Paragraph 5:If parent birds use begging intensity to direct food to healthy offspring capable of vigorous begging, then parents should make food delivery decisions on the basis of their offsprings calls. Indeed, if you take baby tree swallows out of a nest for an hour feeding half the set and starving the other half, when the birds are replaced in the nest, the starved youngsters beg more loudly than the fed birds, and the parent birds feed the active beggars more than those who beg less vigorously.
10. It can be inferred from paragraphs 4 and 5 that parent songbirds normally do not feed
○ nestlings that are too weak to beg for food as vigorously as their nestmates
○ more than one hungry nestling during a single visit to the nest
○ offspring that were fed by the parents on the previous visit to the nest
○ nestlings that have been removed and then later put back into their nest
1#坠坠芙蓉影答案的翻译没问题 选项也应该是A 文章里说越饿叫得越响是因为 叫得越响父母才会给吃的(then parents should make food delivery decisions on the basis of their offsprings calls) 而题目问的是能推断出父母不去喂什么样的雏鸟 那自然就是不去喂叫声比较弱的啊