2005年考研英语真题及答案完整版

    为了方便考生备考英语，聚英考研网整理了2005年考研英语真题及答案完整版，部分详情如下：

  Section IUse 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] dispersed [D] diffused

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