马上考试了~~求解答!TPO 11 阅读~begging by nestlings提问!

cinderella_wUID: 2575508

文章中没有提到adapation的事情啊~~有2道题都是这个答案,TOEFL阅读不是不用推理的嘛~

○ Songbird species that are especially vulnerable to predators have evolved ways of reducing the dangers associated with begging calls.
○ Songbird parents focus their feeding effort on the nestlings that beg loudest for food.
○ It is genetically disadvantageous for nestlings to behave as if they are really hungry when they are not really hungry.
○ The begging calls of songbird nestlings provide a good example of overly damaging cost to signalers of signaling.
○ The success with which songbird nestlings communicate their hunger to their parents is dependent on the frequencies of the nestlings' begging calls.
○ Songbird nestlings have evolved several different ways to communicate the intensity of their hunger to their parents.
我选了第4个有什么错阿?

5. The experiment described in paragraph 2 supports which of the following conclusions?
○ Predators are unable to distinguish between the begging cheeps of ground-nesting and those of tree-nesting warblers except by the differing frequencies of the calls.

○ When they can find them, predators prefer the eggs of tree-nesting warblers to those of ground-nesting warblers.

○ The higher frequencies of the begging cheeps of ground-nesting warblers are an adaptation to the threat that ground-nesting birds face from predators

○ The danger of begging depends more on the frequency of the begging cheep than on how loud it is.

求解答~~

szzzwno123UID: 2783477

顶啊~有没有人能回答下这两个问题啊，TPO11的阅读就错了这两个。。

parisyUID: 2622097

同求这两题解释ing我这两题都选了第四，表示对正确答案的正确性理解不能

juliagoUID: 2912431

题目问的是conclusion ， 原文本中并没有强调 是frequency 还是loud 导致danger的啊
！它哪一段讲主要是adapation

maudeminkUID: 3134902

同问啊！！！

尤其是多选的那个，我想不出为什么答案会有gentetically disadvantageous。。。as if they are hungry when they are not really hungry

文中最后不是说了songbird不会在不饿的时候乱叫是为了整个种族的基金得到延续么，又怎么会有genetcally disadvantage呢？

求解答！！！