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问题 单项选择题 A1型题

维生素B2缺乏时可影响（）

A.羟脯氨酸、羟赖氨酸的形成

B.辅酶I的合成

C.过氧化氢酶活性

D.谷胱甘肽还原酶活性

E.碱性磷酸酶活性

答案

参考答案：D

判断题

在EXCEL2000中，打开用户定义的样式所在的文件，才能删除样式。

A．正确

B．错误
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完形填空
完形填空。
     The Turners__1__ America.They are now__2__ Beijing.This is their first visit to China.
     They are going to stay in China __3__ three months. They want to visit some big cities and villages.
They want to learn __4__Chinese, too.
     Mr Turner is a driver.He __5__ to drive in Beijing. Mrs Turner is a school teacher. She __6__ a city
school and a village school. __7__ daughter is a middle-school student. She meets some Chinese
students.
     They __8__ a lot of pictures in China. When they are back in America, they are going to show (展示)
the pictures to their __9__. They want _10__ to know more about China.
( )1. A. is from  
( )2. A. of        
( )3. A. in        
( )4. A. some      
( )5. A. like      
( )6. A. visit    
( )7. A. His      
( )8. A. bring    
( )9. A. mother    
( )10. A. Americ an		B. are from
B. at      
B. on      
B. many    
B. likes    
B. visiting
B. Her      
B. give    
B. teacher  
B. Chinese  		C. come to            
C. on                
C. for                
C. little            
C. want              
C. is visiting        
C. Your              
C. take              
C. friends            
C. the American people		D. comes from        
D. in                
D. from              
D. no                
D. wanting            
D. are visiting      
D. Their              
D. like              
D. brother            
D. the Chinese people
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