对外部相间短路引起的变压器过电流,应装设下列保护作为后备保护,并应带时限动作于断开相

题型:多项选择题

问题:

对外部相间短路引起的变压器过电流,应装设下列保护作为后备保护,并应带时限动作于断开相应的断路器,同时应符合下列规定:()

A.过电流保护宜用于降压变压器。

B.过电流保护应用于升压变压器。

C.复合电压(负序电压和线间电压)启动的过电流保护或低电压闭锁的过电流保护,宜用于升压变压器和过电流保护不符合灵敏性要求是降压变压器。

D.复合电压(负序电压和线间电压)启动的过电流保护,宜用于降压变压器和过电流保护不符合灵敏性要求是降压变压器。

考点:用电检查员考试用电检查技师用电检查技师题库
题型:多项选择题

在舵由零位转向最大舵角时,转舵油缸中的工作油压大致上()

A.与舵角无关

B.随舵角增大而上升

C.随转舵速度而变

D.随舵角增大而降低

题型:多项选择题

会计凭证的附件应加盖()戳记。

A、会计凭证

B、附件

C、原始凭证

D、凭证

题型:多项选择题

据报道,一辆载有28t浓盐酸的罐车在环湾大道斜坡处抛锚,部分盐酸从罐体顶部泄漏出来,现场瞬间弥漫一些浓酸雾,空气中散发着淡淡的酸味…某学校的化学活动小组举行了一次事故处理研讨会.请你运用所学的化学知识参与其中.

[事故危害分析]通过阅读化学课本和查阅网络,收集到以下资料:

①盐酸有腐蚀性造成环境污染; ②盐酸的刺激性气味危害人体健康;

[事故处理方案]对于事故处理,同学们展开了热烈的讨论:

(1)小明提出用可溶性碱来处理,例如:______(填物质名称),理由是______.

(2)小红提出不同意见,她认为用小明的做法污染面积较大,不能使用酸碱指示剂的情况下无法确定_______,因为______.

(3)通过以上讨论,大家决定用盐类物质处理酸液.例如:______(填写一种具体物质)选择这种物质的优点是______.

[事故处理反思]用(3)的方法处理泄漏的酸液,如果仍不能认定处理后的土壤一定呈______ 性(选“酸”、“碱”或“中”),我们还该取处理后的土样,用______来进一步准确的确定.

题型:多项选择题
完形填空
     Most adults want to return to their childhood,   because they believe how happy it is to be a child.
But they forget that times have changed a great deal,   and they never honestly change places with a
child. Think of the years at __1__: the year spent living in __2__ fear of examinations and school reports.
Every movement you made was __3__ by some adults. Think of the __4__ when you had to go to bed
early,   you had to eat __5__ things that were supposed to be good for you. Remember how "gentle"
__6__ was given to you with words like"If you don't do what I say,   I will…". I'm sure you will __7__
forget!
     __8__,   these are only part of children's trouble. No matter how kind and loving parents may be,  
children often __9__ from some terrible and illogical fears since they can't understand the world around
them. They often have such    10   in the dark or in the dream.    11   can share their fears with other
adults while children have to face their fears  12   .
     But the most   13   part of childhood is the period when you begin to go out of it,   the period when
you go into  14  . Teenagers start to be   15    their parents and this causes them great unhappiness. There
is a complete   16   of selfconfidence during this time. Adolescents pay much attention to their appearance and the   17   they make on others. They feel shy,   awkward and clumsy(笨拙的).   18   are strong but
hearts are easily broken. Teenagers   19   moments of great happiness or black despair,   20   through
this period,   adults seem to be more unkind than ever.
( )1. A. home        
( )2. A. content    
( )3. A. observed    
( )4. A. pleasure    
( )5. A. delicious  
( )6. A. pressure    
( )7. A. ever        
( )8. A. Thus        
( )9. A. suffer      
( )10. A. views      
( )11. A. Children  
( )12. A. regularly  
( )13. A. painful    
( )14. A. adulthood  
( )15. A. in        
( )16. A. need      
( )17. A. expression
( )18. A. Bones      
( )19. A. ensure    
( )20. A. and        
B. school        
B. forgetful    
B. disturbed    
B. goods        
B. nutritious    
B. care          
B. never        
B. As a result  
B. free          
B. fears        
B. Experts      
B. alone        
B. reliable      
B. adolescence  
B. through      
B. short        
B. explanation  
B. Feelings      
B. indicate      
B. but          
C. table      
C. absurd      
C. stopped    
C. time        
C. tasty      
C. issue      
C. still      
C. Even so    
C. die        
C. regrets    
C. Adults      
C. doubtfully  
C. inspiring  
C. youth      
C. for        
C. lack        
C. possession  
C. Wills      
C. experience  
C. even        
D.  hand            
D.  constant        
D.  appreciated    
D.  fun            
D.  hateful        
D.  exploration    
D.  somewhat        
D.  Above all      
D.  differ          
D.  spirits        
D.  Teenagers      
D.  comfortably    
D.  imaginary      
D.  period          
D.  against        
D.  abundance      
D.  impression      
D.  Ideas          
D.  comfort        
D.  instead        
题型:多项选择题

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