颅部和面部的容量在出生时的比例为() A.8:1 B.6:1 C.4:1 D.2:1

题型:单项选择题

问题:

颅部和面部的容量在出生时的比例为()

A.8:1

B.6:1

C.4:1

D.2:1

E.1:1

考点:广西口腔住院医师规范化培训口腔正畸学口腔正畸学题库
题型:单项选择题

关于 * * 损伤正确的是

A.对于危重病员即使有合并伤存在也要力争作 * * 修补并祛除血肿

B.导尿时或行会师术时应尽量放置粗号尿管,如F22或F24号

C.血肿必须清除,而尿外渗可暂不处理,几日后即可吸收

D.合并直肠损伤者更易出现 * * 修补处感染

E.以上均不对

题型:单项选择题

胚胎第6周,肝脏造血发生,其造血干细胞主要来源于 ()

A.肝

B.脾

C.淋巴结

D.骨髓

E.卵黄囊血岛

题型:单项选择题
完形填空
     When I was young, I belonged to a club that did community service work.There was one specific
event that was unusual for me.I spent three or four hours handing out warm dinner to the homeless out
in the streets.After that I went to a homeless shelter not far from the Bay Bridge.
     I was in high school and at the time my sister was too young to__1__.She wanted to help, __2__
she made four or five dozen chocolate chip cookies for me to__3__and hand out to people.When
getting to the homeless shelter__4__passed out the remaining meals.__5__, I began making sandwiches
and__6__them with the crowd.I had the containers with my__7__cookies in them and began to__8__,
offering them to anyone near me. I__9__an old gentleman and said, "Sir, would you like a cookie?" He
stopped and turned around, __10__and said, "What did you say?Did you call me sir?" I told him I
__11__, and his eyes__12__a little bit and he said, "No one has__13__called me sir." So he__14__.
It struck me.
     I explained I had been raised that__15__color and social status, everyone deserved respect.It
__16__me to think that just because he was homeless, no one__17__him the honor.It broke my heart,
and I__18__I just didn't understand__19__no one ever called him sir?I had never thought that anyone
was below me because I wasn't raised that way.Every__20__person deserves to be treated with dignity.
Years later, I still carry that memory and the lessons it taught me.Sometimes, what we take for granted
can really make a difference in someone's life.
     How have you made a difference to others?How have others made a difference to you?
( )1. A. participate               
( )2. A. however                  
( )3. A. bring                    
( )4. A. I                        
( )5. A. First                    
( )6. A. shared                   
( )7. A. classmate's             
( )8. A. walk around               
( )9. A. went                 
( )10. A. looked at
                  me rightly        
( )11. A. had                   
( )12. A. watered               
( )13. A. already               
( )14. A. was completely
                  frightened  
( )15. A. in spite of              
( )16. A. strengthened              
( )17. A. handed                      
( )18. A. had no choice 
             but to cry    
( )19. A. what                   
( )20. A. single               
B. involve                      
B. but                          
B. fetch                        
B. you                          
B. Next                          
B. gave                          
 B. schoolmate's              
B. knock around                  
B. came                          
B. stared at me
     with difficulty  
B. called                        
B. cried                        
B. ever                          
B. was not a little
     confused    
B. regardless of                
B. saddened                      
B. afforded                      
B. couldn't help
     to cry        
B. when                          
B. poor                          
C. choose                     
C. yet                        
C. collect                   
C. she                        
C. Third                     
C. helped                    
  C. sister's                
C. come around                
C. approached              
C. glared at me 
     in anger        
C. would                   
C. tore                     
C. still                   
C. was completely
    taken aback    
C. concerned about           
C. frightened                   
C. provided                    
C. had no right
     to cry          
C. whether                 
C. ordinary                
D. go                          
D. so                          
D. take                        
D. we                          
D. Finally                      
D. assisted                     
 D. family's                  
D. stand around                
D. met                          
D. looked me
right in the eye  
D. do                          
D. dropped                      
D. yet                          
D. was not a bit
    surprised      
D. for fear of                  
D. pleased                      
D. supplied                    
D. couldn't help
     but cry      
D. why                          
D. normal                     
题型:单项选择题

A机动船从B机动船右正横后22.5度方向上接近B船,并致有构成碰撞危险,下列说法何者正确?()

Ⅰ、如A船对本船是否在追越前船有任何怀疑,应假定在追越

Ⅱ、如B船对A船是否在追越本船有任何怀疑,应假定在追越

Ⅲ、如B船对A船是否正在追越本船有怀疑,应将本船作为让路船

A.Ⅰ

B.Ⅰ、Ⅱ

C.Ⅰ、Ⅲ

D.Ⅰ、Ⅱ、Ⅲ

题型:单项选择题

设有关系R、S和T如下。关系T是由关系R和S经过哪种操作得到的

R
ABC
123
416
324
S
ABC
416
271
T
ABC
123
324

A.R∪S

B.R-S

C.R×S

D.R+S

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