问题 解答题

如图是植物细胞和动物细胞,看图回答相关题目.

(1)填写图中各字母代表的细胞结构名称:

A、______   B、______   C、______   D、______  E、______    F、______   

(2)属于植物细胞的是图______,属于动物细胞的是图______.

(3)动物、植物细胞都具有的结构是______、______、______.

(4)图中含有遗传物质的结构是[______]______;具有支持和保护作用的结构是[______]______;控制物质进出细胞的结构是[______]______;细胞中的能量转换器是[______]______.

答案

(1)由图可知:A代表细胞膜,B代表细胞核,C代表细胞质,D代表细胞壁,E代表叶绿体,F代表液泡.  

(2)植物细胞比动物细胞多细胞壁、叶绿体和液泡.

(3)动物、植物细胞都具有的结构是细胞膜、细胞核、细胞质.

(4)细胞膜除了具有保护作用以外,还能控制物质进出细胞;细胞核内有遗传物质;细胞质具有流动性,能加速细胞内、外的物质交换;细胞壁对细胞起到支持和保护作用;叶绿体是细胞中的能量转换器,是进行光合作用的场所;液泡里面有细胞液,细胞液溶解多种物质,植物细胞的气味和味道等物质都存在于细胞液中.

故答案为:(1)细胞膜;细胞核;细胞质;细胞壁;叶绿体;液泡;(2)乙;甲;(3)细胞膜;细胞核;细胞质;(4)B;细胞核;D;细胞壁;A;细胞膜;E;叶绿体.

完形填空
完形填空。
        One day when Jamie came home after school, his mother had on her "worry" face. He knew she was
thinking of     1     . "It's bad out there. Black clouds are coming from the sea, " Jamie said.
         "Yes, I'm thinking of those fishing boats at sea, " she said. At that moment,     2     went out. Jamie and
his mother were in the dark.
         "The coastline(海岸) will be in the dark, " Jamie's mother said. She got more worried. "     3     always
come in threes.I broke my best glasses this morning, and my sister has the cold."
         "Now, don' t worry, mum. They're    4     to come through this all right." But Jamie really worried about
those fishing boats himself. The fishing boats would     5     the cove(海湾) in the dark.
         Jamie took flares(火焰信号弹) and rushed into the wind. There was a cliff(峭壁) by the sea. He started
to climb. He    6     himself up hand over hand. At last he reached the top.
         He     7     three times. On the fourth try he fired off (发射) one of the flares. It rose and cut into the
black sky in bright light. Then he saw an answering flare up at sea. Jamie fired off two more. He saw another
answering flare up, then another, then another. The answering flares from the fishing boats showed they     8   
the entrance to the cove but then changed course (路线) and were      9     sailing (航行) into the cove. They
were almost home. 
         Jamie helped     10      the fishermen of the village.
( )1.A.the wind
( )2.A.Jamie  
( )3.A.Messages
( )4.A.sure   
( )5.A.lose   
( )6.A.pushed 
( )7.A.made   
( )8.A.were at 
( )9.A.now   
( )10.A.answer 
B.the clouds
B.his mother
B.Accidents 
B.lucky   
B.miss   
B.pulled  
B.tried   
B.had found 
B.then    
B.save    
C.the rain 
C.the fire 
C.Troubles  
C.safe    
C.leave   
C.carried  
C.failed   
C.had passed by 
C.once    
C.find out  
D.the weather   
D.the lights    
D.Questions     
D.ready         
D.forget        
D.climbed       
D.finished      
D.were going into
D.again         
D.look for      
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