It can be inferred from the passage that preci
问题详情
It can be inferred from the passage that precipitation formed from evaporated ocean water has______
A．the same isotopic ratio as ocean water
B．less oxygen 18 than does ocean water
C．less oxygen 18 than has the ice contained in continental ice sheets
D．a different isotopic composition than has precipitation formed from water on land
E．more oxygen 16 than has precipitation formed from fresh water请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：Bisthebestanswer.Lines23-27statethatwhenwaterevaporatesfromtheoceansurface,oxygen18,aheavierisotopethanoxygen16,tendstobeleftbehindintheremainingoceanwater.Thus,onecaninferthatevaporatedoceanwaterwouldcontainlessoxygen18thanwouldtheremainingoceanwater.Aisincorrectbecauseitcontractsinformationstatedinlines19-27.Cisincorrectbecausethepassagesuggeststhatthewaterevaporatedfromtheoceancontributestothegrowthofcontinentalicesheets,whichshouldthereforehaveanisotopiccompositionsimilartothatoftheprecipitationformedfromevaporatedoceanwater.DandEdescribeinformationthatcannotbeinferredfromthepassage.
