[語文] PP-T1-CR-24
24. (29155-!-item-!-188;#058&003857)
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?
(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.
Ans:C
這一題真的很瘋狂，不懂C如何支持其中一個假設，削弱另一個.....
有沒有人知道呢？
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