【OG24-759题】In Wareland last year, 16 percent of licensed drivers under 21 and11 percent of drivers ages 21-24 were in serious accidents. By contrast, only 3 percent of licensed drivers 65 and older were involved in serious accidents. These figures clearly show that the greater experience and developed habits of caution possessed by drivers in the 65-and-older group make them far safer behind the wheel than the younger drivers are. Which of the following is an assumption on which the argument depends?_mofa留学圈mofaGRE在线题库系统_GRE在线搜题_GRE题库解析_GRE真题机经_GRE课程_GRE培训机构

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In Wareland last year, 16 percent of licensed drivers under 21 and11 percent of drivers ages 21-24 were in serious accidents. By contrast, only 3 percent of licensed drivers 65 and older were involved in serious accidents. These figures clearly show that the greater experience and developed habits of caution possessed by drivers in the 65-and-older group make them far safer behind the wheel than the younger drivers are.

Which of the following is an assumption on which the argument depends?

Drivers 65 and older do not, on average, drive very many fewer miles per year than drivers 24 and younger. Drivers 65 and older do not constitute a significantly larger percentage of licensed drivers in Wareland than drivers ages 18-24 do. Drivers 65 and older are less likely than are drivers 24 and younger to drive during weather conditions that greatly increase the risk of accidents. The difference between the accident rate of drivers under 21 and of those ages 21-24 is attributable to the greater driving experience of those in the older group. There is no age bracket for which the accident rate is lower than it is for licensed drivers 65 and older.

正确答案： A

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题干翻译
在Wareland，24岁及以下有驾照司机中21%涉及严重事故。相比之下，65岁及以上有驾照司机中只有3%涉及严重事故。这些数据清楚地表明，65岁及以上司机的更多经验和养成的谨慎习惯使他们在驾驶时比年轻司机安全得多。 逻辑链
65+事故率低→经验谨慎更安全 问题类型
假设（assumption） 推理过程
论点是65岁及以上司机因经验和谨慎习惯更安全，论据是其事故率比年轻司机低。要使论证成立，需排除其他可能导致事故率差异的因素。 选项分析
A选项：65岁及以上司机平均每年行驶里程不比24岁及以下司机少很多。如果65岁及以上司机行驶里程少很多，那事故率低可能是因为开车少，而不是经验和谨慎，该项排除了这种可能性，是论证的必要假设，当选。 B选项：65岁及以上司机在有驾照司机中的占比与他们是否更安全无关，排除。 C选项：指出65岁及以上司机可能因更少在高风险天气驾驶导致事故率低，是削弱项，排除。 D选项：讨论的是21岁以下和21 24岁司机事故率差异原因，与65岁及以上司机无关，排除。 E选项：其他年龄段事故率与65岁及以上司机因经验谨慎更安全这一论证无关，排除。

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