题库 > 逻辑CR > 题目6c2mmk
题目内容
Urban air contains more sulfur dioxide than does rural air, and plants in cities typically grow more slowly than do plants in rural areas. In an experiment to see how much of the difference in growth is due to sulfur dioxide, classes in an urban and a rural school grew plants in greenhouses at their schools and filtered the greenhouse air to eliminate sulfur dioxide. Plants in the urban greenhouse grew more slowly than those in the rural greenhouse.

Which of the following, if true, would it be most important to take into account in evaluating the result?
  • AThe urban school was located in a part of the city in which levels of sulfur dioxide in the air were usually far lower than is typical for urban areas. 分析该选项
  • BAt both schools, the plants in the greenhouses grew much more quickly than did plants planted outdoors in plots near the greenhouses. 分析该选项
  • CThe urban class conducting the experiment was larger than the rural class conducting the experiment. 分析该选项
  • DHeavy vehicular traffic such as is found in cities constantly deposits grime on greenhouse windows, reducing the amount of light that reaches the plants inside. 分析该选项
  • EBecause of the higher levels of sulfur dioxide in the air at the urban school, the air filters for the urban school's greenhouse were changed more frequently than were those at the rural school. 分析该选项
显示答案
正确答案: D
  • 网友解析

题目讨论

如果对题目有疑问,欢迎来提出你的问题,热心的小伙伴会帮你解答。

  • 优质讨论
  • 最新讨论
用户头像
已经输入0个字

题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:PREP07 Test 1-17
  • 正确率:69%
  • 难度:

最新提问