问题 选择题

下列生物的亲缘关系最密切,共同特征最多的是(  )

A.同种的生物

B.同属的生物

C.同科的生物

D.同目的生物

答案

生物分类单位由大到小是界、门、纲、目、科、属、种.界是最大的分类单位,最基本的分类单位是种.分类单位越大,生物的相似程度越少,共同特征就越少,包含的生物种类就越多,生物的亲缘关系就越远;分类单位越小,生物的相似程度越多,共同特征就越多,包含的生物种类就越少,生物的亲缘关系就越近.如人种:黄种人、白种人、黑种人,他们相似程度多,亲缘关系就近.目、科、属、种四级分类定位中种最小.因此亲缘关系最密切,共同特征最多的是同种的生物.

故选:A.

完形填空
完形填空
     A businesswoman got into a taxi in midtown. As it was the rush hour and she was in a__1__to catch
a train,   she__2__a quick way to reach it. "I have been a taxi driver for 15 years!" the driver said__3__.
"You don't think I know the best way to go?"
     The woman tried to explain that she hadn't__4__to annoy him,   but the driver kept__5__. She finally
realized that he was too annoyed to be__6__,   so she changed her__7__. "You know,   you are right,  
" she told him. "It must seem__8__for me not to think you know the best way__9__the city."
  10   ,   the driver glanced at his   11   in the rearview mirror,   turned down the street she wanted and
got her to the train on time. "He didn't say another word the rest of the ride,   "she said. "  12   I got out
and paid him. Then he thanked me."
     When you find yourself  13  with people like the taxi driver,   you will always try to  14    your idea. It
can lead to longer arguments,   lose job chances or  15   marriages. I have discovered one simple  16 
extremely unlikely method that can prevent the disagreement or other difficult situations from 17   in a
disaster.
     The  18   is to put yourself in the other person's shoes and look for the  19   in what that person is
saying. Find a way to  20  , and the result may surprise you.
( )1. A. hurry        
( )2. A. chose        
( )3. A. jokingly    
( )4. A. supposed    
( )5. A. apologizing  
( )6. A. reasonable  
( )7. A. road        
( )8. A. strange      
( )9. A. across      
( )10. A. Surprised  
( )11. A. rider      
( )12. A. until      
( )13. A. satisfied  
( )14. A. give up    
( )15. A. combine    
( )16. A. and        
( )17. A. lying      
( )18. A. problem    
( )19. A. fact        
( )20. A. agree      
B. rush        
B. made        
B. angrily    
B. expected    
B. driving    
B. thoughtful  
B. mind        
B. wrong      
B. at          
B. Worried    
B. speaker    
B. after      
B. concerned  
B. turn down  
B. destroy    
B. that        
B. resulting  
B. importance  
B. meaning    
B. argue      
C. moment      
C. found      
C. anxiously  
C. meant      
C. asking      
C. normal      
C. direction  
C. terrible    
C. through    
C. Annoyed    
C. helper      
C. because    
C. crowded    
C. stick to    
C. suffer      
C. but        
C. setting    
C. key        
C. expression  
C. escape      
D. way          
D. suggested    
D. curiously    
D. decided      
D. shouting      
D. practical    
D. manner        
D. stupid        
D. along        
D. Disappointed  
D. comer        
D. since        
D. faced        
D. point out    
D. divide        
D. though        
D. leading      
D. reply        
D. truth        
D. fight        
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