问题 填空题

(8分)已知A是我们家庭中常见的一种调味剂,其焰色反应呈黄色; E是引起温室效应的主要气体之一;反应①是工业上生产化合物D的反应,反应⑤是实验室鉴定化合物E的反应。根据下列反应框图填空:

(1)写出有关物质的名称或化学式:

B             ,C                ,H             

(2)写出②发生反应的化学反应方程式

                           

写出④发生反应的化学方程式,并用双线桥表示出电子转移的方向和数目                                      

答案

(8分)(1)写出有关物质的名称或化学式:

B      H2O       ,C        CaCO3      ,L     Cl2    。(每空1分)

(2)②化学反应方程式       2NaCl2H2O2NaOHH2Cl2↑   (2分)

④化学方程式 2Ca(OH)22Cl2==Ca(ClO)2CaCl22H2O  (双线桥略)(3分)

完形填空
完形填空。
     It was half past eight in the morning. The telephone bell ring (电话铃响了) and Mary went to answer it.
    "Hello,   1   that?"she asked. 
    "It's me-Peter." 
     Peter was a friend of Mary's eight-year-old brother, Johnny.
     "Oh, hello, Peter.   2   do you want?"said Mary.
     "Can I speak   3   Johnny?"
     "No,"said Mary,"you   4   speak to him now. He is busy. He is preparing   5   school. He is eating his   6   .
Grandmother is washing his face. Sister is under the table, putting his shoes   7   . Mother is getting his books
and   8   them in his schoolbag. Goodbye, I have to   9   now. I have to open the door. The school bus  10 ."
(    )1. A. who’s  
(    )2. A. How     
(    )3. A. at      
(    )4. A. can     
(    )5. A. of      
(    )6. A. breakfast
(    )7. A. in      
(    )8. A. puts    
(    )9. A. sit     
(    )10. A. comes  
B. where’s
B. Who     
B. to      
B. can’t  
B. from    
B. lunch   
B. up      
B. putting 
B. eat     
B. coming  
C. what’s 
C. Whom    
C. with    
C. must    
C. for     
C. supper  
C. on      
C. takes   
C. come    
C. is coming
D. how’s     
D. What           
D. for          
D. mustn’t     
D. about        
D. dinner      
D. by             
D. taking      
D. go             
D. to come 
单项选择题