求助！PREP1-24

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甲虫飞着飞着要停有两个可能的原因，一是因为累的跑不动（体力论），二是调整视力（视力论）

(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.
当猎物面对beetle飞来时，beetle马上跑走，没有边飞边停。与题目条件不符

(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.
追猎物时，beetle根据猎物的位置变化马上转变（否定视力论），并且无论猎物上坡还是下坡都以一样的频率休息（否定体力论，假若支持累要休息，上坡休息应该更频繁）。此选项2个原因都否定了

(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.
beetle休息之间的时间是固定的，尽管当一只静止不动的猎物准备逃跑时，beetle在下一次休息后会加快速度。每次飞的时间固定，但是会加速，否定了体力论（若支持体力论，速度快时飞的时间应该短）。支持了视力论，beetle体力没有问题，可还是要pause，其目的就是要定位，看准了方向再加速

(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
如果当beetle休息时，它还没有赶上它追的猎物，beetle就会结束追赶。无关项

(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.
当追赶过程中beetle前面有阻碍物时，beetle有时会立马停止，但是他们不会围障碍物转。无关项

-- by 会员 aomeisoft7 (2010/9/21 17:14:41)

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甲虫飞着飞着要停有两个可能的原因，一是因为累的跑不动（体力论），二是调整视力（视力论）

(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.
当猎物面对beetle飞来时，beetle马上跑走，没有边飞边停。与题目条件不符

(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.
追猎物时，beetle根据猎物的位置变化马上转变（否定视力论），并且无论猎物上坡还是下坡都以一样的频率休息（否定体力论，假若支持累要休息，上坡休息应该更频繁）。此选项2个原因都否定了

(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.
beetle休息之间的时间是固定的，尽管当一只静止不动的猎物准备逃跑时，beetle在下一次休息后会加快速度。每次飞的时间固定，但是会加速，否定了体力论（若支持体力论，速度快时飞的时间应该短）。支持了视力论，beetle体力没有问题，可还是要pause，其目的就是要定位，看准了方向再加速

(D) If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit.
如果当beetle休息时，它还没有赶上它追的猎物，beetle就会结束追赶。无关项

(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.
当追赶过程中beetle前面有阻碍物时，beetle有时会立马停止，但是他们不会围障碍物转。无关项

-- by 会员 aomeisoft7 (2010/9/21 17:14:41)

此处的体力论，视力论，很形象，很有意思。
不过对于c的解释，我的看法正好和你完全相反。
（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.
我对前半句话的翻译是，就算有一只即将要逃跑的虫子禁止不动的摆在beetles的面前，beetles也不懂得珍惜，不是奋起直追，而需要走一步，歇一步。
如果说有一只虫不停地变化方向在跑，beetles在追逐过程中不停的歇，这才说明beetles的视力有问题，必须停下来判断变化的方向。

后半句，每次beetles休息之后跑的更快，我觉得很充分说明了是因为体力的问题。
我们自己跑步时也有相同的情况啊，跑累了，歇一会，接着跑的时候，速度会加快啊。只是跑跑跑跑，就又歇菜了，又需要停顿一下。不是吗？
所以说，beetles是因为体力的原因，才会出现跑跑停停的状况，只不过每次跑，都是减速运动，一开始最快，接着慢下来，最后停下来休息。接着再反复这样一个过程。

这题我也每次做，每次都错。
我觉得C也不是很完美，这个选项说明了是beetles的体力有问题，但没有说明beetles的视力就没问题。

EmilyYoung90

LS没搞清楚，首先bettles maintain a fixed time interval betwwen pauses，说明跑和停是固定的，并非bettles跑得慢了就晚点休息，跑得快了体力消耗大了就快点休息，那说明体力没问题啊。即使当一个静止不动的虫子突然逃跑的时候，bettles也没有立刻追上去，而是先停下来，再加快速度，正是说明它要调整方向。如果按照你说它要走一步歇一步的话，在他体力完全没什么消耗的情况下，还要停下来干嘛，直接加速就好了。

呓语

为啥OG上面是选B？？？？？

curtis0063

为啥OG上面是选B？？？？？

-- by 会员 呓语 (2012/2/28 14:53:42)

仔细看，OG 的选项内容和 PP1 有些不同，所以答案不一样，OG 选项有改得比较好一点，这题我认为真的搞不懂就算了，这题属极少见的题型，估计应该是在 750 的程度题。

curtis0063

(B) In pursuing a moving insect, the beetlesusually respond immediately to changes in the insect's direction, and pauseequally frequently whether the chase is up or down an incline.
B选项中，”respondimmediately to changes” weaken hypothesis 2，重点在 “pause equally frequently”，它support beetle 的确会停下来，但频率一样暗示了它并不会休息，只支持了一半，不能选。注意题目中的 they cannot maintain their pace and must pause for a moment'srest

zl9848

aomeisoft7 发表于 2010-9-21 17:14
甲虫飞着飞着要停有两个可能的原因，一是因为累的跑不动（体力论），二是调整视力（视力论）(A) When a pre ...

非常感谢！！！

steven890123

大龙你今年还考G 是准备PHD了吗

雪奈Yukina

10＃aomeisoft7解释的很好，只补充下对c选项的解释：每次休息的时间固定－加强视力论（因为调整视力时间应该是固定的无论其他条件如何变化）－削弱体力论（因为体力论暗含休息时间应该根据体力调整，不该是固定时间，而题目中即使体力加速休息时间也固定说明和体力无关） 。C is correct because keeping a fixed interval supports the visual processing hypothesis and undermines the rest hypothesis. If the pauses are needed to get a visual fix, it makes sense that the intervals would be fixed because the time needed to get a visual fix shouldn't change. However, if the beetles need to pause for rest, they should need longer pauses after they start moving faster.

恒河猴

aomeisoft7 发表于 2010-9-21 17:14
甲虫飞着飞着要停有两个可能的原因，一是因为累的跑不动（体力论），二是调整视力（视力论）(A) When a pre ...

A选项中，prey insect朝beetle跑来，beetle看见了就跑开了，不正是说明了beetle的视觉没有问题，削弱了视觉造成的停顿，加强了停顿的原因是疲劳？