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说一种 primate可以在树上 upright walking (我理解的就是直立行走), 这种primate 跟 chimpanzee human 有共同的 ancestor. 所以呢: 以前说的人 (还是 ancestor) 是在适应了 grassland 之后才学会直立行走的说法是错误的.
P: 某种灵长类动物本来就有在树上直立行走的能力; P: 猿猴和这种灵长类动物有同一个祖先; C: 所以, 人类适应了grassland才会直立行走的理论是错的
Weaken?
方向: 猿猴和灵长类动物的不同点在哪?
10000年前, 那是后的人就开始用 orcher. 离现在的年代稍微近一点 (但是还是 prehistoric) 的人用 orcher创造 artwork, 所以得出结论: 10000年前的人就开始创造艺术.
P: 离现在稍微近一点的年代有人用O的东西创造了artwork; P: 一万年前有人用O; C: 10000年前就有人开始用O这种东西来创造artwork
Weaken?
方向: 他因, 找出10000年前和离现在近一点年代的相关不同点
Editor: Articles in Gardening Magazine often spur sales of the plants they describe, particularly among people new to gardening. Accordingly, we will no longer publish articles or accept advertisements praising the beauty of rare wildflowers. Most such plants sold to gardeners have been difficult to propagate under cultivation, so plant sellers often collect them in the wild. Our new policy is part of our efforts to halt this yearly plundering of Our native plant populations.
手段: 不再夸赞哪种花好看通过某一本杂志; 目的: 防止人们去摘花
背景: 花也比较难自己培育, 需要采摘
Which of the following, if true, casts the most doubt on the wisdom of the magazine's new policy as a way of pursuing the intended effect?
E. Revenues from sales of plants collected in the wild are supporting the discovery of new low-cost techniques enabling rare wildflowers to be readily propagated in nurseries.
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