标题: 陈向东里的一道题引出的问题-它因消弱和支持项的困惑 [打印本页] 作者: Joseph_lin 时间: 2011-6-5 14:18 标题: 陈向东里的一道题引出的问题-它因消弱和支持项的困惑 The ratio of dicorces to marriages has increased since 1940. Therefore, there must be a greater proportion of children living with only natural parent than there was in 1940. Which of the following, if ture, most strongly weakens the inference drawn above? A The number of marriages entered into by women twenty-five to thirty-five years old has decreased since 1940. B When there is a divorce , children are often given the option of deciding which parent they want to live with. C Since 1940 the average number of children in a family has remained approximately steady and has not been subject to wide fluctuations. D Before 1940 relatively few children whose parents both died were adopted into single-parent families. E The proportion of children who must be raised by one parent because the other has died has decreased since 1940 as a result of medical advances. 不好意思，早上用手机发的，所以前面那个贴不完整，这道题的答案是E，直接消弱结论，说单亲家庭的孩子没有减少（因为医疗好了，父母一方死亡的少了），我这里有一个问题，就是如果有个F选项The proportion of children who can't be raised by one parent because the other has died has increased since 1940 as an eruption of disease. 这个算它因削弱嘛？我发现一个问题就是有的时候我会把一个支持项当成一个它因行削弱项来选，因为通常一个结论是原因导致结果的话，支持项和它因削弱项都是支持这个结果的，而这个时候我选的那个它因削弱项，答案却说是一个支持项，这另我非常困惑？大家有什么解决这个问题的好方法嘛？作者: Joseph_lin 时间: 2011-6-5 23:20
UP