搜题请搜索小程序“爱下问搜题”
问题 选择题

2011年春安徽出现罕见的旱情，不少地区采用人工降雨的方式来抗旱保苗。若某次降雨后天空出现了虹，如图所示虹是由阳光射入雨滴（视为球形）后，经一次反射和再次折射而产生的色散形成的，现有白光束L由图示方向射入雨滴，a、b是经过反射和折射后的其中两条出射光线，下列说法中正确的是

[ ]

A．光线a的光子能量较小

B．光线b在雨滴中的折射率较大

C．光线b在雨滴中的传播速度较大

D．若光线a照射某金属能发生光电效应，则光线b照射该金属也一定能发生光电效应

答案

答案：C

完形填空
完形填空。
Dear Bob,
       My name is Wang Jie. I want __1__ your pen pal. I live in Beijing, __2__  . I think Canada is a
  very beautiful __3__.I'm 14 years old and my birthday is __4__  September. I can __5__ a little
  English. I have __6__  brother or sister. I like to stay __7__  my classmates. We often play __8__ 
  after school, such as football, basketball, tennis and running. My favorite __9__  at school is math. I
  don't like English. It's too _10__ . Let's be good pen pals.
                                                                                                                                              Yours ,
                                                                                                                                           Wang Jie
( )1.  A. be          
( )2.  A. Shanghai    
( )3.  A. country      
( )4.  A. on          
( )5.  A. speak      
( )6.  A. a          
( )7.  A. at          
( )8.  A. the guitar  
( )9.  A. color        
( )10.A. difficult   		B. to be      
B. Singapore  
B. city        
B. at          
B. say        
B. some        
B. up          
B. soccer      
B. subject    
B. different   		C. to do    
C. China    
C. town      
C. of        
C. talk      
C. for      
C. for      
C. sports    
C. fruit    
C. easy      		D. to have      
D. Chinese      
D. village      
D. in            
D. tell          
D. no            
D. with          
D. with          
D. teacher      
D. interesting  
查看答案
填空题

煤气
查看答案