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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.
?
邏輯鏈：這題問的就比較怪豪嚎，讓你支持一個(gè)假設(shè)駁斥另一個(gè)假設(shè)奠支，時(shí)間有限，直接讀題蝠引，這兩個(gè)假設(shè)分別是怜俐，1. 停一下再跑是跑不動(dòng)要休息 2. 停一下再跑是因?yàn)橐曈X環(huán)境變太快瞎了
A. 獵物沖著它來的時(shí)候beetle轉(zhuǎn)身就跑不停
B. 可以隨著獵物方向改變轉(zhuǎn)向梳杏，上坡下坡停的頻率一樣
C. Beetle每次停頓間隔時(shí)間一樣容贝，除了靜止的獵物開始跑的時(shí)候，beetle第一次停頓之后會(huì)增速
D. 停頓的時(shí)候如果沒有靠近目標(biāo)楼眷，就不追了
E. 突然加入障礙的時(shí)候铲汪，beetle能突然停下來，但是不會(huì)繞著障礙追罐柳。
這題最好的辦法是用排除掌腰，正確選項(xiàng)實(shí)在太難理解為什么對(duì)了！
A 不瞎也不累
B 前半句證明不瞎硝清，后半句證明不是累辅斟，兩個(gè)假設(shè)都推翻了
C 正確選項(xiàng)。停頓間隔無論如何都一樣芦拿，可以支持視覺處理假設(shè)士飒，因?yàn)槊繋酌腌姷囊曈X變化就會(huì)讓它瞎一下；該信息同時(shí)可以反駁累假設(shè)蔗崎，累假設(shè)下應(yīng)該越跑越累停頓越來越頻繁酵幕；第一次停頓之后增速，可以駁斥累假設(shè)缓苛，因?yàn)榍懊骒o止的時(shí)候是最有精神的芳撒，第一個(gè)間隔應(yīng)該比后面的間隔跑的快才對(duì)∥辞牛【誠實(shí)的說笔刹，這個(gè)選項(xiàng)怎么說都會(huì)需要很多背景知識(shí)，怎么解釋都會(huì)感覺非常扯冬耿，江湖上那么多講法舌菜，誰也不比誰講的更有道理。如果想少點(diǎn)亦镶，這道題是有機(jī)會(huì)用排除法做出來的日月「の停】
D 也許能證明不瞎，但不能證明累
E 一直是圍著瞎談的爱咬，沒提累
?C ?
?
OG13有一道類似題尺借，原題一樣，選項(xiàng)有個(gè)別差異精拟，OG13這道題選B燎斩，顯然比prep題要友好很多清晰很多。相比之下串前，prep那道題更像是出題人用力過猛瘫里，把題出壞了实蔽。
A.When a prey insect is moved directly toward a beetle that has been chasing it, the beetle immediately stops and runs away without its usual intermittent stopping. 獵物沖著它來的時(shí)候beetle轉(zhuǎn)身就跑不偷茨耄—不瞎也不累
B. In pursuing a swerving insect, a beetle alters its course while running and its pauses become more frequent as the chase progresses. 追一個(gè)很繞的獵物時(shí)，beetle可以改方向局装，越追停頓越頻繁---不瞎坛吁，累
C.In pursuing a moving insect, a beetle usually responds immediately to changes in the insect’s direction, and it pauses equally frequently whether the chase is up or down an incline. 可以隨著獵物方向改變轉(zhuǎn)向，上坡下坡停的頻率一樣—不瞎也不累
D.If, when a beetle pauses, it has not gained on the insect it is pursuing, the beetle generally ends its pursuit. 停頓的時(shí)候如果沒有靠近目標(biāo)铐尚，就不追了—不瞎
E.The faster a beetle pursues an insect fleeing directly away from it, the more frequently the beetle stops. 追的越快停頓越多—累
B?
這道OG題的正確答案就清楚很多好接受很多拨脉。
