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问题 单项选择题 B型题

母亲为HBsAg阳性，其新生儿亦为HBsAg阳性，最可能是经（）

A.胎盘传播

B.上行性传播

C.经食物传播

D.经水传播

E.接触传播

答案

参考答案：A

解析：病毒是由核酸和衣壳蛋白构成的简单生物，乙肝病毒的分子量很小，只有细菌的几百分之一，可通过胎盘，从母体进入胎儿体内，造成新生儿乙肝病毒感染。

单项选择题 A型题

在WS平板或HE平板上鼠伤寒沙门菌的典型菌落是（）

A.菌落中等大小边缘整齐呈黑色

B.菌落中等大小边缘整齐呈绿色

C.菌落中等大小边缘整齐呈蓝绿色

D.菌落中等大小边缘整齐较混浊中心呈黑色

E.菌落无色透明或半透明中等大小边缘整齐稍呈隆起中心带黑色
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     Last Tuesday I took my two daughters, aged five and seven, to town by car. It began to rain _1_ so
I decided I would leave the children in the _2_ before I rushed into a shop. I warned the girls not to _3_ 
anything and told them I would be back within a few_4_. Then I locked all the doors and _5_ them
happily looking out of the window.
     I returned to the car in less than five minutes but the girls had   6_! I could hardly believe my _7_. The
car doors were _8_ locked, the windows tightly shut and in the back seat _9_ only two coats. Being
_10_, I ran to the corner of the street _11   there was no sign of them. I  _12_ up to an old lady nearby
and asked _13_ she had seen two small girls but she said "No"
     Feeling quite sick with _14_, I sat on the driver's seat, and tried to stop trembling. Suddenly, I _15  a
merry laugh behind me. I got out of the car, ran round to _16_ the boot  and there inside were two very
red-faced and excited _17  . They had obviously pulled out the back seat, _18   behind it and then been
unable to push the _19   forward again. With tears in my eyes, I leaned forward and _20_ their ears.

( )1. A. heavy    
( )2. A. car      
( )3. A. ask      
( )4. A. hours    
( )5. A. had      
( )6. A. disappeared
( )7. A. ears      
( )8. A. too      
( )9. A. hanged    
( )10. A. stupid  
( )11. A. where    
( )12. A. jumped  
( )13. A. that    
( )14. A. fear    
( )15. A. felt    
( )16. A. shut    
( )17. A. child    
( )18. A. climbed  
( )19. A. window  
( )20. A. hit      		B. hard    
B. bus    
B. eat    
B. minutes
B. made    
B. died    
B. words  
B. again  
B. put    
B. proud  
B. which  
B. rushed  
B. when    
B. happiness
B. smelt  
B. repair  
B. boys    
B. flew    
B. door    
B. pulled  		C. hardly    
C. house    
C. read      
C. seconds  
C. left      
C. quarrelled
C. eyes     
C. already  
C. had      
C. frightened
C. that      
C. drove    
C. whether  
C. excitement
C. saw      
C. start    
C. women    
C. threw    
C. seat      
C. cut      		D. big        
D. school    
D. touch      
D. days      
D. let        
D. cried    
D. brains    
D. still      
D. were      
D. pleased    
D. when      
D. flew      
D. how        
D. anger      
D. heard      
D. open      
D. girls      
D. landed    
D. boot      
D. bit        
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