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问题 改错题

第四节 短文改错（共10小题；每小题1分，满分10分）

Li Ming, who has been working as postman for                      56. ____________

two years, always wears a suit of green uniforms.                        57. ____________

He worked with care as well as with effort. He                           58.____________

serves for the people heart and soul. Every day he                        59. ____________

gets up early to deliver newspapers or magazines.                        60. ____________

He is so careful and he has never been wrong.                       61. ____________

One day he had to send a dead letter and it happened                     62. ____________

to be raining hardly outside. But he set out immediately.                  63. ____________

He had asked nearly everybody in the district after                       64. ____________

he managed to hand letter to the right person.                            65. ___________

答案

56.as后加a   57.uniforms——uniform   58.worked—-works

59.for去掉   60.or—— and   61.and——that    62.√   63.hardly—-hard

64.after—-before    65.letter前加the

完形填空
完形填空。
     Zhang Heng is a(n)  l      boy. He was born   2    1994. Now he is    3   . He    4   movies, and he
often  goes  to see      5     . Zhang Hengcan play      6       . He often      7     it  after school.He likes
music. He wants .  8    a musician.    Zhang Heng         9   likes sports. He usuallywatches them  10  
TV.
( )1. A. China          
( )2. A. on              
( )3. A. seventeenth    
( )4. A. like            
( )5. A. they            
( )6. A. guitar          
( )7. A. plays          
( )8. A. to              
( )9. A. often          
( )10.A. on              		B. Chinese        
B. at            
B. seven          
B. don't like    
B. them          
B. guitars        
B. play          
B. to be          
B. also          
B. in             		C. English        
C. to              
C. seventh        
C. likes          
C, it's            
C. the guitar      
C. playing        
C. be              
C. can            
C. at              		D. American      
D. in            
D. seventeen    
D. doesn't like  
D. it            
D. the guitars  
D. to play      
D. is            
D. too          
D. with          
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实验题

化学兴趣小组设计的创新实验是“火龙生字”．在成果展示现场，某同学用硝酸钾的热饱和溶液先在白纸上书写“火”字，晾干后白纸上出现硝酸钾晶体（见图1）．用带火星的木条接触硝酸钾晶体，就会观察到白纸上写过字的地方燃烧并迅速蔓延，留下“火”字的黑色痕迹（见图2）．在场的同学对此产生了浓厚的兴趣，并进行了如下研究：

【提出问题】为什么附有硝酸钾的白纸更容易燃烧？

【查阅资料】硝酸钾受热易分解，生成亚硝酸钾（KNO2）和一种常见的气体单质．

【猜想与假设】对于生产的是什么气体，四位同学有如下猜测：

甲：二氧化氮； 乙：氮气； 丙：氧气； 丁：氢气；

同学丙指出不可能是二氧化氮、氢气，理由是：                 、                  。

【进行实验】四位同学设计了实验对同学丙的猜想进行了验证，他们的操作方法是：         

                            ，观察到的现象是                           ，说明同学丙的猜想正确．硝酸钾分解的化学方程式是                      。

【解释与结论】白纸上写过字的地方更容易燃烧的原因是：                              

【反思与评价】为什么要用“硝酸钾的热饱和溶液”书写文字？

已知硝酸钾在不同温度时的溶解度如下表：

你对上述问题的解释是：                                                       。
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