断路器的操作机构一般包括合闸机构和分闸机构。()

题型:判断题

问题:

断路器的操作机构一般包括合闸机构和分闸机构。()

考点:电建公司专业技能考试电气设备安装工(初级)电气设备安装工(初级)题库
题型:判断题

一张木床长约20 分米。[ ]

题型:判断题
完形填空。
     Football is, I do think, the most favorite game in England: one has only to go to one of the important
 1  to see this. Rich and poor, young and old, one can see them all there  2   for one side or the  3  .
     To a stranger (陌生人), one of the most surprising things about football in  4  is the great knowledge
of the game which   5   the smallest boy seems to have. He can tell you the names of the  6  in most
of the important team, he has  7  of them and knows the results of large numbers of matches. He will
tell you who he  8  will win such and such a match, and his ideas about   9  are usually as good as those
of men three or four times his  10 .
( )1. A. cities  
( )2. A. waiting
( )3. A. other  
( )4. A. China  
( )5. A. all    
( )6. A. players
( )7. A. names  
( )8. A. says    
( )9. A. England
( )10. A. ideas  
B. matches  
B. looking  
B. same    
B. the USA  
B. hardly  
B. cities  
B. pictures
B. asks    
B. players  
B. age      
C. teams    
C. asking  
C. tea m    
C. England  
C. only    
C. countries
C. heard    
C. decides  
C. football
C. stories  
D. places      
D. shouting    
D. players    
D. Canada      
D. even        
D. matches    
D. thought    
D. hopes      
D. men        
D. education  

题型:判断题

一个线圈的电阻为R,感抗为X2,则端电压V=I(R+X2)。()

题型:判断题

如果GDP一定时期以来呈负增长,当负增长速度逐渐减缓并呈现向正增长转变的趋势时,表明恶化的经济环境逐步得到改善,证券市场走势也将由下跌转为上升。( )

A.

A.正确

B.

B.错误

C.

C.放弃

题型:判断题

已知α1,α2,α3是3维向量空间V的一组基,设β11,β223,β3=aα123

问a取何值时,β1,β2,β3也是V的基;

更多题库