og-175-尚无确切解释

philikittist

看了前人的讨论，还是不能明白，请教大家，谢谢！

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. If they laid too many eggs in a host egg, the developing wasp larvae would compete with each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would decay, killing the wasp larvae.

Which of the following conclusions can properly be drawn from the information above?

(A) The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp’s egg-laying behavior.

(B) Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.

(C) Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species.

(D) Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs

(E) Parasitic wasps use visual clues to calculate the size of a host egg.

og地解释是comparing two host eggs in which parasitic wasps have laid different numbers of eggs,it is theoretically possible to determine what size of host egg would be required for a single wasp eggs. This would be the smallest egg the wasp could parasitize, so A is the best answer.

就算能通过host egg来决定the smallest egg the wasp could parasitize，干吗非要2个比较，1个也行呀。这题我是彻底不了解ets再想什么，请大家帮我开窍！

blackhorse

我做这道题目的时候，没有楼主考虑这么复杂。

首先读到A，感觉是个答案，保留这个感觉。再看B,文中没有涉及，无关；看C，文中没有涉及experience这个概念，无关；D，文中无类似比较，无关；E，文中没有提及如何计算，无关；

就选了A。看了答案后，发现对了，也没有仔细思考。

回头仔细读了原文，说太多或者太少都会导致寄生失败，那就是中间状态的下蛋数量才合适。

而这道题是总结题目，总结题目通常采用排除法，把无关去掉。A有归纳原文的意思，其他四个都是文中没有涉及的无关。也许这样解释不足以信服，但这是个有效的做题思路。

philikittist

谢谢呀，我就是想明白ets是怎么想的，再碰到类似的题能马上反应。

hitler999

顶一把！

我看了这道题的所有讨论，但有一个和philikittist一样的问题，为什么非要比较两个host egg才能得出the size of the smallest host egg呢？一个不就已经够了吗？

这个问题还没人提过，麻烦斑竹帮忙啊。

谢谢