问题 问答题

材料一:进入80年代以来,长江流域几乎年年发生洪灾.1998年8月下旬,上游先后出现2次洪峰,直接经济损失达上千亿元,死亡1320人.

材料二:洞庭湖的变化图

______

(1)四处江段,水能资源最丰富的是______和______(填字母),结合我国地势分析,说明判断理由.

(2)材料二说明了什么现象?它与材料一说明的现象有什么关系?

(3)试列举几条防治长江洪水的有效措施.

答案

(1)从图中看出,A位于一、二级阶梯交界处,C位于二三级阶梯交界处,落差大,水流急,水能资源丰富.

    (2)从材料二中知道其反映的是湖泊面积缩小问题.湖泊面积缩小,对长江洪水的调蓄作用减弱,易发生洪灾.

    (3)防治长江洪水的有效措施是在长江上中游植树种草、退耕还林还草,退田还湖,在中下游加固大堤、修建分洪蓄洪工程.

故答案为:(1)A;C;A位于一、二级阶梯交界处,C位于二三级接替交界处,落差大,水流急,水能资源丰富;(2)湖泊面积缩小,对长江洪水的调蓄作用减弱;(3)在长江上中游植树种草、退耕还林还草,退田还湖,在中下游加固大堤、修建分洪蓄洪工程.

阅读理解

阅读理解。

                                           The London Eye

      Want a bird's eye-view of the city of London? Take the London Eye, The London Eye, also called the Millennium Wheel, opened in 2000 to celebrate

the new millennium. It took seven years and the skills of hundreds of people

from five countries to make the Eye.  Now the Eye has become London's No. 1 scenic spot. It is 135 meters.

      How did the London Eye get its name?Well, it has 32 glass compartments that let you "see" in every direction so you can "cast your eyes" over London.

                                           The Star of Nanchang

      The Star of Nanchang opened in 2006 and then became the world's tallest wheel. It is 160 meters. There are 60 compartments, the same number as the minute's compartments on a clock. At night when its lights are all turned on,

the wheel really looks like a huge clock !

                                             The Singapore Flyer

    Why rides the Singapore Flyer?For the same reason you go to the London   Eye-for the wonderful view. It's the third world's tallest wheel.  It is 165

meters tall, If you're a tourist in Singapore, ride the Flyer on the last day of

your trip.  From its top, you can see the wonderful places you visited and

remember the great time you had.

                                              Beijing Great Wheel

      You've climbed the Great Wall of China, and now Beijing wants you to

"fly" the Great Wheel of China. The Beijing Great Wheel stands in Chaoyang Park. It is the world's highest and largest wheel now.  It is 208meters tall.

       根据短文内容 ,判断下列 句子的正误,正确的用 "A"表示,错误的用 " B"表示 。

(     )1. People began to build the London Eye in 1993.

(     )2. Because it looked like an eye, the ~ndon Eye got its name.

(     )3. In the daytime, the wheel really looks like a huge clock!

(     )4. The Singapore Flyer is the second world's tallest wheel now.

( )5. This passage is about the four big cities.

单项选择题