6)如何加入逻辑小分队? 加入逻辑小分队唯一的要求就是能坚持一个系列的每日练习。 报名规则: 请跟帖回复:报名(请注明:更新成员or练习成员)+预计考G时间。 a. 每期更新成员为5名,请在本帖报名,逻辑小分队会视报名情况进行组织调整,选出一名组长负责整个系列练习的组织和监督。 b. 每期练习成员人数不限,同样需要在本帖报名,同样按要求需要坚持每日练习。 c. 报名成功后,我会用短消息告诉你逻辑小分队的讨论群,欢迎加入我们的大家庭。
Example: 1. “Life expectancy” is the average age at death of the entire live-born population. In the middle of the nineteenth century, life expectancy in North America was 40 years, whereas now it is nearly 80 years. Thus, in those days, people must have been considered old at an age that we now consider the prime of life. Which of the following, if true, undermines the argument above? (A) In the middle of the nineteenth century, the population of North America was signi?cantly smaller than it is today. (B) Most of the gains in life expectancy in the last 150 years have come from reductions in the number of infants who die in their ?rst year of life. (C) Many of the people who live to an advanced age today do so only because of medical technology that was unknown in the nineteenth century. (D) The proportion of people who die in their seventies is signi?cantly smaller today than is the proportion of people who die in their eighties. (E) More people in the middle of the nineteenth century engaged regularly in vigorous physical activity than do so today. (白色部分为隐藏选项)
【跟帖练习示例】 1) 计时:30s 2) 逻辑链Situation(刚开始练习先写好完整逻辑链,练习到逻辑链基本清晰的时候尝试尽量简化信息、提炼最精简的逻辑链): *完整模式: Background Information: Life expectancy is the average age at death of the whole population. Premise: Life expectancy in mid-nineteenth century North America was 40 years; now it is almost 80. Conclusion: What we think of as the prime of life must have been considered old in that earlier era. 3) 推测(Prephrase: mentally formulate your answer to the question stem): the average age at death is 40 years≠the usual length of life is around 40 some other reasons that lead to the outcome: 极端值大, ?rst-year infant mortality was extremely high in earlier era. 4) 选项分析:选B *选项解释不提供固定思路,请根据自己的理解(可参考Powerscore Critical Reasoning Bible)对每一错误选项给出错误原因和类型的解释(无关选项思考清楚为什么无关),对正确选项分析其与题干逻辑链的关系。