西侧是黄土高原,在黄土高原植树造林,提高植被覆盖率,可以涵养水源,滞留降水,减少地表径流,保持水土,防治水土流失;植树造林可以降低风速,增加大气湿度,调节气候,维护生态平衡,减轻风、旱、涝等灾害。

(3)根据上题结论,可知图中山地为太行山,太行山冬季阻挡了西北季风,使山地东侧冬季气温相对较高,夏季时,太行山东坡为为夏季风迎风坡,多地形雨,降水增多,导致水土流失加剧,在山麓地带形成冲积扇,提高了平原地区的土壤肥力。

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【题目】Facebook users may feel socially successful in cyberspace(虚拟空间) but they are more likely to perform poorly in exams,according to a new research into the academic impact of the social networking website.

About 83% of British 16 to 24yearolds are thought to use social networking sites such as Facebook,MySpace and Bebo(视频博客),to keep in touch with friends and organize their social lives.

“Our study shows people who spend more time on Facebook spend less time studying,”said Aryn Karpinski,a researcher in the education department at Ohio State University.“Every generation has its distractions,but I think Facebook is a unique phenomenon.”

Karpinski and a colleague questioned 219 US undergraduates and graduates about their study practices and general Internet use,as well as their specific use of Facebook.

They found that 65% of Facebook users accessed their account daily(刷新个人主页),usually checking it several times to see if they had received new messages.The amount of time spent on Facebook at each login varied from just a few minutes to more than an hour.

The Ohio report shows that students who used Facebook had a“significantly”lower grade point average—the marking system used in US universities—than those who did not use the site.

“It is the equivalent of the difference between getting an A and a B,”said Karpinski,who will present her findings this week to the annual meeting of the American Educational Research Association.

Some UK students have already spotted the potential danger.Daisy Jones,21,an undergraduate in her final year at Loughborough University,realized the time she was spending on Facebook was threatening her grades—prompting her to deactivate(注销) her account.

Jones is among the few to have recognized the risks.According to Karpinski's research,79% of Facebookusing students believed the time they spent on the site had no impact on their work.

Facebook said,“There is also academic research that shows the benefits of services like Facebook.It's in the hands of students,in consultation with their parents,to decide how to spend their time. ”

1According to the passage we know that most present students like to get in touch with their friends by ________.

A. sending short messages B. chatting online

C. Facebook site D. sending emails

2The study shows that compared to ones who avoid websites,the school results of the students who use social networking sites are ________.

A. the equivalent of the difference between getting an A and a B

B. not less grades in all studies

C. more ambitious to succeed in their studies

D. just the same

3Researchers' survey aimed at students on the following EXCEPT ________.

A. their study practices

B. their general Internet use

C. their specific use of Facebook

D. their habits of living

4In your opinion,this research result will appear as ________.

A. news B. text

C. report D. essay

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