问题 选择题

沙漠地区生物种类稀少,影响生物生活的主要环境因素是(  )

A.湿度

B.水分

C.生物的天敌

D.光

答案

环境中影响生物生活的各种因素叫环境因素,分为非生物因素和生物因素.非生物因素包括:光、温度、水、空气、土壤等.生物因素是指环境中影响某种生物个体生活的其他所生物,包括同种和不同种的生物个体.沙漠干旱缺水,而水是生物体的主要组成分,水分影响生物的生长和发育,并决定陆生生物的分布.沙漠水分严重缺乏导致沙漠地区生物种类稀少.

故选:B.

阅读理解

阅读短文,根据短文内容回答问题。

    Ethiopian children are crazy about football but few of them have f ootballs of their own. They have to play

with a paper football.   

    Like all children, they find time to play but they also have to do a lot of work. Some children have to help

their parents look after younger brothers or sisters from the age of five. Many young boys have to look after

animals and the girls have to help their mothers carry water.   

    At present only one third of small children go to primary school because there are so many children and so

few schools. The classes have to be very large. In one school I went to there were 90 children in a class!   

    Traditionally the Ethiopians do not eat many vegetables. This is very bad for children, so many schools have

their own garden where youngsters can grow their own vegetables.   

    There is no public transport, so children have to walk to school. One child I spoke to had to walk for even

six hours! Many walk for two or three hours. But the Ethiopians love going to school because they know how

important education is.   

    The Ethiopian government wants more children to go to school, and organizations like UNICEF are helping

them. Many of the children want to be doctors and they will have to work hard but they know that they are

Ethiopia's hope for the future.   

    Ethiopia  n. 埃塞俄比亚  

    UNICEF = United Nations International Children's Emergency Fund   

1. Do Ethiopian children like playing football? 

                                                                                                      

2. How many Ethiopian children can go to primary school?  

                                                                                                     

3. What is Ethiopians' bad eating habit?   

                                                                                                   

4. Who are helping Ethiopian children to get education?  

                                                                                                     

5. What can you learn about Ethiopia from the passage?

                                                                                                   

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