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问题 选择题

关于光学器材或设备，下列说法错误的是（　　）

A．照相机、幻灯机的镜头都相当于凸透镜

B．潜望镜利用了光的反射

C．近视眼是将像成在了视网膜的后面

D．电视机的遥控器可以发射出红外线

答案

照相机、幻灯机的成像就是采用凸透镜成像的原理制成的，故选项A是正确的；

潜望镜构造是由两块平面镜，正是利用了光的反射，故选项B是正确的；

近视眼是指将像成在了视网膜的前面，故选项C是错误的；

电视机遥控器的前端有一个发光二极管，可以发出不同的红外线，来实现电视机的遥控．故选项D是正确的．

故选C．

完形填空
完形填空。

     In the USA, Mother's Day is a holiday on the    1    Sunday in May. On that day    2    give their mother
cards, presents and flowers. One of the best    3    to celebrate Mother's Day is    4    your mother a day off
(休息一天). Let her have a good rest    5    other members of the family do the housework.
      Many families begin Mother's Day    6    breakfast in bed. Usually dad and the children will let mom    7  
 more as they go into    8    and get ready for her favorite meal.    9    the food is cooked, they keep everything
nice on a plate. They don't forget    10    the bottle with only one flower on the plate. Then dad and children
carefully carry the plate to mom's bedroom.
      Many families take mom to her favorite restaurant for a meal. It is a good day to let your mom have a
rest and let her see what a wonderful family she has.

( )1. A. first     
( )2. A. father    
( )3. A. ways      
( )4. A. give      
( )5. A. after     
( )6. A. with      
( )7. A. to sleep  
( )8. A. the bedroom
( )9. A. Before    
( )10. A. put       		B. second         
B. student       
B. cards        
B. to give        
B. before        
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B. sleeping        
B. the dining room  
B. After        
B. to put       		C. third     
C. children  
C. children  
C. giving    
C. while                  
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C. slept  
C. the kitchen 
C. On        
C. putting 		D. two        
D. boys       
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D. Ago        
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单项选择题

《无声的空间》一书中认为社交空间的范围是（）

A.0～46cm

B.46～122cm

C.122～610cm

D.610cm以上
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