以下是引用juningw在2005-4-1 13:37:00的发言:呵呵,偶来说两句。 这题答案确定是C,因为B根本不对,文中写道: However, anthropologist (10) Shepard Krech points out that large animal species vanished even in areas where there is no evidence to demon- strate that Paleoindians hunted them. Nor were extinctions confined to large (15) animals: small animals, plants, and insects disappeared, presumably not all through human consumption. Krech also contradicts Martin’s exclusion of climatic change as an explanation by (20) asserting that widespread climatic change did indeed occur at the end of the Pleistocene. 我突出显示的部分,已经明确说了Krech并不是说human没有消费这些生物,只是不全是。也即,这个不是这些生物灭绝的主要原因。那是什么?Krech继续说,反对Martin把气候变化作为生物灭绝的原因之外,而是作为第一位的原因。而第二位的原因是人。 因此,B说人消费了这些生物,能反对Krech的论点吗?实际上是加强,而不是削弱。必错。 C说气候一直在变化,就很好削弱了Krech的理论,因为它的基础就是气候的变化和这些生物的灭绝是同时的。 逻辑很清楚的啊。。。。 欢迎大砖!
GG,我支持你!我的思路与你完全一样! |