17. Members of the Amazonian Akabe people commonly take an early-morning drink of a tea made from the leaves of a forest plant. Although they greatly enjoy this drink, at dawn they drink it only in small amounts. Anthropologists hypothesize that since this tea is extraordinarily high in caffeine, the explanation for the Akabe's not drinking more of it at dawn is that high caffeine intake would destroy the surefootedness that their daily tasks require.
Which one of the following, if true, most seriously calls the anthropologists' explanation into question?
(A) The drink is full of nutrients otherwise absent from the Akabe diet
(B) The Akabe also drink the tea in the evening, after their day's work is done.
(C) The leaves used for the tea contain a soluble narcotic.
(D) Akabe children are introduced to the tea in only a very weak form.
(E) When celebrating, the Akabe drink the tea in large quantities.
答案是c !! 不了!!
题目编号不对,
请牛牛看看,解惑啊
原文就某地方人早上少量喝一种茶（而不是大量）的原因进行解释。人类学家认为是因为其中含大量caffeine 。理由有两个：1。这种茶含大量caffeine 。2。大量吸入caffeine 会破坏稳健。答案应该提出不同解释，说不是caffeine 使他们喝少量这种茶。C正是这个意思，说是茶含麻醉剂使他们喝少量的茶。E并没提出另外的解释，它说的是晚上，原文要解释的是早上，OUT OFSCOPE
c说是茶含麻醉剂，但并不能推出茶不含咖非因啊？
e说欢庆时，土人们都吃大量的茶，《欢庆要很大力量，是不是直接削弱？？》
请再指点
茶含麻醉剂使他们喝少量的茶。
why?
请指点
1。麻醉剂吃多了人都没知觉了，还能上班吗。
2。“但并不能推出茶不含咖非因啊”，这是WEAKEN题，不需要这条件，，只要能使它对证据的证明力削弱就行。你陷入MUST BE的陷阱。其实MUST BE在逻辑中除归纳外是很少的，见连接。
3。，《欢庆要很大力量，是不是直接削弱？？》这个联想也太大了，没见过庆祝搞的污烟瘴气的吗。就像酒会，那真的是destroy the surefootedness 。所以E对原因没作用。
18楼
http://forum.chasedream.com/dispbbs.asp?boardid=24&star=2&replyid=573244&id=65566&skin=0&page=1Got it !! thanks a lot !!
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