2005年全國碩士研究生考試英語真題及答案1

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2005年全國碩士研究生考試英語真題及答案
    Section I: Use of English
    Directions:
    Read the following text. Choose the best word(s) for each numbered blank and mark [A], [B], [C] or [D] on ANSWER SHEET 1 (10 points)
    The human nose is an underrated tool. Humans are often thought to be insensitive smellers compared with animals, __1__ this is largely because, __2__ animals, we stand upright. This means that our noses are __3__ to perceiving those smells which float through the air, __4__ the majority of smells which stick to surfaces. In fact, __5__, we are extremely sensitive to smells, __6__ we do not generally realize it. Our noses are capable of __7__ human smells even when these are __8__ to far below one part in one million.
    Strangely, some people find that they can smell one type of flower but not another, __9__ others are sensitive to the smells of both flowers. This may be because some people do not have the genes necessary to generate __10__ smell receptors in the nose. These receptors are the cells which sense smells and send __11__ to the brain. However, it has been found that even people insensitive to a certain smell __12__ can suddenly become sensitive to it when __13__ to it often enough.
    The explanation for insensitivity to smell seems to be that brain finds it __14__ to keep all smell receptors working all the time but can __15__ new receptors if necessary. This may __16__ explain why we are not usually sensitive to our own smells we simply do not need to be. We are not __17__ of the usual smell of our own house but we __18__ new smells when we visit someone else’s. The brain finds it best to keep smell receptors __19__ for unfamiliar and emergency signals __20__ the smell of smoke, which might indicate the danger of fire.
    1. [A] although
    [B] as
    [C] but
    [D] while
    2. [A] above
    [B] unlike
    [C] excluding
    [D] besides
    3. [A] limited
    [B] committed
    [C] dedicated
    [D] confined
    4. [A] catching
    [B] ignoring
    [C] missing
    [D] tracking
    5. [A] anyway
    [B] though
    [C] instead
    [D] therefore
    6. [A] even if
    [B] if only
    [C] only if
    [D] as if
    7. [A] distinguishing
    [B] discovering
    [C] determining
    [D] detecting
    8. [A] diluted
    [B] dissolved
    [C] determining
    [D] diffused
    9. [A] when
    [B] since
    [C] for
    [D] whereas
    10. [A] unusual
    [B] particular
    [C] unique
    [D] typical
    11. [A] signs
    [B] stimuli
    [C] messages
    [D] impulses
    12. [A] at first
    [B] at all
    [C] at large
    [D] at times
    13. [A] subjected
    [B] left
    [C] drawn
    [D] exposed
    14. [A] ineffective
    [B] incompetent
    [C] inefficient
    [D] insufficient
    15. [A] introduce
    [B] summon
    [C] trigger
    [D] create
    16. [A] still
    [B] also
    [C] otherwise
    [D] nevertheless
    17. [A] sure
    [B] sick
    [C] aware
    [D] tired
    18. [A] tolerate
    [B] repel
    [C] neglect
    [D] notice
    19. [A] available
    [B] reliable
    [C] identifiable
    [D] suitable
    20. [A] similar to
    [B] such as
    [C] along with
    [D] aside from