问题 选择题

我们经常提到的像有:①小孔成像;②平面镜成像;③放大镜成像;④电影银幕上的像;⑤汽车观后镜中的像.其中(  )

A.由于反射而形成的像是②⑤

B.由于折射而形成的像是①③

C.属于实像的是①②③

D.属于虚像的是②③④

答案

①小孔成像是由光的直线传播形成的实像.

②平面镜成像是由光的反射形成的虚像.

③放大镜成像属于凸透镜成像,是由光的折射形成的虚像.

④电影银幕上的像,属于凸透镜成像,是由光的折射形成的实像.

⑤汽车观后镜中的像,观后镜是凸面镜,所以它成的像是由光的反射形成的虚像.

综上所述,由于反射而形成的像是②⑤,由于折射而形成的像是③④,属于实像的是①④,属于虚像的是②③⑤,所以只有选项A正确.

故选A.

完形填空
完形填空。
     How do you like T-shirts? Do you know anything about them? There is a long  1  behind the first
T-shirt and today's colorful outerwear (外套).
    Many  stories talk about the first T-shirt and  2  people wear it. One says the first T-shirt had
something to do with a war.
    In World War I, some American soldiers  3  that European soldiers' undershirts were cooler and
more comfortable. They started to wear the same kind  4  the design of the undershirts was simple
and looked like the  5  T. Americans called them T-shirts.
     By World War II, all the soldiers started to wear T-shirts as underwear.
     In the 1930s, many American students started wearing white T-shirts  6  playing sport.
     In 1951, Marlon Brando (马兰.白兰度), a very famous American actor, wore a tight-fitting (紧
身的) T-shirt in a  7 . After this many American men started to dress like him.
     In the 1970s, T-shirts became the favorite kind of clothing for young people in many countries.
At that time, it was a sign of being cool and different from  8 .
     In the 1980s, T-shirts started to be  9  in China.
     Now many young people  10  their own ideas on their T-shirts: special pictures, funny words…
( )1  A. story  
( )2  A. what    
( )3  A. found  
( )4  A. but    
( )5  A. word    
( )6  A. for    
( )7  A. picture
( )8  A. another
( )9  A. hot    
( )10 A. become  
B. history  
B. how      
B. saw      
B. so      
B. letter  
B. to      
B. novel    
B. others  
B. unpopular
B. turn    
C. passage  
C. why      
C. looked  
C. and      
C. style    
C. in      
C. film    
C. other    
C. personal
C. show    
D. road        
D. when        
D. watched    
D. because                             
D. sentence    
D. about      
D. show        
D. the other  
D. traditional
D. attract    
单项选择题