问题 问答题 简答题

为什么说城市生态学研究对象是城市生态系统,你对此有何看法?

答案

参考答案:

因为从生态学的角度看,城市是一种生态系统,它具有一般生态系统的最基本特征,即生物与环境的相互作用。在城市生态系统中有生命的部分包括人、动物、植物和微生物,无生命的环境部分则是各种物理的、化学的环境条件,在它们之间进行着物质代谢、信息传递和能量流动。

把城市系统说成是城市生态学的研究对象,又由于它包含的范围太广,没有表达出城市生态学研究的核心和重点,也并不妥当。

单项选择题
阅读理解

任务型阅读。

        A poor farmer had a friend who was famous for the wonderful apple tree he grew.     

        One day, his friend gave the farmer a young apple tree and told him to plant it. The farmer was

pleased with the gift, but he did not know where to plant it.    

         He was afraid that if he planted the tree near the road, strangers would steal the fruit. If he planted

the tree in one of his fields, his neighbors would come at night and steal some of the apples. If he planted

the tree near his house, his children would take the fruit. Finally he planted the tree in his wood. But

without sunlight and good soil (土壤),the tree soon died.    

         Later the friend asked the farmer why he had planted the tree in such a poor place. "What's the

difference? " the farmer said angrily and then told what he had thought.    

        "Yes," said the friend, "but at least someone could have enjoyed the fruit. Now you not only have

robbed everyone of the fruit, but also you have destroyed (毁掉) a good apple tree !"    

1. What gift did the farmer get from his friend one day?     

    ______________________________________________________________

2. How many people are there in the story?  

    ______________________________________________________________

3. Where did the farmer plant the apple tree at last?    

    ______________________________________________________________

4. Why did the apple tree soon die? 

    ______________________________________________________________

5. Who destroyed the apple tree?

    ______________________________________________________________