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问题 选择题

Following the girl, we went into a hall, on ____ walls hung a few pictures of some famous scientists．

A．its

B．which

C．whose

D．those

答案

答案：C

考察定语从句.句意:跟着这个女孩,我们进入了一个墙上挂着几张一些著名科学家的画的大厅.a hall是下文wall的逻辑主语,故引导词用whose,选C.

完形填空
完形填空。
     The Spring Festival is one of the most important traditional festivals in China. We Chinese call it "Nian". But do you know that Nian was once the name of a monster(妖怪) ?
     A long time ago, the monster Nian   1     in the mountains. It mainly ate animals which were      2    than
itself. But in winter, the animals stayed in the holes and        3       went out. It was difficult  for Nian to find
something to eat. So it came to villages and ate a lot of people. People were so        4     of Nian that they
locked their doors before evening came during winter. One day, an  old man  came to   the village. He told people there that Nian was afraid of    5   things the color red, fire and noise. He told people to play drums and gongs, make big fires and set off fireworks to make Nian   6   .
       7   a moonless, cold night, Nian went to the village again. As soon as opened its mouth, people made
too much loud   8   and made fire. Nian was really afraid and ran away. Wherever it went, there was noise and fire. When Nian was tired and couldn't run any more, people killed it.
     After that, on  the  coldest  day  of  winter,   people beat  drums and gongs,  and  set off  fireworks to
celebrate the     9       of the monster Nian. They   10   red lanterns and have a big dinner without sleeping during the night. In the morning people greet each other happily. So now we have the Spring Festival.
( )1. A. living    
( )2. A. weak      
( )3. A. often      
( )4. A. excited    
( )5. A. two        
( )6. A. go away    
( )7. A. In        
( )8. A. voice      
( )9. A. successful
( )10.A. put up     		B. lived        
B. weaker      
B. usually      
B. tired        
B. second      
B. take away    
B. At          
B. noise        
B. success      
B. put away     		C. keeping    
C. strong    
C. seldom    
C. exciting  
C. three      
C. go out    
C. Of        
C. music      
C. die        
C. put off    		D. kept        
D. stronger    
D. ever        
D. afraid      
D. third      
D. take out    
D. On          
D. sound      
D. death      
D. put down    
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单项选择题 A1型题

关于DNA的半保留复制的叙述，错误的是（）。

A.解链酶，拓扑异构酶是DNA复制时所必需的

B.首先在引物酶作用下，以核糖核苷三磷酸为原料，合成小分子RNA作为引物

C.以亲代DNA为模板，根据碱基互补规律，以四种核糖核苷三磷酸作为原料，合成子代DNA

D.根据碱基互补规律，A与T配对，G与C配对

E.DNA新链合成的方向从5′端到3′端
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