GMAT逻辑练习标准规范格式教大家跟随GMAT逻辑复习大队的步伐来每日练习GMAT逻辑题目，相信通过坚持不懈的努力，大家都能有很大提升。
练习介绍：
1)每日跟帖练习模式：
1. 计时看问题和题干，一般在45s内。
2. 先不看选项、不看题干按自己的理解写出逻辑链。
3. 合理推测正确选项的可能方向
4. 看选项，选出正确答案
5. 校对答案，对错误选项给出错误原因和类型的解释，对正确选项分析其与题干逻辑链的关系。
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.
【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
GMAT逻辑练习标准规范格式中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。前程百利小编在此静候大家GMAT考试的佳音。
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