俺也说2句, 首先我支持B, 通过看选项,我们留下B和C进行筛选: B New discoveries indicating that Paleoindians made use of the small animals, plants, and insects that became extinct C Additional evidence indicating that widespread climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras 看原文: 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. 根据ETS的逻辑理论: A 推出B 但是不能由B就推出一定是A, 根据理解我们来看看上面文章 Martin认为P人类的到来=A 导致 物种灭绝 B, 或者 P人类使用了小动物=A 导致 物种灭绝B 而S.K.认为:(黄色部分)(presumably not all through human consumption) 也就是 物种灭绝B 不能推测出 P人类使用了小动物=A (即 B 不能推出A) S.K.还认为 Martin 把 climate change =C 也可以推出 物种灭绝B 给排除了 即 (climate change) C 导致 物种灭绝B 问题让我们支持Martin, 削弱S.K. 那么有2个途径: 1。 P人类使用了小动物=A 就一定导致 物种灭绝B 2。物种灭绝和天气没有关系 选项B New discoveries indicating that Paleoindians made use of the small animals, plants, and insects that became extinct ( A 推出了B 支持了Martin) 而选项C Additional evidence indicating that widespread climatic change occurred not only at the end of the Pleistocene era but also in previous and subsequent eras 这句话很多人认为物种灭绝和天气没有关系。因为如果有关系,物种在以前早就灭绝了,也就没有11000年前的故事了。其实不然,仔细想想,如果在22000年前,发生的climate change 导致了物种灭绝,然后又慢慢的出现了11000年前的其它物种。 这样不也说得过去么,所以C可能削弱,也可能不削弱S.K.的说法。 说的太多了,可能太绕了, 就看后面11行就行了。 |