※ 引述《slin (slin)》之铭言： : Adult female rats who have never before encountered rat pups : will start to show maternal behaviors after being confined with a : pup for about seven days. This period can be considerably shortened : by disabling the female’s sense of smell or by removing the scent-producing : glands of the pup. : Which of the following hypotheses best explains the contrast described above? 题意: 成年但还未接触幼鼠 的母鼠 如果把他们和幼鼠关在一起的话 大约七天会有母性的行为 如果说 把成年母鼠的嗅觉除去 或是把幼鼠分泌气味的拿掉 母鼠会快一点去照顾幼鼠 (就是说不用到七天 就会去发挥母爱了) contrast: 有嗅觉 七天 <--->没嗅觉 较短时间 我的看法是对比在这拉 可以闻到幼鼠的气味 应该会较快发挥母爱 为啥还拖比较久 --->找解释 : (A) The sense of smell in adult female rats is more acute than that in rat : pups. 成年母鼠的嗅觉较敏锐 ...无关 如果较敏锐的话 为啥拿掉嗅觉後 反而可缩短 : (B) The amount of scent produced by rat pups increases when they are in the : presence of a female rat that did not bear them. 幼鼠分泌的气味 会增加 ...无关 如果可以解释的话 为什麽去除掉母鼠的嗅觉器官 和幼鼠的scent-producing glands 反而可缩短呢 : (C) Female rats that have given birth are more affected by olfactory cues : than are female rats that have never given birth. 有生过的母鼠较易受影响 题目没有拿生过 和未生过的做比较 : (D) A female rat that has given birth shows maternal behavior toward rat pups : that she did not bear more quickly than does a female rat that has never : given birth. 同C : (E) The development of a female rat’s maternal interest in a rat pup that ~~~~~~~~~~~~~ 发展 和时间相关 要注意 : she did not bear is inhibited by the odor of the pup. ~~~~~~~~~~~~~ 闻到味道了 所以受限 那闻不到味道 变快了 (好像可以理解) 概念大概是 成年母鼠 闻到幼鼠散发的气味 知道他不是自己的小孩 所以不会去照顾 所以时间被拉长了 闻不到味道 不知道是不是自己的小孩 看到幼鼠 就先去照顾了 : 答案是E : 这题我跟我朋友讨论了很久,我们对於题目的意思,以及问题中的"contrast",还有正确 : 答案为什麽是E,都有所疑惑,是不是可以请版友不吝告知,谢谢大家了,,, --

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