完形填空 In the United States, I have a clos

题型:完形填空

问题:

完形填空
     In the United States, I have a close friend named Jim Forest. When I first   1   him eight years ago,
and we have a good time together. Last winter, Jim came to  2  . I usually wash the dishes after we've
finished our  3  , before sitting down and drinking tea with everyone else.  One night, Jim asked if he
might do the dishes.  I said, "  4  , but if you wash the dishes you must know the   5   to wash them."
Jim replied, "Come on, you think I don't know how to wash the dishes?"  I  6  , "There are two ways
to wash the dishes.  The first is to wash the dishes in order to have clean dishes  7  the second is to
wash the dishes to wash the dishes."  Jim was delighted and said, "I   8   the second way - to wash the
dishes to wash the dishes."  From then on, Jim knew how to wash the dishes. I   9   the "responsibility"
to him for an entire week.
     While washing dishes,     10  we think only of the cup of tea that awaits us, thus   11   to get the
dishes out of the way as if they were a(n)  12  , then we are not "washing the dishes to wash the dishes."  
What's more, we are not   13   during the time we are washing the dishes.    14  , we are completely
incapable of   15   the miracle of life while standing at the sink.  If we can't wash the dishes, the chances
are we won't be 16  to drink our tea either.  While drinking the cup of tea, we will only be thinking of
other things, barely   17 of the cup in our hands.  Thus we are sucked away into the   18   and we are
incapable of actually  19  one minute of life.
     Try to wash the dishes the next time you wash the dishes, when your mind is   20  but on the dishes.
( )1.A. met        
( )2.A. play        
( )3.A. meeting    
( )4.A. Go ahead    
( )5.A. limit      
( )6.A. complained  
( )7.A. so          
( )8.A. hate        
( )9.A. transferred  
( )10. A. because    
( )11. A. planning  
( )12. A. annoyance  
( )13. A. pleased    
( )14. A. Otherwise  
( )15. A. wondering  
( )16. A. able      
( )17. A. proud        
( )18. A. future    
( )19. A. sparing    
( )20. A. somewhere  
B. called    
B. visit      
B. travel    
B. As usual  
B. method    
B. shouted    
B. but        
B. understand
B. showed    
B. if        
B. stopping  
B. job        
B. proud      
B. In fact    
B. receiving  
B. likely    
B. aware      
B. time      
B. achieving  
B. something  
C. admired  
C. study    
C. meal      
C. No way    
C. effect    
C. whispered
C. and      
C. remember  
C. explained
C. although  
C. forgetting
C. test      
C. alive    
C. However  
C. admitting
C. sure      
C. afraid    
C. past      
C. living    
C. everythin
D. joined        
D. settle        
D. talk          
D. By chance      
D. importance    
D. answered      
D. as            
D. choose        
D. contacted      
D. before        
D. hurrying      
D. help          
D. ready          
D. Even worse    
D. realizing      
D. willing        
D. ashamed        
D. distance      
D. changing      
D. everywhere    
考点:故事类阅读
题型:完形填空

(2011年广东揭阳,21题)某实验小组对实验室中A、B、C、D四瓶无色溶液进行鉴别,它们分别是硫酸钠、稀硫酸、澄清石灰水、四种物质的一种。可供使用的实验用品有:稀盐酸、稀硫酸、碳酸钠、紫色石蕊溶液、硝酸钡溶液、硝酸银溶液、稀硝酸溶液、玻璃棒、试管、胶头滴管。请利用提供的实验用品,鉴别出四种物质,并完成实验报告:

实验实验操作实验现象实验结论
取四支试管,各取少量的A、B、C、D溶液,分别先滴加紫色石蕊试液B溶液变红色,D溶液变成蓝色。A、C溶液都呈      色。B是           

D是          

另取二支试管,各取少量的A、C溶液,分别先滴入硝酸钡溶液后再滴入稀硝酸溶液。                         

                         

                           

A是硫酸钠溶液     

C是          

【发现问题】做完实验②后,该小组在网上查阅资料的时候发现,用稀硝酸酸化的硝酸钡溶液进行检验SO42-时,亚硫酸根离子(SO32-)的存在干扰了SO42-的检验。如往亚硫酸钠(Na2SO3 )溶液滴加硝酸钡溶液后有沉淀生成,再加足量的稀硝酸酸依然有白色沉淀。

【提出问题】若某无色溶液中可能含有硫酸根离子(SO42-)与亚硫酸根离子(SO32-)中的一种或两种,该如何检验?

【查阅资料】亚硫酸钡(Ba2SO3)是无色晶体或白色粉末,微溶于水,在水中是白色沉淀。中性或碱性条件下NO3-不能和SO32-反应,但在酸性条件下,NO3-能和H+反应相遇时(HNO3)具有强氧化性,易把SO32-氧化生成SO42-。往亚硫酸钡中加入盐酸能发生类似于碳酸钡与盐酸的反应,生成有刺激性的气体。

【猜   想】该无色溶液中含有(1)SO42-  (2)SO32-  (3)        

【实验探究】请你将下列实验填写完整。

实验实验操作实验现象实验结论
取该溶液少量试管E中,加入硝酸钡溶液后再加入稀硝酸酸有白色沉淀生成不能确定猜想

    一定成立

取该溶液少量试管F中,加入加入稀盐酸,加热有刺激性气味的气体生成猜想     可能成立
在④所得的溶液中加入足量的                                猜想(3)成立
写出亚硫酸钠溶液与硝酸钡溶液发生复分解反应的化学方程式:                      

【得出结论】要鉴别一种离子的存在,必须排除其它离子的干扰,不然会得出错误的结论。

题型:完形填空
若xy<0,则化简
x2y
的结果是(  )
A.x
y
B.-x
y
C.x
-y
D.-x
-y
题型:完形填空

MZD《在延安文艺座谈会上的讲话》发表于()。

题型:完形填空

日本的四大岛中,纬度最高、与琉球群岛相距最近的分别是[ ]

A.本州岛、四国岛          

B.北海道岛、九州岛

C.九州岛、四国岛          

D.本州岛、北海道岛

题型:完形填空

管道导向支座的作用的()

A、防止管道纵向失稳

B、防止管道横向失稳

C、A+B

D、导向作用

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