下列物质中，不能被水解的生物分子是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21839' and id < 1908016 and id<>'1908016' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21839' and id > 1908016 and id<>'1908016' order by id asc limit 5