看板 GMAT 關於我們 聯絡資訊
一步一步地看正式考試時,我們該如何做題目。 ※ 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? step 1. 先看這一行,知道這題是"解決矛盾題"。 所以等等(1)看題目的時候,記得要找出矛盾雙方 (2)看選項的時候,記得要同時滿足矛盾雙方的結果喔! --- step 2. 讀題目: 93'之後的新車採用新規定,廢氣減排 題目的矛盾雙方為: 1.D國幾乎全境在93年之後廢氣顯著減少 2.D國的首都廢氣卻沒有顯著減少(尤其首都的新車又很多) 只要你能把這兩行列出來(事實上這也是要考gmat所必須具備的必要能力) 就明顯地發現:這個矛盾兩端的差異點在於"全體/個體" 也就是"首都"到底出了什麼問題?讓他跟D國其他地方比起來這麼與眾不同? 到這裡我們心裡已有了底:正確選項一定要指出首都的"獨特性" : A. More of the cars in Donia's capital city were made before 1993 than after : 1993. 同意你的想法,但在實戰中,如果我不知道"新車"的明確定義是不是指93'後的車子 這個選項我就會保留繼續讀其他選項,最後再來做抉擇 畢竟這是我自己的分數,而gmat好像也沒有一個申訴題目要分數的管道, 所以小心為上囉。 (定義不明,保留) : B. The number of new cars sold per year in Donia has declined slightly since : 1993. 沒有指出首都的獨特性,(無關,刪去)。 : C. Pollutants other than nitrogen dioxide that are emitted by automobiles : have also been significantly reduced in Donia since 1993. 跟其他污染物無關,(無關,刪去) : D. Many Donians who own cars made before 1993 have had catalytic converters : installed in their cars. 同B。 : E. Most car trips in Donia's capital city are too short for the catalytic : converter to reach its effective working temperature. 因為天龍國的人都喜歡開短程,短到淨化器都還沒熱機完成,所以廢氣也無法淨化。 明確指出了首都的獨特性,也解釋了為什麼廢氣仍然居高不下。 最後把這個選項跟A比較:相較於A選項的new car定義不明確, E選項明確地解釋了矛盾,所以最後抉擇我會選(E), 畢竟題目要的是MOST help to explain。 最後一提,這題的new cars應該指的是93年後採用新規定的車子沒有錯。 因為new cars第一次出現的地方是"required in all new cars in Donia since 1993" 後面的修飾成分指出了new cars是1993年之後的, 而前面的主詞跟動詞也告訴我們這些new cars被規定加裝淨化器 文章後面各處出現的new cars應該都會指代回上面這句的同詞 所以'new cars=93年後出產加裝淨化器的汽車' 是沒有問題的。 但這樣A選項就是明顯的"睜眼說瞎話", 跟題目的事實"the proportion of new cars in Donia's capital city has always been comparatively high,..."衝突。 希望有解決到你的問題。 Dustin : 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: 1.162.23.183 ※ 編輯: danyuchn 來自: 1.162.23.183 (08/20 09:46)
ame312:thanks 看來我思維還不夠嚴謹 哈 08/20 23:08