2016年10月30日GRE閱讀真題回憶
　　短文章：
　　For years, the leading theory for what caused the Younger Dryas (a dramatic reversal, about 12,900 years ago, in a global warming trend) was a release of water from Glacial Lake Agassiz. The theory posited that this meltwater flooded into the North Atlantic, lowering the salinity and intensity of surface waters enough to prevent them from sinking. Ocean currents were changed in such a way that northward transport of heat in the ocean diminished, and the North Atlantic regions plunged back into near-glacial conditions. However, evidence has emerged that the Younger Dryas began long before freshwater flooded the North Atlantic. Additionally, the temperature changes included by a shutdown in the North Atlantic heat conveyor system are too small to explain the Younger Dryas.
　　1.The author of the passage implies which of the following about the release of water from glacial Lake Agassiz?
　　A. The notion that the release occurred has been challenged by more recent findings.
　　B. The release probably occurred much earlier than scientists have generally assumed.
　　C. The release would not have been sufficient to cause any temperature change in the North Atlantic.
　　D. The timing of the release is such that it probably did not trigger the onset of the Younger Dryas.
　　E. The release was probably unrelated to the global warming trend that was taking place.
　　答案：選D.
　　解析：?jiǎn)栂旅婺膫�(gè)是作者暗示的和放水相關(guān)的.D說(shuō)放水時(shí)機(jī)是這樣的因此不可能帶來(lái)YD的開(kāi)始，完美符合選文中轉(zhuǎn)折后面放水YD之后的描述。A選項(xiàng)質(zhì)疑放水這件事的發(fā)生時(shí)原文沒(méi)提及的。B說(shuō)放水比科學(xué)家所普遍假設(shè)的要早，如果把科學(xué)家普遍假設(shè)和leading theory放在一個(gè)隊(duì)伍的話，他們之前認(rèn)為放水帶來(lái)YD，那他們肯定認(rèn)為放水要早咯，而實(shí)際YD要更早，那實(shí)際放水時(shí)間肯定比科學(xué)家假設(shè)的要晚。C選項(xiàng)錯(cuò)在any,太絕對(duì)了，沒(méi)說(shuō)放水一點(diǎn)溫度變化也不能帶來(lái)。E選項(xiàng)文章沒(méi)說(shuō)放水和全球變暖的關(guān)系。