Shergottites, the name given to three anomalous achondrites (igneous meteorites lacking chondrules) so far discovered on Earth, present scientists with a genuine enigma. Shergottites crystallized from molten rock less than 1.1 billion years ago (some 3.5 billion years later than typical achondrites) and were presumably ejected into space when an object impacted on a body similar in chemical composition to Earth. While some scientists speculate that shergottites derive from Io (a volcanically active moon of Jupiter), recent measurements suggest that since Io‘s surface is rich in sulfur and sodium, the chemical composition of its volcanic products would probably be unlike that of the shergottites. Moreover, any fragments dislodged from Io by interbody impact would be unlikely to escape the gravitational pull of Jupiter.
The only other logical source of shergottites is Mars. Space-probe photographs indicate the existence of giant volcanoes on the Martian surface. From the small number of impact craters that appear on Martian lava flows, one can estimate that the planet was volcanically active as recently as a half-billion years ago—and may be active today.
1. The passage provides information to answer which of the following questions?
(A) What is the precise age of the solar system?
(B) How did shergottites get their name?
(C) What are the chemical properties shared by shergottites and Martian soils?
(D) How volcanically active is the planet Jupiter?
(E) What is a major feature of the Martian surface?
For the following question, consider each of the choices separately and select all that apply
2. It can be inferred from the passage that each of the following is a consideration in determining whether a particular planet is a possible source of shergottites that have been discovered on Earth
(A) strength of the planet‘s field of gravity
(B) proximity of the planet to its moons
(C) chemical composition of the planet‘s surface
結構分析：
進入第五十篇之後我想要省去一些重複分享過的東西，所以這裡我就直接畫圖了
我第一次看短文章看超過三句的，這裡我看的內容有
第一：Shergottites, the name given to three anomalous achondrites (igneous meteorites lacking chondrules) so far discovered on Earth, present scientists with a genuine enigma.
第二：Shergottites crystallized from molten rock less than 1.1 billion years ago (some 3.5 billion years later than typical achondrites) and were presumably ejected into space when an object impacted on a body similar in chemical composition to Earth.
第三：While some scientists speculate that shergottites derive from Io (a volcanically active moon of Jupiter), recent measurements suggest that since Io‘s surface is rich in sulfur and sodium, the chemical composition of its volcanic products would probably be unlike that of the shergottites.
第四：The only other logical source of shergottites is Mars.
看了四句話，還是有被略過的部分，首先簡單的先處理，主題句必看這我就不多贅述了，因為第二段開頭給到other，這意味著前面還有講到別的，這裡才會用其他來講，那他的主詞是source，所以找起源，因此我對應到的是第三句的shergottites derive from Io，所以這並列結構就抓出來了，再去核對主題句，所以可知道文章在討論到底Shergottites是什麼東東，然後文體表現就是百家爭鳴，各自有各自的看法。
還有一點，第二句是因為Shergottites再出來當一次主詞，以往都會變成代名詞出現，但這裡依舊再寫一次，表示他地位跟第一句的Shergottites一樣重要，所以要看，其他這被我畫掉的就不說了。
1. The passage provides information to answer which of the following questions?
(A) What is the precise age of the solar system?
(B) How did shergottites get their name?
(C) What are the chemical properties shared by shergottites and Martian soils?
(D) How volcanically active is the planet Jupiter?
(E) What is a major feature of the Martian surface?
解題：
這題我如果解題方式跟新Ｘ方一樣的話，他奶奶的，那我案貼上複製就好了，我幹媽浪費時間浪費電打字，把電腦留著挖比特幣還比較實在，所以庵必有想出新招來，才敢跟各位分享，聽我娓娓道來。提供的問題是可以回答出來的選項是哪一個，這就要探討『考試成本問題』了，當考試時間有限，意味著考生必須短時間知道考試再出啥題目，再來，出題的數目也有限，意味著出題老師只能往主旨挖題目，俗話說小而精啊，當然就是找精華考死你，所以，他絕對不是用排除法解題，也就是一個選項一個一個帶入文章，因為考生時間不夠，第二個老師沒辦法把精華雕出來會讓人覺得這老師真爛，所以解題方向絕不是排除法，如果真用排除法解題，等等還有下一題，如也用排除法搞的話，嘿嘿可能早就下課了。所以這一題來囉，綜合以上兩點，時間性以及出題性，可以大膽斷定題目一定是找一個可以解決主題句的結果出來，也就是說，Shergottites present scientists with a genuine enigma.如何解開謎題，再來根據結構圖看，解謎的方式就是一個一個猜，猶如哈希運算一個一個土炮帶入求解，剛剛提到比特幣突然閃過走神，好，拉回來。有人猜他是ＩＯ但是他是錯的，打岔一下，為何我鐵口直斷知道他是錯的，就是因為那個句內轉折，所以While some scientists speculate that shergottites derive from Io (a volcanically active moon of Jupiter),你根本不用看後面那又臭又長又不好懂的內容，不信你看到後面的would probably be unlike that of the shergottites.，哈哈還是看到了，不管拉反正他就是錯的，那結構圖上只剩下一個理論了，就是跟火星有關的，回看選項，也只能勉為其難地把（Ｅ）Martian surface給選起來了，選（Ｅ）
For the following question, consider each of the choices separately and select all that apply
2. It can be inferred from the passage that each of the following is a consideration in determining whether a particular planet is a possible source of shergottites that have been discovered on Earth
(A) strength of the planet‘s field of gravity
(B) proximity of the planet to its moons
(C) chemical composition of the planet‘s surface
解題：
這如果也是一個一個帶入，是可以拉，但時間啊老哥。所以老方法，看到推理題，請找什麼？沒錯，對比對象，哈哈感覺我好像人格分裂一樣，好拉那對比對象在哪？這裡a possible source of shergottites，然後剛剛是不是在結構圖上有個大ＸＸ，那個就表示他『不是』shergottites，『可能是VS. 絕不是』，所以找到對比對象了，因此看文章內容吧，再來我們平常是要對內容做取反或取同，正負變號，但是題目只問到determining whether，所以他不論正反只論是否有此條件因子。
recent measurements suggest that since Io‘s surface is rich in sulfur and sodium, the chemical composition of its volcanic products would probably be unlike that of the shergottites.
Moreover, any fragments dislodged from Io by interbody impact would be unlikely to escape the gravitational pull of Jupiter.
因為moreover所以我必須納入來看，他表示順向邏輯的遞進關係，這也剛好說明為何題目要出多選題，是為了跟大家說我的對應內容請找並列存在的『邏輯同向』內容。好拉那這樣題目也結解了，很確定是兩組而已，所以也很確定就那麼兩個答案，確定？確定！！恭喜答對了，選（A）(C)
我對用排除法的定義是：此解題方式荒唐到猶如拿張一千塊的小朋友貼在電腦螢幕上，並不停的對著滑鼠鼠標點擊複製貼上，奢求成為百萬富翁，哈哈其實不是我講的，是一位在『奇耙說』的演講者說的，有空可以看看這電視節目，對GRE的寫作還滿有用的。
本來可能半小時以上的解題時間，瞬間變成兩分鐘搞定，而且我根本不知道文章在啥內容，這才是考生需要的解題流暢感。
以上筆記供大夥參考若有錯誤再煩請指教
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