问题 单项选择题

再生水是指污水经适当处理后,达到一定的水质指标,满足某种使用要求,可以进行有益使用的水。和海水淡化、跨流域调水相比,再生水具有明显的优势。从经济的角度看,再生水的成本最低,约为1~3元/吨,而海水淡化的成本约为5~7元/吨,跨流域调水的成本约为5~20元/吨。从环保的角度看,污水再生利用有助于改善生态环境,实现水生态的良性循环。
再生水也是污水处理厂处理达标水,一般为二级处理,具有不受气候影响、不与临近地区争水、就地可取、稳定可靠、保证率高等优点。再生水即所谓“中水”,是沿用了日本的叫法,通常人们把自来水叫做“上水”,把污水叫做“下水”,而再生水的水质介于上水和下水之间,故名“中水”。再生水虽不能饮用,但它可以用于一些水质要求不高的场合,如冲洗厕所、冲洗汽车、喷洒道路、绿化等。再生水工程技术可以认为是一种介于建筑物生活给水系统与排水系统之间的杂用供水技术。再生水的水质指标低于城市给水中饮用水水质指标,但高于污染水允许排入地面水体的排放标准。
再生水是城市的第二水源。城市污水再生利用是提高水资源综合利用率,减轻水体污染的有效途径之一。再生水合理回用既能减少水环境污染,又可以缓解水资源紧缺的矛盾,是贯彻可持续发展的重要措施。污水的再生利用和资源化具有可观的社会效益、环境效益和经济效益,已经成为世界各国解决水问题的必选。

再生水不可以:

A.冲洗厕所

B.冲洗汽车

C.喷洒道路

D.日常饮用

答案

参考答案:D

解析:文中捉到“再生水虽不能饮用,但它可以用于一些水质要求不高的场合”,可见再生水是不能饮用的,所以选择D。

多项选择题
完形填空
完形填空。
     A king once went to a master (大师).He wanted to become more powerful than other
__1__kings.He sat in front of the master and__2__telling him the purpose of his__3__.
The master listened__4__to the king.
     He then told the king to go to the__5    where a rose plant and a cypress (柏树) plant
were growing side by side.He told the king,"They are your__6__.They can teach you what
you want to__7__."
     The king went into the garden,and__8__the two plants but could not__9__what he
could learn from them.He went back to the master and asked,"What do you__10__,master?
I am not able to understand what and how these plants will teach me."
     The master took the king to the plants and__11__,"This cypress plant has been next to the
rose plant for so many years.Never once has it wanted to become a rose plant.__12__,the rose
plant has never wanted to become a cypress plant.If man had been the cypress plant,he would
have__13__himself with the rose and felt jealous (忌妒的) at the__14__that the beautiful rose
plant was getting from all the people.__15__,if man were the rose plant,he would have__16__
the cypress plant enviously  (羡慕地)  thinking how__17__ the plant was without the__18__
of being disturbed by people all day!Both of the plants grew very well because they__19__all
their energy for their own__20__instead of using it to compete with the other."
( )1.A.rich    
( )2.A.forgot  
( )3.A.transport
( )4.A.patiently
( )5.A.valley  
( )6.A.enemies  
( )7.A.design  
( )8.A.saw      
( )9.A.provide  
( )10. A.hear  
( )11. A.ordered  
( )12. A.Similarly
( )13. A.covered  
( )14. A.pack    
( )15. A.Besides  
( )16. A.looked at
( )17. A.heavy  
( )18. A.duty  
( )19. A.lost    
( )20. A.growth  
B.handsome  
B.continued  
B.visit      
B.angrily    
B.bank      
B.families  
B.learn      
B.watched    
B.show      
B.find      
B.explained  
B.Frequently
B.compared  
B.pay        
B.However    
B.waited for
B.useful    
B.mistake    
B.used      
B.opinion    

C.western  
C.started    
C.study    
C.happily  
C.garden    
C.friends  
C.build    
C.noticed  
C.understand
C.say      
C.asked    
C.Finally  
C.marked  
C.attention  
C.Therefore  
C.called on  
C.peaceful  
C.interest  
C.lent      
C.fun     

D.neighboring
D.suggested  
D.test        
D.worriedly  
D.forest      
D.teachers    
D.notice      
D.heard      
D.remember    
D.mean        
D.requested  
D.Luckily    
D.dressed    
D.message    
D.Or          
D.listened to
D.poor        
D.trouble    
D.received    
D.victory