问题 问答题

一天饭后,小明同学帮妈妈收拾桌上的碗筷时不小心将一杯水碰倒.他忙拿干抹布去擦,却很难将水擦干.妈妈见状拿了另一块干抹布擦,很快就将桌上的水擦干了.他感到有些奇怪.忙问妈妈是怎么回事?妈妈只是告诉他:“我拿的抹布是棉布做的,你手里的抹布是涤纶的”.他很想知道抹布的吸水能力与哪些因素有关,于是他进行了如下的实验探究.

(1)实验目的:______.

(2)所需的器材:三个形状和大小相同的烧杯,质量相同的棉布,麻布和涤纶布各一块,足够的水.

(3)主要步骤:将三个烧杯中倒入______的水,分别将三块布放入各个烧杯中让水浸透,然后将三块布分别取出.从方便和准确的角度看,应观察和比较______.将现象记入下表.

布料种类涤纶
杯中所剩水量最多较少最少
布块所含水量最少较多最多
(4)结论:______.

(5)应用:炎热的夏天,如果人体皮肤被汗浸渍,会让人觉得很不舒服.因此,从吸水多少这个角度说,应尽量采用______类的布料来制作夏装.

答案

(1)实验目的:探究抹布的吸水能力与其布料之间的关系;

(3)只有三杯水的质量相等时,才能通过杯中所剩下的水量来探究抹布的吸水能力;

(4)分析记录的数据表格可以观察到:布的吸水能力跟布料的种类有关系,棉质抹布的吸水能力最强;

(5)因为棉质抹布的吸水能力最强,因此炎热的夏天,如果人体皮肤被汗浸渍,会让人觉得很不舒服.因此,从吸水多少这个角度说,应尽量采用棉质类的布料来制作夏装.

故答案为:

(1)探究抹布的吸水能力与其布料之间的关系

(3)质量相等、杯中所剩下的水量

(4)棉质抹布的吸水能力最强    

(5)棉质

完形填空
完形填空。
    Mr Smith was an old miser (守财奴). He had a lot of   1  , but he never bought anything   2  . He and
his wife lived in an old house outside the town. He often went to the shop   3   in order to (为了) save
some money. In the   4  , as soon as it was dark in the room, he   5  . He had no TV but bought a cheap
radio and often   6   the advertisements.
    The old man had no   7  , his wife was often ill. He wouldn't send her to the hospital. He thought he
would   8   much to the doctors if they looked her over. He bought a few medical books and bought some
medicine (药)   9   her.
    One night, Mrs Smith felt unwell, she had got a bad headache. She asked her husband to  10  a doctor,
but he didn't agree (同意). He brought out some pills and made her  11  them. But it was no use.
    The old woman began to  12  at home. He locked the door and went in another room and  13  there.
The next morning, when he woke up, he came into her   14  to see if she was all right. But he found the
poor woman had died. He hurried to the telephone, but  15  his mind at once. He ran out and shouted to
servant (佣人), "Don't cook breakfast for Mrs Smith this morning, Linda!"
( )1. A. books      
( )2. A. bad         
( )3. A. on foot    
( )4. A. day         
( )5. A. went to bed 
( )6. A. listened to 
( )7. A. brothers    
( )8. A. pass        
( )9. A. to         
( )10. A. look for   
( )11. A. take       
( )12. A. laugh      
( )13. A. slept       
( )14. A. workplace   
( )15. A. kept        
B. money              
B. good               
B. by bus             
B. morning            
B. went to the cinema  
B. watched            
B. sisters             
B. tell               
B. in                  
B. take care of        
B. drink               
B. sing               
B. played              
B. bedroom            
B. finished            
C. clothes        
C. expensive     
C. by taxi        
C. afternoon     
C. read newspaper 
C. mended         
C. uncles        
C. pay            
C. for            
C. catch up with    
C. to take        
C. cry            
C. worked         
C. library       
C. changed        
D. shoes                 
D. cheap                 
D. by motorbike           
D. evening               
D. went to dance         
D. looked at             
D. children              
D. sell                  
D. from                  
D. send for (派人去请)       
D. to drink              
D. dance                 
D. drank                 
D. kitchen               
D. forgot                
单项选择题