问题 单项选择题

下列物质中免疫原性最强的是()

A.核酸

B.蛋白质

C.多糖

D.半抗原

E.脂类

答案

参考答案:B

完形填空
完形填空。
     My name is Mary Smith. I am 12 years old. I have a   1 , Peter.    2 I don 't have a sister.3   love our
parents very much. Peter and  students in a school.
     I  5 computer games and I play 6 in the evening every day. I like sports, too. And I have some balls
for sports.   7     eight tennis  balls  and  ten ping-pong  balls.  I    8       ping-pong with my friends every
afternoon.  Peter doesn't like computer games or 9 .  He only likes reading( 读书).  He has many   10
aboutEnglish, math, Chinese... He reads books every evening. He is a very good student.
( )1. A. brother  
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( )4. A. is      
( )5. A. like    
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( )8. A. bring    
( )9. A. balls    
( )10.A. books    
  B. sister      
  B. Or          
  B. He          
  B. am          
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  B. book        
C. son          
C. For          
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C. know        
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C. sports      
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D. daughter    
D. But        
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