问题 选择题

酗酒对人体的危害是(  )

A.引起心血管系统的疾病

B.引起消化不良、腹泻、便秘

C.引起急性脂肪肝、酒精肝炎、肝硬化

D.A、B、C都正确

答案

喝酒会严重损害人的神经系统,中枢神经系统是指脑和脊髓,脑有大脑、小脑、脑干组成.大脑皮层有许多重要的神经功能区如语言中枢、视觉中枢、听觉知识、躯体感觉中枢、躯体运动中枢等.少量饮酒可以促进中枢神经兴奋,在神经系统的作用下心跳加快,出现面红耳赤现象;小脑维持躯体的平衡,使动作准确协调,过量饮酒使小脑中毒,出现走路不稳的现象;过量饮酒酒精使大脑皮层的语言中枢中毒,导致说话不清现象出现;过量饮酒酒精使大脑皮层的视觉中枢中枢中毒,出现幻觉现象;严重时酒精会使整个神经中枢中毒,导致思维混乱、失去知觉,昏睡.酒精还会危害消化系统,引起消化不良、腹泻等,酒精还通过循环系统危害其它的系统和器官,如损害肝脏、损害心脏和血管,引起心血管病,引起神经衰弱、智力减退等由此表明过量的酒精会麻痹人的脑,使行为失控.酒精麻醉了人的小脑造成动作不协调,从而影响各项操作的准确性.故酒驾容易出现交通事故,因此《道路交通安全法》提高了对酒后驾车的处罚力度.可见D正确.

故选D.

单项选择题
完形填空

完形填空。
     In tradition education , the teacher may feel that the students are not very grown up.  1 ___
teachers are older than students,  2___ teachers feel that students are  3___ and do not know
much about the  4___. The teachers feel that they  5 ___ tell the students what to do most of the
time, and that they must also  6___ the students study specific(具体的)things. In  7  ___education,
the teachers'  8___ are very different. These teachers feel that the students are  9 ___first, and students
second. They10___the students to be 11___for the things that the do, just as adults  12 ___.
     A student's idea and feelings are just as important as the  13 ___. The teacher  14 ___ the students
to decide 15 ___ they want to do, and does not make them study what they do not want  16 ___. The
teacher lets them  17___  what to study and how 18___ to study . It's very important for the  19 ___ to
show how he or she feels  20___ the students.
( )1. A. Usually      
( )2. A. and          
( )3. A. old          
( )4. A. universe    
( )5. A. can          
( )6. A. force        
( )7. A. open        
( )8. A. feelings    
( )9. A. children    
( )10. A. refuse      
( )11. A. anxious    
( )12. A. are        
( )13. A. adults      
( )14. A. allows      
( )15. A. what        
( )16. A. for        
( )17. A. write      
( )18. A. much        
( )19. A. headmaster  
( )20. A. like        
B. Indeed    
B. however    
B. young      
B. culture    
B. must      
B. ask        
B. traditional
B. interests  
B. teachers  
B. agree      
B. ready      
B. do        
B. teachers  
B. suggests  
B. that      
B. to        
B. say        
B. well      
B. teacher    
B. about      
C. Besides
C. still  
C. stupid  
C. world  
C. may    
C. order  
C. strict  
C. methods
C. adults  
C. hope    
C. will    
C. will    
C. adult's
C. refuses
C. how    
C. about  
C. decide  
C. hard    
C. parent  
C. as      
D. Actually    
D. yet        
D. clever      
D. knowledge  
D. will        
D. make        
D. high        
D. experiences
D. human beings
D. wish        
D. would      
D. would      
D. teacher's
D. forbids    
D. which      
D. of          
D. hope        
D. simple      
D. student    
D. for