某流水线浮点加法器分为五级,若每一级所需要的时间分别是6ns、7ns、8ns、9ns

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问题:

某流水线浮点加法器分为五级,若每一级所需要的时间分别是6ns、7ns、8ns、9ns 和6ns,则此流水线的最大加速比为 () 。若每一级的时间均为7ns,则最大加速比为 () 。

若每一级的时间均为7ns,则最大加速比为()

A.4.1

B.5.0

C.5.6

D.6.2

考点:计算机软件水平考试高级系统分析师计算机水平考试高级系统分析师2004年上半年上午真题
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给定资料7~8谈到了我国小水电建设无序的问题,请结合国外经验,谈谈我国在平衡水电建设和生态保护时可以从中受到哪些启示。
要求:内容具体,表述清晰,不超过300字。

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完形填空。
     Christmas is for giving and sharing, for getting together with family and friends. But mostly it's for love.
I had not believed this until a student, who was called Mark, gave me a wonderful gift one Christmas.
     Mark was an ll-year-old orphan (孤儿) who lived with his aunt, a middle aged woman greatly annoyed (使
烦恼) with the burden (负担) of  1  for her dead sister's son.
     I had not  2  Mark especially until he began staying after class each day to help me tidy up the room. We
did this quietly, not speaking much, but enjoying the time of the day. When we did talk, Mark spoke mostly
of his  3 , who had alwaya spent much time with him before she passed away.  4  Christmas came near,
however, Mark failed to stay after school each day. I  5  him one aftemoon and asked why he no longer helped
me in the room."I was making you a  6 ," he said confidently (有信心地) in a low voice. "It's for Christmas."
With that, he left the room in a hurry. He didn't stay after school any more after that. Finally  7  the last
school day before Christmas. Mark walked slowly into the room late that aftemoon."I have a present," he said.
"I hope you like it." He held out his hand, and in it wasa tiny wooden box. "It's beautiful, Mark. What's in it?"
I asked, opening the top to look  8 . "Oh, you can't see it," he replied," and you can't touch it, or taste it or feel
it, but mother always said it makes you feel good all the time, warm on cold nights, and safe when you're  9 .
     "I looked into the  10  box. "What is it, Mark," I asked, "that will make me feel so good?" "It's  11 ," he said
softly," and mother always said it's best when you give it away." And he tumed and quietly left the room.
     So now I  12  the small box on the piano in my living room. Yes, Christmas is for joy, songs and nice gifts,
but mostly, for love.
( )1. A. asking  
( )2. A. seen    
( )3  A. mother  
( )4. A  If      
( )5. A. caught  
( )6. A. secret  
( )7. A. went    
( )8. A. up      
( )9. A  alone   
( )10. A. tiny   
( )11. A. love   
( )12. A. leave  
B. waiting 
B. known   
B. teacher 
B. As      
B. called  
B. wish    
B. returned
B. inside  
B. tired   
B. empty   
B. time    
B. place   
C. caring  
C. found   
C. aunt    
C. Because 
C. took    
C. surprise
C. came    
C. down    
C. sad     
C. strange 
C. life    
C. put     
D. looking 
D. noticed 
D. friend  
D. Though  
D. stopped                       
D. wonder  
D. passed  
D. round   
D. ill     
D. beautiful
D. hope    
D. keep    
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“变形金刚”电影,是由雪佛兰旗下的2008战略车型()领衔主演。

A、马利布

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