大全12回-20題

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20. 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?

(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.（D）

(E) The climate of Corsica has not changed at all in the last 8,000 years.請問選項b跟c為什麼不對呢?

topway7

原文说：

野生M羊是古代逃跑家羊的后代，所以考古家通过研究M羊可以描述出古代家羊的样子了（因为现代家羊已经经过了精心的优选------言外之意就是和古代家羊不一样了）。问assumption.......

b, 除了野生M羊祖先逃跑，没有其他的古代家羊也逃跑了--------这似乎是个support，表示考古家只能通过野生M羊研究了，但不能说明，研究M羊不可能描述出古代家羊的样子。

c, 现代家羊是古代野生羊的后代--------这个好像没有一点关系

d, M羊和古代家羊更相似，比现代家羊还要像---------正确答案，取反的话就能反驳结论。。。。