问题 单项选择题

在普通液压系统中,液压泵的进油口一般采用()滤油器。

A、网式

B、纸芯式

C、磁性式

答案

参考答案:A

多项选择题
完形填空
完形填空。
     Tina and Thomas Sjogren were the fourth and fifth people to reach the earth's three poles. Years ago, the
couple were   1   across the North Atlantic on their way to Europe. Tina looked out of her window and was
   2   by the vast amount of space in Greenland. "The sky outside the window burst into different   3  , and
auroras (极光) flew all around us. I   4   what it would be like to step down there and start walking   5  , all
alone in such a place." She thought, "If this is what Iceland and Greenland are like, how   6   then must the
Arctic be?" She turned to her husband,   7   him awake and said, "Honey, let's go to the Poles!"
     Tina's   8   would not be their first adventure. They had already climbed Mount Qomolangma. The pair
soon made a   9   to visit both the North and South Poles on skis, travelling  10 .
     On February 2, 2002, they reached the South Pole. Their journey  11  2 000 kilometres. After just 35 days
of recovery and preparation, they  12  again. "You are so  13  after the long expedition to the South Pole, so
you don't know if you could do  14  right away."
     On May 29, after travelling for the whole morning, as the couple watched with weak  15 , the numbers on
their GPS showed that their goal had  16  been achieved. They had made it.
     Without the  17  of dogs or supplies dropped from planes, it was only their strength and willpower that  18  
them to ski and swim their way. They got valuable experience but that did not come without a  19 . If you go
on an adventure, there's always the risk of something going wrong.  20 , you will learn from it.
( )1.A. flying         
( )2.A. frightened    
( )3.A. shapes        
( )4.A. remembered    
( )5.A. carefully   
( )6.A. cold          
( )7.A. shook       
( )8.A. idea          
( )9.A. suggestion    
( )10.A. non-stop      
( )11.A. covered       
( )12.A. broke down    
( )13.A. excited       
( )14.A. more          
( )15.A. torchlight    
( )16.A. surprisingly  
( )17.A. reward      
( )18.A. attracted     
( )19.A. price         
( )20.A. Therefore   
B. exploring   
B. bored        
B. colors      
B. wondered    
B. quickly      
B. bright       
B. knocked      
B. advice       
B. plan        
B. unsupported  
B. included     
B. settled down 
B. disappointed       
B. another     
B. sunlight    
B. luckily      
B. burden       
B. allowed      
B. success      
B. Instead     
C. swimming      
C. amazed       
C. sounds        
C. enjoyed      
C. aimlessly     
C. wonderful    
C kept          
C. order        
C. proposal      
C. unreturned   
C. lasted        
C. set out      
C. confused      
C. one          
C. breath        
C. accidentally        
C help          
C. taught       
C. mistake       
C. Otherwise    
D. sailing   
D. amused    
D. waves     
D. doubted   
D. freely    
D. terrible  
D. beat      
D. offer     
D. change    
D. unprepared           
D. crossed   
D. came back 
D. tired     
D. others    
D. eyesight  
D. eventually
D. company    
D. forced    
D. change     
D. However