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题库 / Prep2007E1-CR-24
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. Perhaps 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?
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.
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.
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.
If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
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.
○A 削弱原因一、二。” immediately turns” 不存在视力问题，削弱原因二；"runs away without its usual intermittent stopping”不存在体力与视力问题，削弱原因一、二。
○B 只削弱原因二。”respond immediately to changes in the insect's direction” 不存在视力问题，削弱原因二；”pause equally frequently” 重复题干，不排除有第三种原因的可能，对原因一、二不构成逻辑推理关系。
○C 只加强原因一。”increases its speed after its next pause” 存在体力问题，加强原因一；对原因二不构成逻辑推理关系。
○D 对原因一、二不构成逻辑推理关系。
○E 只加强原因二。”never respond by running around the barrier” 若视力好，则会绕过障碍，存在视力问题，加强原因二；对原因一不构成逻辑推理关系。
C的时候甲虫的内心戏是这样的：饲料跑了！不行我缓缓，太累了。。。追！
也就是说他能在跑的时候看见，但是他每次“缓一缓”的时间是一样的意味着他是因为累所以不能追上
你这个内心戏是真的皮 哈哈哈哈
哈哈 ，透彻
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