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问题 单项选择题

事故致因因素安全评价方法是采用( )的方法，由事故推论最基本的危险、有害因素或由最基本的危险、有害因素推论事故的方法。

A．逻辑推理

B．数理统计

C．逻辑分析

D．数学计算

答案

参考答案：A

完形填空
完形填空。

Long long ago,there was a swan(天鹅)with golden feathers(金羽毛). She lived in a lake. A woman
lived in a small house 1 the lake with her two daughters. They were very poor. They worked hard all
yearround, 2  still, they lived a hard life and sometimes they even didn't have enough _3 to buy food.
    The swan was 4 to see that. She said to herself, "I'11 give one of my    5   to them each day , then
they can live a happy life with the money selling my feathers. "That evening , she 6   to the poor
woman's house and left a golden feather  on the table without saying 7 . From then on,the swan came
every day and gave them a feather. The woman was very happy because their life was much 8 than
before.But day after day, the woman became greedy(贪婪的). She said to her 9 ,"The swan may fly
away one day. If so , we will be poor again. We should take all 10 feathers when she comes next time. "
    "Oh no,Mom!"cried the daughters,"This will 11 the swan. She helps us a lot ! "But the mother wouldn't
listen. When the 12 came as usual, the mother caught her and took all her feathers. But suddenly, the
golden feathers 13 chicken feathers.
    Then , the golden swan said , "Poor mother , I came to 14   you, but you wanted to kill me.Now,
I am leaving and will    15    come back. Never be greedy! " With these words , the swan flew away.

( )1. A. above    
(     )2. A. and      
(     )3. A. money    
( )4. A. happy    
( )5. A. presents    
(     )6. A. flew      
(     )7. A  something  
( )8. A. duller    
(     )9. A. brothers    
(     )10. A. his      
(     )11. A. hurt    
(     )12. A. woman    
( )13. A. heard of    
(     )14. A. trouble    
(     )15. A. sometirries		B. over    
B. but    
B. time    
B. surprised
B. golden coins
B. ran    
B. everything  
B. better  
B. sisters  
B. her    
B. save    
B. daughter  
B. changed into
B. help    
B. always    		C. near  
C. so  
C. room  
C. sad  
C. feathers
C. climbed
C. nothing
C  busier
C. sons
C. their
C. protect
C. chicken
C. looked for
C. teach
C. usually 		D. under        
D. or          
D. energy      
D. scared      
D. collections  
D. walked      
D. anything    
D. harder      
D. daughters    
D. our          
D. refuse      
D. swan        
D. came from    
D. invite      
D. never        
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单项选择题

局域网是当前计算机网络研究与应用物一个热点，而符合IEEE 802.3标准的传统Ethemet应用最为广泛。它在MAC层采用方法 (8) ，物理层采用 (9) 标准。随着网络技术的发展，以及大型信息系统与多媒体技术的应用，出现了满足人们更高需要的FastEthemet、交换局域网Switching LAN与 (10) 等高速局域网产品。他们符合 (11) 标准。 (8) 方法不适应重负荷与有实时性通信要求。 (10) 采用Cell作为数据传输基本单元与Ethemet帧结构不一致，但具有高带宽，低延时，可动枋分配带宽等优点。

A．ATM

B．FASTLAN

C．WWW

D．WAN
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