牙周脓肿的发病因素不包括（）。 A.牙周袋壁的化脓性炎症向深部发展，脓液不能排入袋内

题型：单项选择题 A1/A2型题

问题：

牙周脓肿的发病因素不包括（）。

A.牙周袋壁的化脓性炎症向深部发展，脓液不能排入袋内

B.牙周袋迂回曲折、涉及多个牙面，脓性渗出物不能顺利引流

C.洁治，刮治动作粗暴，将牙石碎片推入牙周袋深部

D.异物刺入牙间 * * ，引起化脓性炎症

E.根管治疗时髓室底或根管壁侧穿，引起化脓性炎症

考点：口腔内科主治医师口腔内科学口腔内科学题库
题型：单项选择题 A1/A2型题

根据句意，用所给动词的适当形式填空。

小题1:Peng Liyuan is the first Chinese first lady _______(invite) another country's first lady to visit China.

小题2: It would be great to have robots _______ (do) all the housework for us.

小题3: It’s said that the new film directed by Feng Xiaogang ______(film) in two months.

小题4: My brother, Jimmy graduated fromYancheng Teachers College in 2007, since then he _______ (be) a teacher in Yancheng.

小题5: The novel she devoted most of her lifetime to _____(come) out last month.
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题型：单项选择题 A1/A2型题
完形填空。
     We sometimes say the lion is "the king of the jungle" because it is stronger and    1    than the other
animals. It can run faster than    2    other animals and it canhunt the    3   . The lion is the _ 4    animalin
the land food chain. In the sea, theshark is at the top of the food chain. What is at the top of the world's
food chain? People are! We are not the biggest of fastest, but we are the    5  . We could notfight     6   
than a lion, so we invented guns. Now we can hunt the best.
     People's inventions are clever, but they can    7   , too. For example, many years ago in Inner
Mongolia,  people    8    guns to kill a lot of wild wolves.  Then thenumber of wild rabbits is becoming 
   9    because there is no wolf eating them. Thewild rabbits competed for the grass with the sheep and
cows. Much of the grasslandbecame desert because it was seriously    10    by the rabbits.
     Remember that we are a part of the food chain, so we are in danger, too! If we protect animals, we
are protecting ourselves.
( )1. A. dangerous          
( )2. A. less              
( )3, A. better            
( )4. A. high              
( )5. A. cleverest          
( )6. A. better            
( )7. A. dangerous          
( )8. A. uses              
( )9. A. smaller and smaller
( )10. A. destroyed         		B. dangerouser      
B. least            
B. bad              
B. highest          
B. cleverer        
B. good            
B. more dangerous  
B. used            
B. bigger and bigger
B. destroyed        		C. more dangerous
C. most          
C. best          
C. tallest        
C. clever        
C. bad            
C. be dangerous  
C. using          
C. big and big    
C. destroy        
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题型：单项选择题 A1/A2型题

以下关于公司财务状况分析的说法，错误的是（）。

A.公司盈利水平的高低及未来发展趋势是股东权益的基本决定因素

B.通常用公司的负债与公司资产和资本金相联系来衡量公司的财务稳健性或安全性

C.通常把未来盈利增长趋势强劲的股票称为绩优股

D.公司的各种财务指标之间存在一定的钩稽关系
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题型：单项选择题 A1/A2型题

“诗界革命”
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题型：单项选择题 A1/A2型题

限制性内切酶是一种

A．核酸特异的内切酶
B．DNA特异的内切酶
C．DNA序列特异的内切酶
D．RNA特异的内切酶
E．RNA序列特异的内切酶
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