练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情

    So although Fleming discovered penicillin, it was over a decade ___________someone else turned penicillin into the great drug of the 20th century


    1. A.
      when
    2. B.
      that
    3. C.
      before
    4. D.
      unless
    C
    考查时间状语从句。句意“尽管是弗莱明发现的青霉素，但是青霉素广泛用于药物是几十年后的事情。”it is +一段时间+before意为“过了多久才......”。故选C。
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中英语 来源：辽宁省期中题 题型：完形填空

    完形填空。
         It was on a winter morning, near Oxford, Maryland, that I set the breakfast table beside the huge
    window, which _1_ the Tred Avon River.The snow decorated the shore in white.For a moment I stood
    quietly against the bookcase, appreciating what the night's snow had _2  .    3    I leaned forward and
    peered (盯着看) close to the frosted window."It really is!" I cried out loud."There is a goose out there!
    " I _4_ to the bookcase and pulled out a pair of binoculars (望远镜).Into their sights came the   5_ of a
    large   Canada goose, very still, its wings folded tight to its sides, its _6_ frozen to the ice.Then from the
    dark sides, I saw a line of swans.They crossed   7    the west of the broad river, moving _8_ to the east.
    As I _9_, the leader swung to the right, and then the white _10_ of birds become a white circle.It floated
    from the top of the sky downward.At last, as easy as feathers coming to earth, the circle _11   the ice. 
    The swans _12_ the frozen goose! Amazingly, those bills (啄) began to work on _13  .The long necks
    were lifted and curved down, _14_. It went on for a long time.At last, the goose was free and _15_ its
    big webbed (有蹼的) feet slowly.The goose  _16   its wings as far as they would go.The swans took
    off and _17   on their eastward journey, in perfect formation, to their secret destination._18_ them, rising
    with incredible speed and joy, the goose moved into the sky.I watched them _19   they disappeared over
    the tips of the farthest trees.Only then did I realize that tears were running down my cheeks.This is a true
    story.I do not try to interpret it here.I just often   20   it in the bad moments, and tell myself, "If so for birds, why not for man?"
    (     )1. A. undertook        
    (     )2. A. destroyed        
    (     )3. A. Finally          
    (     )4. A. rushed            
    (     )5. A. figure            
    (     )6. A. head              
    (     )7. A. along            
    (     )8. A. steadily          
    (     )9. A. watched          
    (     )10. A. block            
    (     )11. A. skated on        
    (     )12. A. threatened      
    (     )13. A. the ice          
    (     )14. A. one after another
    (     )15. A. washing          
    (     )16. A. enlarged        
    (     )17. A. started          
    (     )18. A. Behind          
    (     )19. A. after            
    (     )20. A. write about          		 B. overlooked  
    B. covered      
    B. Unwillingly  
    B. returne      
    B. shadow      
    B. body        
    B. from        
    B. wildly      
    B. expecte      
    B. mass        
    B. landed on    
    B. attacked    
    B. their feather
    B. side by side
    B. protecting  
    B. spread      
    B. carried      
    B. In front of  
    B. althoug      
    B. keep up          		 C. witnessed    
    C. painted      
    C. Disappointedly
    C. advanced      
    C. cry          
    C. feet          
    C. around        
    C. highly        
    C. predicted    
    C. dot          
    C. fell down to  
    C. surrounded    
    C. the river    
    C. now and then  
    C. moving        
    C. lifted        
    C. repeated      
    C. Along with    
    C. unless        
    C. think of          		 D. passed        
    D. hidden        
    D. Suddenly      
    D. reached        
    D. baby          
    D. beak          
    D. in            
    D. closely        
    D. feared        
    D. line          
    D. broke into    
    D. killed        
    D. the shore      
    D. again and again
    D. warming        
    D. threw          
    D. stopped        
    D. Including      
    D. until          
    D. tell from      

    查看答案和解析>>

    科目：高中英语 来源： 题型：阅读理解

    Women with an hourglass figure have brains to go with their curves (曲线), scientists claim. Going in at the waist is said to be a sign of intelligence which leads to brighter children, too. Women such as Nigella Lawson with a big difference between their waist and hip measurements scored singificantly better in tests than those with thinner, straighter frames. Researchers concluded that it was not necessary for a woman to be skinny―what mattered is that her waist should be smaller than her hips. A ratio of 3:5 was found to be ideal.

    The study, by the Universities of Pittsburgh and Califrnia, involved 16,000 women and girls.

    According to the scientists, the results are no mere quirk of nature. They claim that the fat around curvy hips and thighs (大腿) holds higher levels of -3 fatty acids which are essential for the growth of the brain during pregnancy(怀孕). The fat which collects around the waist, however, is more likely to contain -6 fatty acids, which are less suited to brain growth.

    Reporting in the journal Evolution an Human Behaviour, the researchers found that the children of curvy mothers are more likely to do well in cognitive tests than others. They claim that this could help explain why the children of teenage mothers―who might not yet be physically mature enough to have developed real curves―tend to do less well in school.

    As well as boosting (提升) brainpower, －3 fatty acids found in oily fish are considered to be of huge health benefit.

    Althoug the study analysed women’s bodies only, －3 fatty acids are also stored in men’s hips. However, it is not known whether men with wide hips benefit from the same brainpower boost.

     

    72．Which shows the possible shape of an hourglass?

     

                    A.                        B.                     C.                           D.

    73．Suppose the following measurements are taken from four women. Which of them is more likely to have bright children?

    A. Waist：60cm；Hip：100cm           B. Waist：60cm；Hip：80cm

    C. Waist：55cm；Hip：60cm            D. Waist：120cm；Hip：110cm

    74．The underlined sentence“the results are no mere quirk of nature”possibly

     tells us the results      .

    A. can be explained scientifically          B. are strange and hard to explain

    C. have just come about by chance      D. are very interesting

    75．According to the researchers, teenage mothers tend to have less bright children because      .

    A. they aren’t so good at childcare      

    B. they usually have less fat than mature women

    C. they aren’t physically strong enough      

    D. their waist and hip measurements differ less

     

    查看答案和解析>>

    同步练习册答案