问题 单项选择题

美国斯坦福大学生物学家在何种情况下发现了植物具有应变能力 ( )

A.在寻找启动拟南芥植物的激素时

B.在测出植物细胞体内的五种不同信息时

C.在测出五种不同mDNA产生蛋白质时

D.在测出五种不同mDNA的数量剧增时

答案

参考答案:A

完形填空
完形填空。

     Jack lived with his mother and they were very poor. One day he had to go to the market to   1   their
cow for some money. On the way, Jack met a man who gave him some magic beans(魔豆)for the 
  2  . His mother was very   3  and threw the beans out of the window. The next morning, a plant was
growing up into the sky. Jack   4   up into the clouds through the plant and saw a beautiful building. He
went   5  . Hearing a voice“Fee, Fi, Fo, Fum !”, Jack hid himself in a box. A giant(巨人) came into the
room and sat down. The giant brought out a hen (母鸡)  6   laid (下蛋) a  golden egg. After a while the
giant fell asleep. Jack jumped out of the   7  and took away the hen. But suddenly the giant woke up
and started to run   8   him. Jack climbed down the plant, and as the giant was doing that he cut   9  
down. The giant fell down on the   10  . Nobody ever saw him again. With the golden eggs, Jack and
his mother lived happily from then on.

( ) 1. A. buy    
( ) 2. A. boy    
( ) 3. A. happy  
( ) 4. A. climbed
( ) 5. A. outside
( ) 6. A. what    
( ) 7. A. box    
( ) 8. A. before  
( ) 9. A. them    
( ) 10. A. floor  

B. produce
B. cow    
B. hungry  
B. jumped  
B. inside  
B. that    
B. building
B. after  
B. him    
B. ground  

C. sell  
C. hen  
C. angry
C. looked
C. within
C. whom  
C. room  
C. into  
C. her  
C. air  

D. find  
D. egg    
D. sad    
D. flied  
D. abroad
D. it    
D. sky    
D. over  
D. it    
D. stairs

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