标题: 为嘛不是B,是D呢？？？？？ [打印本页] 作者: 小黛安 时间: 2011-9-2 11:32 标题: 为嘛不是B,是D呢？？？？？ The wild mouflon sheep of the island of Corsica are direct descendants of sheep that escaped from domestication on the island 8,000 years ago. They therefore provide archaeologists with a picture of what some early domesticated sheep looked like, before the deliberate selective breeding that produced modern domesticated sheep began. The argument above makes which of the following assumptions?B (A) The domesticated sheep of 8,000 years ago were quite dissimilar from the wild sheep of the time. (B) There are no other existing breeds of sheep that escaped from domestication at about the same time as the forebears of the mouflon. (C) Modern domesticated sheep are direct descendants of sheep that were wild 8,000 years ago. (D) Mouflon sheep are more similar to their forebears of 8,000 years ago than modern domesticated sheep are to theirs. (E) The climate of Corsica has not changed at all in the last 8,000 years.作者: superfans124 时间: 2011-9-2 23:56
因为如果当初没有其他种类的羊和逃生的mouflon杂交传种（作用就会和最后一句deliberate selective breeding类似了），那么现在野生的mouflon血统就是最接近8000年前的原始mouflon，也就能最准确的反应8000前mouflon羊的样貌。