对于在弹性范围内受力的拉(压)杆,以下说法中,()是正确的。 A.长度相同、受力相同

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问题:

对于在弹性范围内受力的拉(压)杆,以下说法中,()是正确的。

A.长度相同、受力相同的杆件,抗拉(压)刚度越大,轴向变形越小

B.材料相同的杆件,正应力越大,轴向正应变也越大

C.杆件受力相同,横截面面积相同但形状不同,其横截面上轴力相等

D.正应力是由于杆件所受外力引起的,故只要所受外力相同,正应力也相同

E.质地相同的杆件,应力越大,应变也越大

考点:施工员施工员基础知识综合练习施工员基础知识综合练习题库
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深圳是我国第一个为信用立法的城市。国家商务部决定用五年时间打造中国最大的企业信用信息数据库。对深圳市和商务部的做法,认识正确的是[ ]

A、对经济活动实施宏观调控

B、在干预市场经济的正常运行

C、没有必要的

D、计划经济条件下措施的延伸和继续

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什么叫过冷奥氏体?共析钢过冷奥氏体等温转变的产物?

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完形填空。
      Once there was an old farmer, with a horse which was almost as old as himself. He   1   one morning
with his young son   2   the horse before it died. Father and son walked,   3   the farmer did not want the
horse to be   4  . 
      They met two men on the road   5   said:"Why are you walking, farmer? You have a horse. It's   6  
 to market." The farmer knew that this was   7  , so he rode on the horse,   8   his son walked. 
      Then they met two old ladies."  9   are you doing up there, farmer? Can't you  10  how tired your boy
is?"  11  the farmer got down, and his son rode  12 .  
        13 , three old men stopped them. One said:"Why are you walking, farmer? 14 . It's too hot for an old
man like you to walk today." So the farmer got up  15  his son, and they  16 .  
        17 , a young woman passed them. "Why aren't you walking?" she asked."It isn't  18  to market. Give
your poor old horse a rest." So the farmer, and his son, got down  19 . It is a fact that you cannot please 
 20  the people all the time. 
( )1. A. set out        
( )2. A. selling        
( )3. A. so            
( )4. A. very tired    
( )5. A. which          
( )6. A. a short way    
( )7. A. real          
( )8. A. while          
( )9. A. What          
( )10. A. see            
( )11. A. Because        
( )12. A. thus          
( )13. A. First          
( )14. A. Sit down      
( )15. A. behind        
( )16. A. walked on      
( )17. A. Some time later 
( )18. A. near          
( )19. A. once again      
( )20. A. both          
B. set up    
B. buying    
B. because    
B. too tired  
B. who        
B. a long way
B. true      
B. when      
B. How        
B. watch      
B. As        
B. yet        
B. Finally    
B. Sit up    
B. after      
B. rode on    
B. A moment ago   
B. long      
B. on their own
B. each of    
C. set down       
C. to sell      
C. that            
C. quite tired    
C. as               
C. the right way  
C. truly         
C. as            
C. Why            
C. look             
C. For          
C. instead        
C. Near             
C. Get up        
C. beside          
C. moved on        
C. In no time     
C. far          
C. the other day  
C. all          
D. set            
D.  to buy       
D. when             
D. tiring        
D. where           
D. the wrong way   
D. really        
D. during           
D. When          
D. notice           
D. So             
D. either        
D. Next            
D. Get down                    
D. above           
D. drove on        
D. At once          
D. short         
D. all the same     
D. none of     
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(1).治胃痛的健胃消炎颗粒,常用于()
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(3).治胃痛的养胃舒胶囊,常用于()
(4).治胃痛的小健中颗粒,常用于()

A.脾胃虚寒型

B.饮食停滞型

C.肝胃郁热型

D.瘀血停滞型 

题型:多项选择题

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A.铁铝酸四钙

B.铝酸三钙

C.硅酸三钙

D.硅酸二钙

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