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标题: 新prep cr1 1道题【没有查到之前的讨论贴】 [打印本页]

作者: yababo 时间: 2010-4-17 19:22
标题: 新prep cr1 1道题【没有查到之前的讨论贴】
Tiger beetles are such fast runners that they can capture virtually any nonflying insect. However, when running toward an insect, the beetles intermittently stop, and then, a moment later, resume their attack.

erhaps they cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running tiger beetles are unable to process the resulting rapidly changing visual information, and so quickly go blind and stop.

Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the two hypotheses and undermine the other?

(A) When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately turns and runs away without its usual intermittent stopping.
(B) In pursuing a moving insect, the beetles usually respond immediately to changes in the insect's direction, and pause equally frequently whether the chase is up or down an incline.
(C) The beetles maintain a fixed time interval between pauses, although when an insect that had been stationary begins to flee, the beetle increases its speed after its next pause.
(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
(E) When an obstacle is suddenly introduced just in front of running beetles, the beetles sometimes stop immediately, but they never respond by running around the barrier.
解：T在抓移动的昆虫的时候，会停下，过一会继续追捕。这种暂停可能是因为T不能保持速度，或是不能及时调整方向。支持其中之一，削弱另一种的是=》

谢谢NN们不吝赐教～

作者: lovepiao 时间: 2010-4-17 20:10
LZ的题号不对所以查不到吧~新PREP逻辑没有从第一题开始的。。。都是从69题开始~

作者: hughlv 时间: 2010-4-18 00:58
我在这个帖子回答过了：http://forum.chasedream.com/GMAT_CR/thread-451429-1-1.html

作者: chy48339145 时间: 2010-4-28 17:50
点来点去还是回到这个贴~

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