问题 选择题

每年十月通常秋高气爽的北京,今年深陷重重雾霾污染中。28日开始的雾霾严重污染北京并将延续到29日,能见度很低,给道路交通和市民出行带来不便。下图为城区立交在浓雾中若隐若现。回答下列各题。

小题1:浓雾天气使能见度降低的原因之一是(  )

A.浓雾吸收地面辐射,增强大气逆辐射

B.浓雾削弱了地面辐射

C.浓雾对太阳辐射有反射作用

D.浓雾改变了太阳辐射的波长小题2:深秋初冬时节也是该地大雾多发期,这其中的道理是(  )

A.昼夜温差减小,水汽易凝结,但风力微弱,水汽不易扩散

B.昼夜温差减小,水汽不易凝结,直接悬浮于大气中

C.昼夜温差较大,水汽不易凝结,直接附着在地面上

D.昼夜温差较大,水汽易凝结,且该季节晴好天气多,有利于扬尘的产生小题3:读图可以发现此时虽然为浓雾天气,能见度不是很好,但是红绿色的交通信号灯却是很醒目。运用地理原理分析大雾期间红、绿色光仍然很醒目的原因(  )

A.红、绿色光不容易被散射

B.红、绿色光最容易被散射

C.红、绿色光不容易被遮挡

D.红、绿色光不容易被吸收

答案

小题1:C

小题2:D

小题3:A

题目分析:

小题1:浓雾对太阳辐射具有反射作用,使到达地面的太阳辐射减弱,地面物体反射的太阳光减弱,使得人们看到的物体变得模糊不清了,选项C正确。

小题2:深秋初冬时节,华北地区沙尘天气居多,大气中尘埃物质多,成为水汽凝结的凝结核,晴天时,昼夜温差较大,夜晚气温低,易于水汽的凝结,形成大雾。选项D正确。

小题3:空气散射时主要对波长较短的紫色光和蓝色光散射明显,而红绿灯所发出的红色和绿色光,波长较长,不容易被散射,所以虽然有大雾天气,红绿灯依然醒目。选项A正确。

填空题
阅读理解

阅读理解。

     SINA-In order to let people go out more easily during the 2008  Olympic Games,  Beijing is  Going to

start a special bus line and seven more nihgt bus lines. 40% of the taxis will be in service for 24 hours. The subway will run longer hours, too.(December 27, 2007)

    YAHOO-An old man called Shen Yuan made five Fuwa toys with 6,000 pieces of paper. It took him a few months of to finish them. Mr. Shen will make another five bigger  Fuwa toys and send them to Beijing.

(January 7, 2008)

     BAIDU-The Olimpic Flame(圣火)  has arrived in Beijng, show that the Olympic Games  in China will

soon begin. From today, the torch(火炬)will carry the Flame across the world. (March 31, 2008)

     XINHUA-Yang Yang, a famous Chinese skater,  received the Beijing Olympic torch from a leader in

Sanya,  May 4, 2008. Yang ran the first 200 metres during the torch relay (接力) in Sanya, the first leg in

the Chinese mainland(大陆). (May 4, 2008)

1. ____ isn't mentioned in the news above.

A. The bus      

B. The    

C. The subway    

D. The plane

2.  The old man's Fuwa toys were made of ___. 

A.  glass    

B. paper    

C. cotton    

D. silk

3.  The torch has carried the Flame across the world since ___.

A.  December 27, 2007      

B. January 7, 2008

C.  March 31, 2008        

D.  May 4, 2008

4.  In the Chinese mainland, the first leg of the torch relay started in ____.

A. Beijng    

B. Chongqing    

C. Shanghai    

D. Sanya

5.  There ____ of news about the Olympic torch relay here.

A. is only one piece      

B. are two pieces    

C. are three pieces

D. are four pieces