GMAT邏輯解題技巧：Assumption題型總結(jié)(二).

　　GMAT邏輯考試的常見題型有哪幾類?其對應(yīng)的解題技巧又有哪些呢?本文將著重對GMAT邏輯考試中的常見題型及解題技巧深入的講解，希望能夠為考生備考GMAT邏輯考試帶來幫助。

　　TN6-Q14：

　　Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.

　　Which of the following is an assumption on which the argument depends?

　　照例還是先梳理題目條件：

　　(1)很多人對某種硫酸鹽過敏，包括被廣泛加入紅酒作為防腐劑的一種硫酸鹽

　　(2)但是有的廠商沒有在他們制造的酒里面加硫酸鹽

　　結(jié)論是：想喝酒但是又對硫酸鹽過敏的酒友們可以購買上述廠商生產(chǎn)的紅酒，這樣就不用冒著過敏的危險偷偷喝酒了～

　　由本題來看，它的邏輯鏈相較于上一題比較完整，至少但看題目并沒有很明顯的缺失掉某一環(huán)，因此，這道題可以歸入排除他因型。

　　本題的中心在于酒中的硫酸鹽導(dǎo)致過敏，也就是說，這道題的前提是只要制造商不往酒里加硫酸鹽，酒里面就不含有。因此，就不能出現(xiàn)以下的可能：酒里面本來就含有導(dǎo)致過敏的硫酸鹽。

　　A. These wine makers have been able to duplicate the preservative fect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.

　　本選項說的是上述廠商可以通過不加入任何的防腐物質(zhì)來完美重現(xiàn)加入硫酸鹽時的防腐效果(也就是：我啥防腐劑都不加，但是照樣能保質(zhì)!神馬硫酸鹽防腐劑都是浮云!)，算是個非常迷惑的選項，但是還是無法充分說明酒中本來就不含有硫酸鹽。而且這個選項很明顯屬于轉(zhuǎn)移焦點：題目的中心在于過不過敏，而不是防腐問題。

　　B. Not all forms of sulfite are equally likely to produce the allergic reactions.

　　本選項說不是所有的硫酸鹽都一樣的會導(dǎo)致過敏。題目里已經(jīng)明確的說了加到酒里作為防腐劑的那一種是會導(dǎo)致過敏的，也就是說，本選項跟酒里含不含過敏硫酸鹽會不會導(dǎo)致人家過敏根本就是木有任何關(guān)系，不該偷喝酒的人還是不能偷喝。

　　C. Wine is the only beverage to which sulfites are commonly added.

　　本選項說酒是唯一一種廣泛加入硫酸鹽來防腐的飲品，也就是說，喝酒會過敏的人就乖乖喝其他飲料吧!但是很可惜，這個選項還是無法證明酒里面只要不人工加硫酸鹽就一定沒有硫酸鹽，因而屬于題干補充資料，還是無關(guān)的那一種。

　　D. Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.

　　本選項說除了硫酸鹽就沒有哪種酒里常見的物質(zhì)會引起過敏的，還是不能說明酒里面沒有天然含有的硫酸鹽，因而同上一個選項，屬于無關(guān)的題目補充資料。這個選項跟A一樣比較具有迷惑性，大家看到的時候需要小心。

　　E. Sulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

　　正解。本選項說上述廠商制造的酒里沒有自然存在的硫酸鹽，就算自然存在也沒有多到可以引起過敏的地步，也就是說，只要不加，里面就沒有。另外將這個選項取非的話，就是上述廠商制造的酒里面有自然存在的硫酸鹽，還是多到可以引起過敏的程度，會削弱題目的結(jié)論。

　　練習(xí)：

　　TN7-Q40:

　　Agricultural societies cannot exist without staple crops. Several food plants, such as kola and okra, are known to have been domesticated in western Africa, but they are all supplemental, not staple, foods. All the recorded staple crops grown in western Africa were introduced from elsewhere, beginning, at some unknown date, with rice and yams. Therore, discovering when rice and yams were introduced into western Africa would establish the earliest date at which agricultural societies could have arisen there.

　　Which of the following is an assumption on which the argument depends?

　　A. People in western Africa did not develop staple crops that they stopped cultivating once rice and yams were introduced.

　　B. There are no plants native to western Africa that, if domesticated, could serve as staple food crops.

　　C. Rice and yams were grown as staple crops by the earliest agricultural societies outside of western Africa.

　　D. Kola and okra are better suited to growing conditions in western Africa than domesticated rice and yams are.

　　E. Kola and okra were domesticated in western Africa bore rice and yams were introduced there.

　　TN16-Q38:

　　Because it was long thought that few people would watch lengthy televised political messages, most televised political advertisements, like commercial advertisements, took the form of short messages. Last year, however, one candidate produced a half-hour-long advertisement. During the half hour the advertisement was aired, a substantial portion of the viewing public tuned into the advertisement. Clearly, then, many more people are interested in watching lengthy televised political messages than was previously thought.

　　Which of the following is an assumption on which the argument depends?

　　A. The candidate’s ratings improved significantly as a result of the half-hour-long political advertisement.

　　B. Political advertisements have become increasingly influential in determining voters’ decisions at the polls.

　　C. Many people would appreciate the opportunity to become better acquainted with political candidates’ views on current political issues.

　　D. Most people who are interested in political issues watch television regularly.

　　E. Most of the viewers who tuned in to the candidate’s half-hour-long advertisement last year did not change channels after the first few minutes.

　　以上內(nèi)容對GMAT邏輯考試中的常見題型及解題技巧進行了詳細(xì)的講解，考生可以根據(jù)文中重點進行針對性的練習(xí)，掌握并熟練應(yīng)用GMAT邏輯試題的解題思路，從而在GMAT考試中取得好成績。 相關(guān)鏈接：

1.GMAT邏輯解題技巧：Assumption題型總結(jié)(一)

2.GMAT考試真人秀：廣州考場體驗

3.GMAT數(shù)學(xué)備考指導(dǎo)：常用理論小結(jié)

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