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问题 单项选择题

卡诺循环的热效率仅与下面（）有关。

A.高温热源的温度

B.低温热源的温度

C.高温热源的温度和低温热源的温度

D.高温热源的温度和低温热源的温度及工质的性质

答案

参考答案：C

完形填空
完型填空

     If  you have ever been discouraged because of failure,please read on.For often,achieving what you
__1 __to do is not the important thing.Let me explain.
     Two brothers decided to dig a__2 __hole behind their house.As they were working,a couple of older
boys stopped by to__3 __.
     "What are you doing?"asked one of the visitors.
     "We plan to dig a hole all the way through the earth!" one of the brothers__4 __excitedly.
     The older boys began to laugh,__5 __the younger ones that digging a hole all the way through the earth was__6 __.After a long__7 __,one of the diggers picked up a jar full of spiders,worms and a wide variety of insects.He__8 __the lid and showed the wonderful contents to the scoffing (嘲笑)__9 __.
     Then he said quietly and__10__,"Even if we don't dig all the way through the earth,look what we have
found along the way!"
     Their__11__was far too ambitious,but it did__12__them to dig.And that is what a goal is for-to cause us to move in the__13__we have chosen；__14__to set us to digging!
     But not every goal will be fully__15__.Not every job will end successfully.Not every relationship will
endure.Not every hope will come to pass.Not every love will last.Not every endeavor will be completed.
Not every dream will be__16__.
     But when you__17__your aim,perhaps you can say,"Yes,__18__look at what I found along the way!
Look at the wonderful things which have come into my life because I tried to do something!"
     It is in the__19__that life is lived.And I believe it is joy in the journey,in the end,that truly__20__.

( )1. A.look forward  
( )2. A.wide        
( )3. A.watch        
( )4. A.whispered    
( )5. A.expressing  
( )6. A.unnecessary  
( )7. A.silence      
( )8. A.folded      
( )9. A.volunteers    
( )10. A.confidently  
( )11. A.idea        
( )12. A.make        
( )13. A.decision    
( )14. A.as a result  
( )15. A.achieved    
( )16. A.predicted  
( )17. A.correspond to
( )18. A.but        
( )19. A.searching  
( )20. A.regards   		B. set out      
B. deep          
B. discuss      
B. commented    
B. explaining    
B. impossible    
B. intention    
B. covered      
B. hunters      
B. curiously    
B. thought      
B. expect        
B. feeling      
B. in other words
B. absorbed      
B. grasped      
B. head for      
B. so            
B. digging      
B. proves        		C. set about    
C. large        
C. introduce    
C. lectured    
C. telling      
C. unbelievable  
C. recreation  
C. removed      
C. contributors  
C. immediately  
C. goal        
C. cause        
C. chance      
C. now and then  
C. controlled  
C.  realized    
C. live up to  
C. and          
C. arranging    
C. occurs      		D. give in      
D. shallow      
D. instruct    
D. volunteered  
D. arguing      
D. incorrect    
D. imagination  
D. deleted      
D. visitors    
D. strictly    
D. belief      
D. force        
D. direction    
D. all the way  
D. decided      
D. depended    
D. fall short of
D. or          
D. discovering  
D. matters      
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单项选择题

经右颈内静脉置入漂浮导管，进入一定深度后，监测到高尖波形，收缩压约25mmHg，舒张压约为0mmHg。此时导管顶端位置最可能在（）

A.右心房

B.右心室

C.肺动脉

D.肺小动脉

E.肺毛细血管
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