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问题 选择题

下列说法正确的是 [ ]

A．电离平衡常数受溶液浓度的影响

B．电离平衡常数可以表示弱电解质的相对强弱

C．电离常数大的酸溶液中c（H+）一定比电离常数小的酸中大

D．H2CO3的电离常数表达式：K=

答案

答案：B

完形填空
完形填空。
     Lucy lives in the Zhongshan Road. She_1  in the No.6 Middle School. Every day she gets up early
and goes to school early. Her home is a little far_2  her school. So she usually _3_ a bus. _4  the bus
stop there is a fruit shop. It sells different_5_. Lucy often buys_6_in it and she is good at_7_fruit. From
the bus stop she walks along the Nanjing Road. Then she takes the third turning_8_the right. Her school
is_9_ 50 metres. _10_it there is a park.
( )1.A. studies          
( )2.A. to              
( )3.A. has              
( )4.A. At              
( )5.A. kinds of fruits  
( )6.A. them            
( )7.A. selling          
( )8.A. along            
( )9.A. about            
( )10.A. At the front of 		B. leaves        
B. at            
B. takes        
B. Near to      
B. kinds of fruit
B. any          
B .buying        
B. at            
B. at            
B. In front of       		C. likes          
C. from          
C. goes          
C. Next to        
C. fruit          
C. some          
C. sells          
C. to            
C. away          
C. In the front of      		D. lives      
D. away      
D. by        
D. Next      
D. fruits    
D. it        
D. buys      
D. on        
D. on        
D. At front of               
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单项选择题

下列俗称大头鱼的是（）

A.鳕鱼

B.大黄鱼

C.鳗鱼

D.鲈鱼
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