Re: [CR. ] PP3-104

看板GMAT (GMAT入學考試)作者genbin時間13年前 (2012/08/19 16:33)推噓0(0推 0噓 1→)

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※ 引述《ame312 ()》之銘言： : Nitrogen dioxide is a pollutant emitted by automobiles. Catalytic : converters, devices designed to reduce nitrogen dioxide emissions, have been : required in all new cars in Donia since 1993, and as a result, nitrogen : dioxide emissions have been significantly reduced throughout most of the : country. Yet although the proportion of new cars in Donia's capital city has : always been comparatively high, nitrogen dioxide emissions there have showed : only an insignificant decline since 1993. : Which of the following, if true, most helps to explain the insignificant : decline in nitrogen dioxide emissions in Donia's capital city? 重點在於全國都有顯著下降而在city裡卻只有小幅變動選項A 可以削弱原文中"新車proportion較高"的立論但A選項僅說首都裡1993以前生產的汽車較1993年以後生產的汽車多首都裡1993年以後生產的汽車的比例仍有可能遠高過全國平均可能首都新車有55%是1993年前生產然而全國平均是70% 欠缺進一步論述 : A. More of the cars in Donia's capital city were made before 1993 than after : 1993. : B. The number of new cars sold per year in Donia has declined slightly since : 1993. : C. Pollutants other than nitrogen dioxide that are emitted by automobiles : have also been significantly reduced in Donia since 1993. : D. Many Donians who own cars made before 1993 have had catalytic converters : installed in their cars. : E. Most car trips in Donia's capital city are too short for the catalytic : converter to reach its effective working temperature. : 正確答案:(E) : 想請教為何(A)選項不能是正確答案? : 我一開始的想法是: : 文中提到新車比例很高， : (Yet although the proportion of new cars in Donia's capital city has : always been comparatively high.) : 但可能有些新車是1993之前製造的， : 所以雖然新車比例高，但nitrogen dioxide emissions仍高? : 還是說我誤會了題目中的意思， : "Catalytic converters have been required in all new cars in Donia since 1993" : 跟何時(1993前/後)製造出廠無關，只要是新車就必須安裝此converters~~ : 謝謝 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 111.248.82.209