[求助]Prep1-48

雪奈Yukina

shallbytwo 发表于 2011-4-21 10:39
从选项a的意思可以理解为，观察pw的下蛋，如果pw只下了一个egg，那么这个host egg就是最小的可以下蛋的尺寸 ...

dxfy3572

PepperAnnie 发表于 2010-3-14 20:44
个人认为选C项中说的是lay into the eggs ofdifferent host species，文章中说的产卵数量是根据宿主卵的siz ...

大家睁大眼睛看这里啊！！！
这里的维度已经不是size了，偷换成species了！！
太多争议题，都是因为读得不够仔细！无论CR还是SC！！！

争取一次就过

18L  正解

sivenhuidao1995

нандин 发表于 2007-11-11 19:04
是不是这个意思：题目问的是Which of the following conclusions can properly be drawn from the informat ...

同意！               

frankzheng43

Ron:
the passage states that "Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg".
therefore, we could observe the parasite's behavior until we saw a host egg for which "exactly the right number" was 1 egg.
since the wasp cannot lay less than 1 egg, this particular egg would then be the smallest possible host egg.
therefore, we should be able to determine the smallest possible host egg, so (a) is justified.

oumaige

(A) The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior. egg-laying behavior 决定了size of the smallest host egg是结合了不能过多也不能过少这一信息得出来的， 属于合理性推论。 其难点在于 前面是 知道 一个host egg 的size， 就知道 要parasitize多少， 这里是如果只parasitize一个， 那么是否能知道 the size of the host egg ， 实际上二者意思 是 一样的 。
(B) Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.文中没有信息能够支撑lack defense这种说法
(C) Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.文中没有信息能够支撑 learn这一 说法
(D) Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs.  文中没有信息支撑more quickly这一说法
(E) Parasitic wasps use visual clues to calculate the size of a host egg. 文中没有信息支撑 visual clues这一说法