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问题 单项选择题

关于DNA聚合酶的叙述错误的是( )。

A．需模板DNA
B．需引物RNA
C．延伸方向为5→3
D．以NTP为原料
E．具有3→5外切酶活性

答案

参考答案：D

完形填空
阅读下列短文，从每小题所给的A、B、C、D四个选项中选出最佳选项。
     Look! This is a long street. My home is in the street. Next    1    my home is No. 6 Middle School.
There are some students playing basketball on the playground. In front    2    my home there is a bus
stop. Many people are waiting for the buses,    3    we can't see a bus now. behind my home    4    is
a big shop. There are    5    kinds of foods in it. I can    6    my favorite food there. Near the big shop
there is a park. There is a zoo next to the park. In front of the zoo there    7    two fruit shops and a
bookshop    8    is next to the bookshop? It's a swimming pool. In summer, there are many people
swimming in it.    9    the right side there is a big hospital.    10    there a library in the city center?
Yes. It's next to the hospital.
(     )1. A. under 
( )2. A. in    
( )3. A. and   
(     )4. A. here  
( )5. A. much  
( )6. A. buy   
( )7. A. are   
( )8. A. What  
( )9. A. At    
( )10. A. Is    

B. to      
B. at      
B. or      
B. there   
B. many     
B. bring   
B. has     
B. How      
B. On      
B. Are   

C. in         
C. under      
C. so          
C. it       
C. a few       
C. take        
C. is       
C. Where       
C. Next        
C. Do    		D. of       
D. of       
D. but       
D. that   
D. a little   
D. cook     
D. have   
D. Who        
D. Of       
D. Does  
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单项选择题

李某，自费学医后自行开业，因违反诊疗护理常规，致使病入死亡，追究其刑事责任的机关是

A．医疗事故鉴定委员会
B．管辖地入民政府
C．管辖地入民法院
D．工商行政部门
E．卫生行政部门
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