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问题 选择题

若命题“P∨Q”与“P∧Q”中一真一假，则可能是（　　）

A．P真Q假

B．P真Q真

C．¬P真Q假

D．P假¬Q真

答案

由P∨Q”与“P∧Q”中一真一假可得，P∨Q为真，P∧Q为假

∴P，Q命题一个为真一个为假

结合选项可知A有可能

故选：A

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     How are you? It is very nice   1   you to write   2   me. From your letter I know a lot   3   your school.
Now I    4   you know something about me and my school. I am thirteen years old. I am in Class One, Grade
One. My father is a    5  . He teaches English. My mother is a doctor. She works in a    6  . I   7   early and
   8   English. Our school is big. It has 2,000 students and 200 teachers. All the teachers and students work 
  9  . Please come and have a look   10   our school if you have free time.
( )1. A. of        
( )2. A. from      
( )3. A. of      
( )4. A. let       
( )5. A. teacher 
( )6. A. school    
( )7.A. go to bed  
( )8. A. look      
( )9. A. hard      
( )10. A. at      		B. on                 
B. of               
B. for              
B. say               
B. worker           
B. hospital          
B. have lessons      
B. see            
B. hardly             
B. in           		C. for    
C. in     
C. about  
C. talk   
C. student
C. factory
C. get up 
C. watch  
C. careful
C. on      		D. to          
D. to            
D. to             
D. know        
D. doctor        
D. hotel         
D. come here    
D. read          
D. fast        
D. to          
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单项选择题

下列选项不属于教师专业化的内部标准的是（）。

A.职业实践水平

B.职业自律性

C.职业社会地位

D.教师人员素质
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