问题 单项选择题

自从20世纪中叶化学工业在世界范围内成为一个产业以来,人们一直担心,它所造成的污染将会严重影响人类的健康。但统计数据表明,这半个世纪以来,化学工业发达的工业化国家的人均寿命增长率,大大高于化学工业不发达的发展中国家。因此,人们关于化学工业危害人类健康的担心是多余的。 以下哪项是上述论证必须假设的

A.20世纪中叶,发展中国家的人均寿命,低于发达国家

B.如果出现发达的化学工业,发展中国家的人均寿命增长率会因此更低

C.如果不出现发达的化学工业,发达国家的人均寿命增长率不会因此更高

D.化学工业带来的污染与它带给人类的巨大效益相比是微不足道的

答案

参考答案:C

完形填空
完形填空。
     Here are my favorite photos. __1__ the first one, you can find it's__2__ . It's hot. I'm wearing a T-shirt
  and sitting on the grass. The__3__ one is a photo of' my family.  I'm __5__ computer games. My
  grandfather is playing the erhu. My father is__5__ a newspaper. My grandmother is talking about the TV
  show __6__ my sister. And my  mother is __7__ the table.  I love this photo very much. In the third one,
  there are two __8__ . They are my friends, Tim and his brother. They are playing basketball. In the last
 one, I'm singing and my friends are dancing. __9__  I see these photos, I'm very happy.  They make me
 think of the happy __10__. I will keep the photos all my life.
( ) l. A. In          
( ) 2. A. day          
( ) 3. A. first        
( ) 4. A. going        
( ) 5. A. reading      
( ) 6. A. to          
( ) 7. A. cleaning    
( ) 8. A. girls        
( ) 9. A. When        
( ) 10. A. time        
B. At      
B. night    
B. second  
B. doing    
B. seeing  
B. with    
B. sitting  
B. boys    
B. Where    
B. age      
C. For          
C. summer        
C. third        
C. playing      
C. looking at    
C. about        
C. buying        
C. women        
C. Why          
C. hour          
D. About        
D. spring        
D. fourth        
D. reading      
D. writing      
D. on            
D. swimming      
D. men          
D. How          
D. minute        
单项选择题