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问题 单项选择题

操作中发生疑问时，不准擅自更改操作票，必须向（）或工区值班员报告，待弄清楚后再进行操作。

A.工作负责人

B.工作监护人

C.值班调度员

D.工作签发人

答案

参考答案：C

完形填空
完形填空。
     If you are learning English because you're going to travelin England and wish to be   1   there,don't try
to speak English perfectly,    2    if you do so,no one will understand you. In London ninety-nine in every
hundred people speak     3    English. You may say that   4    they don't speak English well themselves,
they can    5   understand it when it is well spoken. They   6     when the speaker is English. But when the
speaker is a   7   , the better he speaks, the   8     it is to understand him.
    No foreigner can    9    stress the syllables and make the tone   10   and fallin the question and  11 
exactly as a   12     does.  13  the first thing you have to do is to speak with a strong   14    accent, and
speak broken English,that is,English without any  15  . Then every English person you  16   will at once
know you are a foreigner, and try to understand you and be ready to    17    you. He will not   18   you to
be polite and use grammatical phrases. He will be  19   by his cleverness in making out your  20   and
being able to tell what you want to know.
( )1. A. settled    
( )2. A. because    
( )3. A. American  
( )4. A. because    
( )5. A. hardly    
( )6. A. say        
( )7. A. foreigner  
( )8. A. better    
( )9. A. never      
( )10. A. right    
( )11. A. request  
( )12. A. native    
( )13. A. While    
( )14. A. London    
( )15. A. grammar  
( )16. A. know      
( )17. A. welcome  
( )18. A. expect    
( )19. A. strict    
( )20. A. way       		B. heard      
B. unless      
B. bad        
B. since      
B. really      
B. can        
B. native      
B. easier      
B. even        
B. exact      
B. answer      
B. foreigner  
B. Although    
B. British    
B. mistake    
B. see        
B. help        
B. scold      
B. surprised  
B. meaning     		C. understood
C. whatever  
C. standard  
C. when      
C. at least  
C. think      
C. Londoner  
C. harder    
C. ever      
C. raise      
C. sentence  
C. child      
C. Because    
C: foreign    
C. idiom      
C. ask for    
C. teach      
C. show      
C. pleased    
C. mistake    		D. known        
D. for          
D. no          
D. even if      
D. at most      
D. hope        
D. traveler    
D. clearer      
D. only        
D. rise        
D. phrase      
D. reporter    
D. Therefore    
D. country      
D. word        
D. speak with  
D. praise      
D. think        
D. praised      
D. country      
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问答题

如图是打秋千的示意图，最初人直立站在踏板上(A点所示)，绳与竖直方向成角，人的重心到悬点O的距离为；从A点向最低点B运动过程中，人由直立状态自然下蹲，在B点人的重心到悬点O的距离为；在最低点处，人突然由下蹲变成直立状态(人的重心到悬点O的距离恢复为)且保持该状态到最高点C.设人的质量为m，踏板和绳的质量不计，空气阻力不计.求：

小题1:人刚到最低点B还处于下蹲状态时，两根绳中的总拉力F为多大？

小题2:人到达左端最高点C时，绳与竖直方向的夹角为多大？(用反三角函数表示)
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