GRE考試高分沖刺練習試題及答案
Thediscovery of subsurface life on Earth, surviving independently from surfacelife, refuted the belief that biological processes require not only liquidwater but sunlight as well, thus greatly enhancing the possibility of lifebeyond Earth. Take Jupiter’s moonEuropa. Space probes show a body covered with a thick layer of ice. AsEuropa orbits its planet, however, it flexes due to the gravitationaltug-of-war between it, its sister moons, and Jupiter. Through friction, thisflexing produces heat in the moon’s interior capable of melting ice. Indeed,observations suggest liquid water exists beneath Europa’s icy crust.Photosynthetic life is impossible there because sunlight is completely absent,but life such as the microbes that flourish deep within earth may still bepossible.
The highlighted sentence “take Jupiter’s moon Europa” serves tointroduce
A. aninstance that allows a hypothesis to be tested
B. speculationgrounded in empirical discovery
C. a deductionfrom a newly advanced hypothesis
D. alarge-scale effect of an apparently insignificant contingency
E. thederivation of a contradiction to refute a claim
解析
閱讀思考呀!注意段落結(jié)構(gòu)和作者思路呀!
答案：B
解析：為什么是B不是A呢?為什么呢?為什么呢?
要看文章結(jié)構(gòu)呀!文章首先說地球上的一個重要發(fā)現(xiàn)，接著說該發(fā)現(xiàn)提高了天外星體存在生命的'可能性。然后就是這句高亮句：take Jupiter’s moon Europa。這確實是一個例子，但后文對其描述用的是“may still bepossible”這樣的文字。所以B選項speculation ，結(jié)合前文的empirical discovery是對其更準確的概括。A選項to be tested 原文是沒有依據(jù)的。
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