分析详解27 reading 2TPO 27阅读.pdf
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TheFormationofVolcanicIslands
Earth’ssurfaceisnotmadeupofasinglesheetofrockthatformsacrustbut
ratheranumberof“tectonicplates”thatfitclosely,likethepiecesofagiantjigsaw
puzzle.Someplatescarryislandsorcontinents,other
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