prep cr1-17 弱弱的问

tanglang0921

17.    (27669-!-item-!-188;#058&003302)

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.  lants 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?

(A) The 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.
(B) At both schools, the plants in the greenhouses grew much more quickly than did plants planted outdoors in plots near the greenhouses.
(C) The urban class conducting the experiment was larger than the rural class conducting the experiment.
(D) Heavy vehicular traffic such as is found in cities constantly deposits grime on greenhouse windows, reducing the amount of light that reaches the plants inside.
(E) Because 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.
虽然知道其它选项都不对，但d选项不是含有非关联的词语么？   这道是评价题来的吧？   刚做prep非常打击啊。。。。。谢谢大家帮帮忙~

gege112

我懂了大概的意思，但我还有一个弱智的问题，就是说， 题目中说的“evaluating the result”, 中的result是指什么？是不是指 “城市中的植物仍然比农村里的植物生长慢”, 这是一个事实，为什么要evaluate 他呢？ 在此先谢谢大家了~~~！

bonfin

thx

candice1989

thx~

sallyruru

thx~

tanglang0921

太谢谢了~雪中送炭~

loverwy

这题是解释题，take into account

就是要你解释为什么在排除了SD之后，城市温室里的植物长的还是比农村温室里的慢。就说明有其他原因导致。D正好就是说这个