问题 解答题

北美的凯巴森林主要由松树、冷杉和云杉等植物构成,森林的底层还生长着多种草本植物.树上生活着快乐的小松鼠,以采集果实为生.森林中大约有4000多只黑尾鹿吃树叶或草本植物.狼以黑尾鹿为食,凶狠的美洲狮常常捕猎狼和黑尾鹿.枯枝落叶和动物残骸能被生活在土壤中的各种细菌和真菌所分解.森林中阳光普照、空气清新、土壤肥沃、水分充足、温度适宜…印第安人与各种生物在这片森林中和谐地生活着,森林里到处都呈现出一片生机勃勃的景象.

(1)仔细阅读上文,认真分析该森林生态系统的组成,填出该生态系统的组成成分(每一成分写两项以上,必须用上文中的例子).

(2)你能列出凯巴森林中的食物链吗?(三条以上)

答案

(1)生态系统包括生物部分和非生物部分,而生物部分由生产者(植物)、消费者(动物)和分解者(细菌、真菌)组成,生产者是指能进行光合作用,为植物自身、消费者、分解者提供有机物(食物)和氧气的绿色植物.植物有木本植物(各种树木)和草本植物.消费者是指不能进行光合作用,必需以现成的有机物为食的动物,分解者包括细菌和真菌.严格的说是腐生细菌和真菌.还包括腐生动物如蚯蚓和 蝇的幼虫.非生物部分包括阳光、空气、土壤、水分等.

(2)食物链是消费者和生产者之间吃与被吃的关系.不包括非生物部分和分解者.

故答案为:(1)

(2)松树→小松鼠→印地安人;草本植物→黑尾鹿→狼→美洲狮;草本植物→黑尾鹿→印地安人.

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     Mr and Mrs King have lived in our town for nearly twenty years. They have a book shop by the bus
station. They're polite to everyone and have a lot of friends. They often    1    the poor students and sell
them some books cheaply. So there're many young men in their shop. Of course people    2    them and
their friends often visit them and    4     them. We can always hear their rooms are full of    3    and quarrel.
     It was a Friday evening. Mr and Mrs King were going to have a picnic on the island the next    5    . It
was a little far from our town. So they had to    6    earlier than usual to catch a six o'clock train. After    7   
a few friends came to see them while they were cooking some food and drinks for the picnic. Mr King and
his wife had to stop to receive them. They talked a lot and few of them looked at the    8     on the wall. It
was late. Mr and Mrs King were anxious (焦急的) but they couldn't tell the visitors about it. Mrs King
thought for a few minutes and had an idea. She said to her husband, "Oh, it's eleven o' clock! You'd better
stop talking ,dear! Our guests are anxious to    9    !"
     Mr King heard this and stood up, then he said   10    to the visitors and they left soon.
( )1. A. help      
( )2. A. know        
( )3. A. play with
( )4. A. cry        
( )5. A. morning  
( )6. A. go to work  
( )7. A. breakfast  
( )8. A. phone      
( )9. A. go home    
( )10. A. hello      
B. hurt        
B. understand  
B. fight with  
B. shout        
B. afternoon    
B. get up      
B. lunch        
B. photo        
B. go to bed    
B. goodbye      
C. hit        
C. meet        
C. talk with    
C. noise        
C. evening      
C. go to sleep  
C. supper        
C. clock        
C. go shopping  
C. sorry        
D. watch            
D. like            
D. catch up with    
D. laugh            
D. night            
D. open the shop    
D. meal            
D. picture          
D. have a seat      
D. nothing          
多项选择题