问题 综合

读下图,完成下列要求。

(1)图中①地区荒漠化的自然原因是:_____________________________________________;人为原因

    是:_____________________________________________。

(2)图中①地区绿洲退化严重,对这一现象形成的原因,下列推测成立的是(多选)[ ]

    A、人口增长迅速

    B、气候变暖,蒸发量增大

    C、为争取区域内粮食自给,大力开荒种粮

    D、耕作技术落后,灌溉措施不当,出现次生盐渍化

    E、水资源污染严重

(3)图中②地区荒漠化的人为因素是什么?简要回答合理利用该处土地资源的措施。

    _________________________________________________________________________________________

    _________________________________________________________________________________________

(4)请简述防治西北地区荒漠化的具体措施。 

    _________________________________________________________________________________________

    _________________________________________________________________________________________

(5)请简述防治西北地区荒漠化,要合理利用水资源的具体措施。

    _________________________________________________________________________________________

    _________________________________________________________________________________________

    _________________________________________________________________________________________

(6)我国对西北生态建没和荒漠化防治,先后实施了“_________”防护林体系建设、_____________、

    退耕还林还草、防沙治沙等多项生态环境治理工程。

(7)__________是西北地区最为显著的自然特征,并由此形成了以草原、__________为主的景观特色。

(8)导致土地退化的不合理的人类活动主要有哪些? 

    _________________________________________________________________________________________

答案

(1)气候干旱,风化和风蚀作用强烈;水资源的不合理利用

(2)ABCD

(3)过度放牧、过度开垦;制定合理的载畜量,防止过度放牧;退耕还林还草,植树造林;生态措施和

    工程措施相结合。(答中2点即可)

(4)①合理利用水资源;②利用生物措施和工程措施构筑防护体系;③调节农林牧用地之间的关系;④

    采取综合措施,多途径解决农牧区的能源问题;⑤控制人口增长。

(5)①在农作区主要是改善耕作和灌溉技术,推广节水农业,避免土壤的盐碱化;②在牧区草原,减少

    水井的数量,以免牲畜的大量无序增长;③在干旱的内陆地区要合理分配河流上、中、下游水资源,

    既考虑上、中游的开发,又要顾及下游生态环境的保护。

(6)三北;天然林保护

(7)干旱;荒漠

(8)过度樵采、过度放牧、过度开垦;不合理利用水资源等。

阅读理解

阅读理解。

     Basketball is still a young game.  It is over ahundred years old. In the year of 1891,a certaincollege was having some trouble with its boystudents. The weather was cold and the studentshad to stay indoors. As they could not take part intheir usual outdoor sports, they were unhappy, andsome of them even got into fights from time to time.Finally, some of the teachers at the college askedDr. J. E. Naismith to invent a game so that thestudents might have something to play with. It wasnot easy to invent a game because it had to beplayed indoors, and the court was not very large.Dr. Naismith thought for a few days and invented akind of ball game.  It was a fast, exciting game withmuch moving and passing of the ball.  It was playedbetween two teams. In order to make a score, theball had to be thrown into a basket ten feet abovethe floor on the wall.  At each end of the court therewas a basket.  At first, Dr. Naismith had planned tohave the ball thrown into a box.  As he couldn't findboxes of the right size, he had to use fruit basketsinstead. That is how the game got its name-basketball.

1. The passage tells us______.

A. what basketball was

B. how basketball was invented

C. why people like basketball

D. where we can play basketball

2. Basketball is______.

A. an old game

B.a game with a long history

C. already over a hundred years old

D. invented by a student

3.The word "indoors" means ______.

A. in the door

B. inside the room

C. in many doors

D. on the door

4. Basketball was invented______.

A.in the winter of 1891

B.in September of 1981

C.in the spring of 1891

D.in the winter of 1981

5. The game got its name from______.

A.the ball itself

B. the basket itself

C. both the basket and the ball

D. the inventor

单项选择题