问题 探究题

蚯蚓的生活环境是什么?实验材料:滴管,水,手表,纸巾,小纸板,解剖盘,蚯蚓两条。

(1) 提出问题:蚯蚓喜欢生活在潮湿的环境,还是干燥的环境中?

(2) 提出假设:___________________________。

(3) 设计实验过程:___________________________________________________________________________________________________________。

(4)得出结论:_________________________________________________________________________。

答案

(2 )蚯蚓喜欢生活在潮湿的环境。

(3)a在解剖盘的一端放一块折好的干纸巾,另一端放一块湿纸巾。B用镊子将两条蚯蚓放到盘中,使每条蚯蚓的身体一半在干纸巾上,一半在湿纸巾上。C盖上一张小纸板,5min后,去掉纸板,观察蚯蚓在干燥的纸巾上还是在潮湿的纸巾上。D重复实验步骤b和c5次。统计实验结果。

(4)如果蚯蚓多在潮湿的纸巾上,说明喜欢潮湿的环境;如果在干燥的纸巾上多,说明喜欢干燥的环境;如果在干燥和潮湿的纸巾上的次数大致相同,说明干燥和潮湿对其生活影响不大。

完形填空
完形填空。
     A famous magician (魔术师) came to our city and gave some shows. Most of his shows had
educational (有教育意义的)   1  . He taught lessons about health, history and some other things
about life through his magic shows. Both children and parents   2   his shows, the children mainly for
fun and the parents mainly for education.    
     My mother   3   me to watch one of his shows the day before yesterday. The show taught children
not to steal (偷) by describing   4   a person might feel when his or her thing was stolen. In the show,
there was a shark. He often stole things and never   5   the owners' feelings. Then one day he found his
own things were stolen. He was 6   and angry. From that experience, he learned how worried and
angry others would be when their things were   7  . From then on he decided to   8   stealing.
     The show was great. It made me understand why we shouldn't take what didn't   9     us. I also
learned that we shouldn't get happiness from 10   others. Later I recommended (推荐) the magic to
some of my friends, hoping they would also learn something from it.
( ) 1. A. challenges
( ) 2. A. missed    
( ) 3. A. took      
( ) 4. A. why        
( ) 5. A. gave up    
( ) 6. A. relaxed    
( ) 7. A. lost      
( ) 8. A. start      
( ) 9. A. let down  
( ) 10.A. teaching  

B. mistakes    
B. enjoyed    
B. helped      
B. how        
B. dealt with  
B. upset      
B. helpful    
B. forget      
B. borrow from
B. hurting    

C. experiences  
C. learned      
C. taught      
C. when        
C. cared about  
C. dishonest    
C. wrong        
C. stop        
C. depend on    
C. beating      

D. messages    
D. remembered  
D. caused      
D. what        
D. laughed a t  
D. energetic    
D. broken      
D. keep        
D. belong to    
D. refusing    

选择题