问题 单项选择题

当然,海洋所能提供给我们的并不是传统意义上的粮食——大米、小麦和玉米等,而是广义的粮食——其他的能够满足人类营养需要的食物。一些海洋学家指出:仅仅是位于近海水域自然生长的海藻,每年的生长量就已相当于目前世界小麦年产量的15倍。如果把这些藻类加工成食品,就可以为人类提供足够的蛋白质。
其实,把藻类作为食品,我们并不陌生。仅以我国沿海来说,人们比较熟悉的可食用藻类就有:褐藻类的海带、裙带菜、羊栖菜、马尾藻;红藻类的紫菜、鹧鸪菜、石花菜;绿藻类的石莼、浒苔等。它们在人工的精心养殖下,产量正在不断增加。其中仅海带一种,目前年产量就比早先的野生状态提高了2000多倍,可见增产潜力是多么巨大。在国外,人们还培育出一种藻类新品种,据说在1公顷水面上生产的这种藻类,经加工后可获得20吨蛋白质、多种维生素以及人体所需的矿物质。这相当于陆地上耕种40公顷土地生产的大豆所能提供的同类营养物。

文中画线处的“它们”是指什么

A.海带、裙带菜、羊栖菜、马尾藻

B.紫菜、鹧鸪菜、石花菜

C.石莼、浒苔

D.以上全部藻类

答案

参考答案:D

完形填空
完形填空。
    Paul received an expensive car from his brother as a Christmas present. On Christmas Eve Paul saw a dirty
and poorly-dressed boy walking   1   his shining car. "Is this your car, Paul?" he asked. 
    Paul told him how he got the car and the boy was   2  . "You mean your brother gave it to you and it didn't
cost you nothing? Boy, I wish…" he said, without   3   his sentence. Paul thought the boy wished he had a   4   
like that. But what the boy said surprised Paul greatly. "I wish," the boy went on, "that I could be a brother like
that." 
    Paul looked at the boy in surprise. He invited him to take a   5   in his car and the boy agreed happily. After a
short ride, the boy turned and with his eyes   6   said, "Paul, would you mind driving in front of my house?" 
    Paul smiled a little. He thought the boy wanted to   7   his neighbors that he could ride home in a big car. But
Paul was wrong   8  . The boy ran back into his house, and after a short while came back with his disabled
brother in his arms.
    He   9   him down on the step and pointed to the car. "There she is, Buddy, just like what I told you upstairs.
His brother gave it to him for Christmas and it didn't  10   him a cent. Some day I'm going to give you one just
like it."
( ) 1. A. inside     
( ) 2. A. interested 
( ) 3. A. finishing  
( ) 4. A. car        
( ) 5. A. seat       
( ) 6. A. watering     
( ) 7. A. frustrate  
( ) 8. A. either     
( ) 9. A. sat        
( ) 10. A. pay        
B. around         
B. excited        
B. understanding  
B. brother        
B. rest           
B. shining              
B. shock          
B. too            
B. dropped        
B. cost         
C. through     
C. satisfied   
C. hearing     
C. sister      
C. ride        
C. wondering         
C. remind      
C. again       
C. let         
C. bring     
D. across      
D. surprised   
D. checking    
D. family      
D. picture     
D. shaking             
D. show        
D. instead     
D. kept      
D. return    
选择题