流感病毒主要传播途径是下列哪一种() A.空气飞沫 B.消化道 C.静脉注射 D.皮

题型:单项选择题 A1/A2型题

问题:

流感病毒主要传播途径是下列哪一种()

A.空气飞沫

B.消化道

C.静脉注射

D.皮肤黏膜

E.媒介昆虫

考点:临床医学检验技术(士)微生物学和微生物学检验综合练习微生物学和微生物学检验综合练习题库
题型:单项选择题 A1/A2型题

已知正项组成的等差数列{an}的前20项的和100,那么a6+a15最大值是[ ]

A.25    

B.50    

C.100    

D.不存在

题型:单项选择题 A1/A2型题
完形填空。
     The worst traveler in the world is perhaps Mr.  Scot in San Francisco.
     Once he     1      from the USA to his hometown in Italy to see someone at home.The plane made a
one-hour stop to get something at Kennedy Airport of New York.      2     he thought he had arrived
home, Mr. Scot      3     the plane. He thought he was in    4    
     Wheri nobody was there to     5     him, Mr. Scot thought maybe they were held up by heavy traffic.  
While looking for     6     address, Mr.  Scot found that the old "Rome" had changed a lot.  Many     7    
buildings were replaced(被……代替)by modern ones..  He also found that many people spoke     8     
instead of Italian and that many street signs were written in English.
     Mr.  Scot knew very little English, so he asked a policeman the way to the bus station (in Italian).  
Luckily,  the policeman was also born in Italy and answered him in     9      language.
     Aftcr twelve hours traveling round on a bus, the driver handed him over to.     10_   policeman. He
asked the policeman why the.Rome police station employed(雇佣)so many people as policemen
speaking English instead of Italian.
     Mr.  Scot didn't believe he was in New York when he was told so.
     To get him on a plane back to San Francisco, he was sent to the airport in a police car with sirens
(警报器) on.  "Look!" said Scot to himself,  "I know I'm in Italy.  That's how they drive.
( )1. A. drove      
( )2. A. If        
( )3. A. got off    
( )4. A. New York  
( )5. A. find      
( )6. A. their      
( )7. A. modern    
( )8. A. French    
( )9. A. the same  
( )10.  A. a first.
B. flew      
B. Before    
B. got on    
B. Paris    
B. visit    
B. my        
B. old      
B. Japanese  
B. a foreign
B. a sccond  
C. rode      
C. Though    
C. took off  
C. Rome      
C. watch      
C. its        
C. new        
C. English    
C. a strange  
C. a third    
D. walked      
D. As          
D. took on    
D. London      
D. meet        
D. her        
D. tall        
D. Chinese    
D. a different
D. a fourth    
题型:单项选择题 A1/A2型题

下列关于实验的叙述正确的是[ ]

A.检测蛋白质时将双缩脲试剂A液和B液充分混匀后加入到组织样液中

B.在探究温度对酶活性影响的实验中,温度和pH是自变量

C.用吡罗红和健那绿染色剂可观察DNA和RNA在细胞中的分布

D.对培养液中酵母菌计数前,将培养液振荡均匀后再吸取样液

题型:单项选择题 A1/A2型题

当高压隔离开关主触点接触不良时,会有较大的电流通过消弧角,引起两个消弧角发热甚至熔在一起。()

题型:单项选择题 A1/A2型题

根据《中华人民共和国文物保护法》的规定,下列关于在历史文物保护区内的建设项目选址及其原址重建的表述中不符合相关规定的是( )。

A.全国重点文物保护单位需要在原址重建的,由省、自治区、直辖市人民政府报国务院批准
B.不可移动文物已经全部毁坏的,应当实施遗址保护,不得在原址重建
C.全国重点文物保护单位不得拆除;需要迁移的,须由省、自治区、直辖市人民政府报国务院批准
D.无法实施原址保护,必须迁移异地保护或者拆除的,应当报县级以上人民政府批准

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