※ 引述《nemo31 (shidefan)》之銘言： : 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. 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? 題目問的是evaluating the result 等於是說，答案要的是針對該實驗發現的狀況提出解釋 如果沒有說明可能的差異原因，那就不是答案 : (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. 依答案內容沒辦法說明rural的greenhouse中植物長的比較快的原因 : (B) At both schools, the plants in the greenhouses grew much more quickly : than did plants planted outdoors in plots near the greenhouses. 範圍不對->題目沒提到outdoors的部分 : (C) The urban class conducting the experiment was larger than the rural : class conducting the experiment. 粗看有可能是答案，有說明可能的差異原因 但是如果此選項為真 那無法說明是sulfur dioxide造成，還是因為空間較大造成 (如果題目是問weaken實驗結果，則此答案最佳) : (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. 可能是答案，因為有說明兩邊差異的可能原因 : (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. 空氣濾清器換的比較快只代表都市空氣比較髒 原題第五行有說在greenhouse內的空氣都是已經去掉sulfur dioxide了 所以此選項為真也無法解釋差異原因 : 答案是D : 本來以為是AE其中之一 : 希望有人能幫忙解答,謝謝 就結果來看，因為只剩D是可能選項所以選D --

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