问题 单项选择题 A1/A2型题

下列哪项不是铜绿假单胞菌所产生的毒素和酶()

A.铜绿假单胞菌外毒素A

B.蛋白分解酶

C.胞外酶S

D.弹性蛋白酶

E.红疹毒素

答案

参考答案:E

解析:铜绿假单胞菌主要致病物质是内毒素,此外尚有菌毛、荚膜、胞外酶和外毒素等多种致病因子,但无红疹毒素。

完形填空
完形填空。
  Daniel is an American young man. He lives on the    1    floor of a tall
building. His office is more than ten kilometers away. He must get up early 
   2    a quarter past six, and    3    home at seven. The lift takes him down. Then
he    4    to the bus stop. The stop is only two    5    metres from the building.
There he   6   No. 11 Bus. He begins     7    at eight and finishes it at five. Then
he comes back. He takes the lift up to the   8    floor. Then he     9  up the three
floors on foot, just for exercise. He cooks and eats his supper, and watches TV
until   10  . After that Daniel usually falls into bed for night.
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( )4. A. walk          
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( )7. A. to work        
( )8. A. twelve        
( )9. A. climb          
( )10. A. nine twentieth
B. fifteenth  
B. on        
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B. run        
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B. works      
B. fifteen    
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B. nine twenty
C. fiveteen      
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单项选择题 案例分析题