搜题请搜索小程序“爱下问搜题”
问题 解答题

某商场销售一批衬衫，平均每天可售出20件，每件盈利40元．经调查发现，在一定范围内，衬衫的单价每降1元，商场平均每天可多售出2件．

（1）若降低3元，则每天能卖______衬衫；

（2）如果商场销售这批衬衫每天要盈利1200元，衬衫的单价应降多少元？

答案

（1）由题意得：20+3×2=26（件）．

（2）设衬衫的单价应下降x元，

由题意得：1200=（20+2x）×（40-x），

解得：x1=20，x2=10．

答：衬衫的单价应下降10元或20元．

故答案为：26件．

完形填空
完形填空。
     A passenger (乘客) told an air hostess (空姐) that he needed a cup of water to take medicine when
the plane just took off. She told him that she would bring him the   1   soon.
     Twenty minutes   2 , when the passenger's ring for service sounded, the air hostess realized it at once.
She was kept so busy that she   3   to bring him the water. Therefore, the passenger was held up (延迟)
to take his medicine. She hurried over to him with a cup of water, but he   4   it.
     In the following hours on the flight,   5   time the air hostess passed the passenger, she would ask him
with a smile   6   he needed help or not. But the passenger never   7   her words.
     When he  was going to  get off   the     8   ,   the passenger asked the  air hostess  to hand   him the
passengers' booklet (意见簿). She was very   9    . She knew that he would write down sharp words,
which might make her   10   the job.   11   with a smile she handed it to him.
     Off the plane, she   12      the booklet, and cracked a smile, for the passenger put it, "On the flight,
you asked me if I needed help for twelve times   13  . How can I refuse   14   twelve sincere smiles?"
     That's right! It was the twelve smiles of the air hostess that touched (感动) the passenger  15   and
of  course she wouldn't lose her job!
( )1. A. milk        
( )2. A. late        
( )3. A. remembered    
( )4. A. accepted      
( )5. A. some       
( )6. A. why           
( )7. A. paid attention to
( )8. A. coach        
( )9. A. happy       
( )10.A. lose          
( )11.A. And         
( )12.A. opened        
( )13.A. at all        
( )14.A. her         
( )15.A. peacefully    		B. juice    
B. later     
B. forgot  
B. took    
B. either   
B. when     
B. thought of  
B. bus     
B. cheerful  
B. loses      
B. So       
B. closed    
B. in all  
B. your    
B. comfortably 		C. coffee  
C. ago     
C. wanted
C. refused
C. another
C. whether    
C. heard of
C. train
C. sad  
C. losing
C. Then  
C. destroyed
C. of all
C. their
C. deeply   		D. wate r            
D. after            
D. learned          
D. received          
D. each              
D. how              
D. worried about    
D. plane            
D. excited          
D. lost              
D. But              
D. hid              
D. all over          
D. our              
D. slowly            
 
查看答案
单项选择题

阿托品可作为下列______患畜的特效解毒药( )。

A．黑斑病甘薯中毒

B．有机磷农药中毒

C．硝酸盐与亚硝酸盐中毒

D．食盐中毒

E．铜中毒
查看答案