问题 选择题

下列离子方程式书写正确的是(    )

A 铜与盐酸反应:Cu +2H   Cu2 + H2

B 硫酸与氯化钡溶液反应:Ba2 + SO42   BaSO4

C 金属钠与水反应:2Na +  2H   2Na + H2

D 氯化亚铁与氯水反应:Fe2+ + Cl2   Fe3+2Cl 

答案

答案:B

在金属活动顺序表中铜排在氢的后面,不能置换酸中的氢,A不正确。C中水应该用化学式不是,正确的是2Na+2H2O=2Na+2OH+H2↑。D中没有配平,正确的是2Fe2+ + Cl2   2Fe3+2Cl,所以答案是B。

完形填空
完形填空。

                                          The True Story of Treasure Island
     It was always thought that Treasure Island was the product of Robert Louis Stevenson's
imagination.__1__,recent research has found the true story of this exciting work.
     Stevenson,a Scotsman,had lived __2__ for many years.In 1881 he returned to Scotland for
a __3__.With him were his American wife Fanny and his son __4__.
     Each morning Stevenson would take them out for a long __5__ over the hills.They had been
__6__ this for several days before the weather suddenly took a turn for the worse.Kept indoors
by the heavy rain,Lloyd felt the days __7__.To keep the boy happy,Robert asked the boy to do
some __8__.
     One morning,the boy came to Robert with a beautiful map of an island.Robert __9__ that the
boy had drawn a large cross in the middle of __10__. "What's that?" he asked. "That's the __11__
treasure," said the boy.Robert suddenly __12__ something of an adventure story in the boy's __13__.
While the rain was pouring,Robert sat down by the fire to write a story.He would make the __14__
a twelve year old boy,just like Lloyd.But who would be the pirate(海盗)?
     Robert had a good friend named Henley,who walked around with the __15__ of a wooden leg.
Robert had always wanted to __16__ such a man in a story.__17__ Long John Silver,the pirate with
a wooden leg,was __18__.
     So,thanks to a __19__ September in Scotland,a friend with a wooden leg,and the imagination of
a twelveyearold boy,we have one of the greatest __20__ stories in the English language.

( )1.A.However    
( )2.A.alone      
( )3.A.meeting    
( )4.A.Lloyd      
( )5.A.talk        
( )6.A.attempting  
( )7.A.quiet      
( )8.A.cleaning    
( )9.A.doubted    
( )10.A.the sea    
( )11.A.forgotten  
( )12.A.saw        
( )13.A.book      
( )14.A.star      
( )15.A.help      
( )16.A.praise    
( )17.A.Yet        
( )18.A.read      
( )19.A.rainy      
( )20.A.news      
B.Therefore
B.next door
B.story    
B.Robert    
B.rest      
B.missing  
B.dull      
B.writing  
B.noticed  
B.the house
B.buried    
B.drew      
B.reply    
B.hero      
B.problem  
B.produce  
B.Also      
B.born      
B.sunny    
B.love      
C.Besides  
C.at home  
C.holiday  
C.Henley    
C.walk      
C.planning  
C.busy      
C.drawing  
C.decided  
C.Scotland  
C.discovered
C.made      
C.picture  
C.writer    
C.use      
C.include  
C.But      
C.hired    
C.cool      
C.real-life
D.Finally      
D.abroad      
D.job          
D.John        
D.game        
D.enjoying    
D.cold        
D.exercising  
D.recognized  
D.the island  
D.unexpected  
D.learned      
D.mind        
D.child        
D.bottom      
D.accept      
D.Thus        
D.written      
D.windy        
D.adventure    
单项选择题