图为我国新疆天山南麓某区域，据图判断图中河流最主要的补给来源

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19991' and id < 1733103 and id<>'1733103' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19991' and id > 1733103 and id<>'1733103' order by id asc limit 5