Re: [請益]請問黃金第47篇Begging by Nestlings

看板TOEFL_iBT (TOEFL_iBT托福)作者cyberkiller (Social retarded)時間16年前 (2010/04/19 21:44)推噓2(2推 0噓 0→)

留言2則, 2人參與討論串2/2 (看更多)

※ 引述《JohnJoe ()》之銘言： : 原文: Paragraph 2：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 eggs “advertised” by the tree-nesters' begging calls were found bitten significantly more often than the eggs associated with the ground-nesters' calls. : 選項: 4. Paragraph 2 indicates that the begging calls of tree nesting warblers a. put them at more risk than ground-nesting warblers experience b. can be heard from a greater distance than those of ground-nesting warblers c. are more likely to conceal the signaler than those of ground-nesting warblers d. have higher frequencies than those of ground nesting warblers : 正確選項是b，想請問為什麼答案是b呢? : 麻煩各位的解答了^^"謝謝紫色部份為題目定位。原文說，地上築巢的雛鳥比樹上築巢的雛鳥發出較高頻率的叫聲。而較高頻率的叫聲傳不遠。所以，題目問樹上築巢的雛鳥叫聲？-->可以傳的比較遠（b）。（a）選項：在原文中並沒有提到兩者遇敵風險的高低。（陷阱選項）（c）選項：剛好與原文相反。（d）選項：剛好與原文相反。 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.231.147.69