CR基礎（三）：首輪選項初步篩選
五個選項快速抓重點，無關（或者方向明顯相反）的直接在初步篩選時剃掉，看似有關但是不確定細節的抓到選項重點後回去細部檢查，二度刪去。
「快速海選靠主題方向」->「剩餘選項抓到重點後進行二度回文定位打擊」就是Dustin實戰中的邏輯做題思維。
什麼是第一次該篩選掉的選項？
- 能夠輕易判斷出來的無關選項。
- 與題幹所問態度相反的選項。（Ex. 問削弱給加強）
態度相反我知道，但是無關有哪些？
萬一選項/結論長或複雜，怎樣能成功抓到選項的重點？
然而，讀選項的時候讀懂「重點」是非常重要的。如果讀錯重點，就會搞錯選項想強調的方向，很容易多想一層或少想一層，甚至選到簡單的基礎錯誤。
實戰中結論主題跟每個選項快速抓重點的模式，其實就是一個詞「是否…」。加上是否在唸一遍，結論跟選項的強調重點就出來了。
比如：
Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives.However, since there are several winemakers who add sulfites to none of the wines they produce, people who would like todrink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction tosulfites.
Which of the following is an assumption on which the argument depends?
(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do notinvolve adding any potentially allergenic substances to their wine.
(B) Not all forms of sulfite are equally likely to produce the allergic reaction.
(C) Wine is the only beverage to which sulfites are commonly added.
(D) Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
(E) Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce anallergic reaction in someone who drinks these wines.
結論：people who would like to drink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction to sulfites.
（這時簡化可能會漏掉一些細節，所以等下需要根據選項抓到的重點反覆回來二度定位。注意等下BCD的判斷流程）
(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.「廠商是不是可以不添加sulfite就達到防腐效益」
感受得出來重點在「酒是否能防腐」，跟主題「人是否不過敏」無關。
(B) Not all forms of sulfite are equally likely to produce the allergic reaction.「是不是並非所有的sulfite都會導致過敏」
感受得出來這個選項在強調各種sulfite之間是否有不同，但是有提到「人是否會過敏」->回文檢查發現sulfite被視為一個整體敘述
(C) Wine is the only beverage to which sulfites are commonly added.「紅酒是不是唯一一種加了sulfites的飲料」
感覺出來重點在「還有沒有其他飲料」，且sulfite跟過敏有關->回文檢查發現結論以框定範圍在”would like to drink wine”
(D) Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.「是不是除了s之外還有其他物質會導致過敏」
感覺出來重點在「有沒有其他物質」->回文檢查發現結論以框定範圍在”reaction to sulfites”
(E) Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce an allergic reaction in someone who drinks these wines.
About Dustin
最不專業的GMAT教學分享平台。
最討厭商學院卻考了GMAT。
為GMAT考生打造的輔助學習網站。
（那個，拜託，不要叫我老師或顧問。）