想问一下TPO11的一道题

CJX112UID: 3523131

TPO11里面第三篇阅读
Paragraph 2 indicates that the begging calls of tree nesting warblers
○ put them at more risk than ground-nesting warblers experience
○ can be heard from a greater distance than those of ground-nesting warblers
○ are more likely to conceal the signaler than those of ground-nesting warblers
○ have higher frequencies than those of ground-nesting warblers
里面说tree的蛋被咬的多 难道不是危险吗 我看解析说distance是因为ground和tree比较 但是是在前面说的 后面并没说distance阿~为什么是选2呢

oliviagao74UID: 3502725

首先，第二个选项是对的。这个应该问题不大，因为第二段的内容确实直接指出了这一点
不选第一个选项的原因可能是因为，实验中咬的比较多和更加危险之间的关系并不是必然。
不过确实有点牵强，坐等明白人回答。
还有，楼主，下次提问阅读最好把原文那一段文字附上来，方便大家给你解答~

附上第二段段落原文
Further evidence for the costs of begging comes from a study of differences in the begging calls of warbler species that nest on the ground versus those that nest in the relative safety of trees. The young of ground-nesting warblers produce begging cheeps of higher frequencies than do their tree-nesting relatives. These higher-frequency sounds do not travel as far, and so may better conceal the individuals producing them, who are especially vulnerable to predators in their ground nests. David Haskell created artificial nests with clay eggs and placed them on the ground beside a tape recorder that played the begging calls of either tree-nesting or of ground-nesting warblers. The egg "advertised" by the tree-nesters' begging calls were found bitten significantly more often than the eggs associated with the ground-nesters' calls.

CJX112UID: 3523131

oliviagao74 发表于 2014-5-24 14:05
首先，第二个选项是对的。这个应该问题不大，因为第二段的内容确实直接指出了这一点
不选第一个选项的原因 ...

谢谢你~当时怎么回复我都没有看到 刚才翻个人页面的时候才看到 尴尬