问题 填空题

若一个身高1.6m的人站在竖直挂置的穿衣镜前0.5m处,则此人在镜中的像高是_____m,若此人远离平面镜,则像的大小将     (选填 “变大”、“变小”或“不变”)。

答案

1.6 不变

分析:物体在平面镜中成虚像,物像大小相等,像的大小跟物体的大小有关,跟物体距离平面镜的远近没有关系.我们感觉物体离平面镜远,像越小,是由人的视觉错误造成的.

解答:解:人身高1.6m,物体在平面镜中成虚像,物像大小相等,像高1.6m,当人远离平面镜,像的大小不变.

故答案为:1.6;不变

完形填空
完形填空。
      A man was exploring some caves by the seashore.In one cave he __1__a bag of hardened
clay balls.It seemed that someone had __2__some clay and     baked  the balls in the sun.They
didn't look like __3__ things,but they interested him,__4__ he took the bag out of the cave with him.
      As he walked along the beach he __5__ the clay balls one at a time out into the ocean as far as
he could.He thought __6__ about it until  he dropped one of the  balls  and it cracked open on a
rock.__7__was a beautiful,precious stone.__8__,the man  started  breaking open the  remaining
clay balls.__9__contained a similar treasure.He found thousands of dollars'worth of  jewels in the
20 or so clay balls he had __10__,and then it struck him:__11__thousands of dollars in treasure,he
could have had tens of thousands,with the 50 or 60 clay balls with their __12__treasures which were
now in the ocean.He just __13__the chance.
      Sometimes it's like that with __14__.When we look at a person,we usually only see "the outside
clay shell".It isn't always beautiful or shining,so we __15__ the person;we see him as less important
than someone more beautiful or more __16__.But we haven't taken the time to look for the __17__
inside that person.If we spend the time getting to know that person,the clay will __18__ and the brilliant
jewel will shine.We are __19__ made,not only with our physical bodies,but also with our spiritual selves,which are sometimes hidden __20__ others by the "earthen shell"
( )1.A.searched  
( )2.A.rolled  
( )3.A.dangerous  
( )4.A.while  
( )5.A.pushed  
( )6.A.little  
( )7.A.Out  
( )8.A.Moved  
( )9.A.Each  
( )10.A.given  
( )11.A.In case of  
( )12.A.hidden  
( )13.A.forgot  
( )14.A.money  
( )15.A.pity  
( )16.A.warm-hearted  
( )17.A.clay  
( )18.A.come off  
( )19.A.normally  
( )20. A.from  
B.lost        
B.pressed      
B.valuable    
B.though      
B.put          
B.long        
B.Inside      
B.Satisfied    
B.Much        
B.taken        
B.In return for
B.obvious      
B.missed      
B.life        
B.blame        
B.honest      
B.treasure    
B.break away  
B.gradually    
B.behind      
C.made  
C.dug  
C.annoying  
C.if  
C.threw  
C.hard  
C.Next  
C.Worried  
C.None  
C.left  
C.Instead of  
C.well-known  
C.abandoned  
C.people  
C.ignore  
C.famous  
C.ball  
C.run out  
C.wonderfully  
C.with  
D.found        
D.cut          
D.ordinary      
D.so            
D.pulled        
D.well          
D.Below        
D.Excited      
D.Few          
D.dropped      
D.Because of    
D.question able
D.faced        
D.friends      
D.hate          
D.stylish      
D.shell        
D.dry up        
D.expensively  
D.by           
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