GMAT逻辑练习题及解析(一)-智课教育.pdfVIP

智 课 网 G M A T 备 考 资料 GMAT逻辑练习题及解析（一）-智课教育 熟能生巧，只有不断练习才能强化知识点。小编为大家整理了难度 系数为3星的三道GMAT逻辑练习题，希望对考生备考GMAT逻辑有所 帮助。 NO.1难度系数★★★ Statistics over four consecutive years showed that four percent more automobile accidents happened in California during the week following the switch to daylight saving time and during the week following the switch back to standard time than occurred the week before each event. These statistics show that these time changes adversely affect the alertness of California drivers. The conclusion in the argument above is based on which of the following assumptions? (A) Drivers in California as well as those in the rest of the United States have similar driving patterns. (B) The observed increases in accident rates are due almost entirely to an increase in the number of minor accidents. (C) Four years is not a sufficiently long period of time over which to judge the phenomenon described. (D) There are no other factors such as school vacations or holiday celebrations that cause accident rates to rise during these weeks. (E) A time change at any other time of year would not produce a similar increase in accident rates. NO.2难度系数★★★ Prolonged and unseasonable frosts produce frost rings in deciduous trees, which grow in moderate climates. Frost rings do not appear in any of the fossilized deciduous trees that have been found in Antarctica. Hence, it is unlikely that such frosts occurred in Antarctica at the time the fossilized trees lived. Which of the following is an assumption on which the argument depends? (A) There are fossilized nondeciduous trees from Antarctica that bear frost rings. (B) Deciduous trees are more likely to bear frost rings than are other tree varieties. (C) The process of fossilization does not completely obscure frost rings in deciduous trees. (D) Present-day deciduous trees are more sensitive to changes in temperature than were the deciduous trees of ancient Antarctica. (E) Prolonged and unseasonable frosts that might have occurred i