试用风沙物理学知识阐述你对植物治沙原理的认识。

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问题:

试用风沙物理学知识阐述你对植物治沙原理的认识。

考点:荒漠化防治工程学荒漠化防治工程学题库
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常用的牙种植体种类为

A.骨内种植体

B.骨膜下种植体

C.黏膜下种植体

D.牙内种植体

E.牙内骨内种植体

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完形填空
     Many years ago, a salesman opened a bag of things from Scotland and found a card at the top. It   1  , "Expect a Miracle(奇迹)." "What does that mean?" he thought, and then   2   it into his pocket.
     That night he showed it to his wife. "Look at this, dear. What do you think it means?"
     "Maybe this is what we need," she said. "Our   3   are so great that they are too much for us. If we
start   4   great things instead of the worst, miracle may   5   ." They decided to try changing their thinking
for a few days, starting with their   6   problems. Then something changed. Not only did they find their
problems   7   be worked out, but they also started   8   a lot of money.
     To make miracles happen, you have to start by expecting them. That way your   9   can become
focused in positive ways. There are   10   coincidences, and all kinds of happy experiences   11   one
after another.
     One becomes hopeful and optimistic. Little problems began   12   , while the big ones become much
easier to work out. Success is not    13   you thought it was.
     A positive thinker first sets clear and proper goals. Then he goes to work, and   14  working. He
never gives up. His dreams are sure to come true, and   15   they do, a miracle happens. 
     Miracles come in all   16   : big, medium-sized, and small. Start expecting the small ones, and work
your way   17   to the big. Think positively,   18   yourself and work hard. You'll find yourself   19   by
how meaningful and   20   your life has become.
( )1. A. wrote   
( )2. A. set       
( )3. A. problems
( )4. A. imagining   
( )5. A. take in    
( )6. A. smallest  
( )7. A. would      
( )8. A. making     
( )9. A. suggestion  
( )10. A. harmful
( )11. A. live  
( )12. A. losing
( )13. A. as soon as
( )14. A. keeps on
( )15. A. since  
( )16. A. shapes
( )17. A. up  
( )18. A. think of
( )19. A. bored  
( )20. A. dull  
B. read      
B. sent    
B. questions   
B. hoping      
B. take up  
B. biggest     
B. could       
B. taking    
B. money        
B. strange   
B. stop    
B. disappearing
B. as long as
B. keeps up  
B. before  
B. types  
B. out    
B. take care of
B. surprised
B. careful
C. told     
C. spent     
C. suggestions
C. wishing      
C. take place
C. difficult    
C . must     
C. finding  
C. ability      
C. useful
C. work  
C. growing
C. as far as
C. keeps out
C. until
C. sizes
C. off  
C. speak out
C. upset
C. lively
D. expressed      
D. put            
D. advice        
D. expecting      
D. take over      
D. easy          
D. might          
D. doing          
D. trust          
D. embarrassing  
D. follow        
D. displaying    
D. as well as    
D. keeps from    
D. when          
D. kinds          
D. for            
D. believe in    
D. puzzled        
D. unloving      
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医疗机构制剂可以在指定的医疗机构之间调剂使用的条件是

A.发生灾情、突发事件时
B.发生灾情、疫情、突发事件或者临床急需而市场没有供应时并经相关部门批准
C.经相关部门批准后
D.临床急需而市场没有供应时
E.疫情发生并经相关部门批准

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世界上第一辆三轮机动车是法国工程师卡尔。苯茨于1885年制造的,它采用两冲程0.8匹马力的单缸汽油发动机。

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