旅行社与旅游者签订合同应就下列内容明确约定(　　)。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='50924' and id < 3256053 and id<>'3256053' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='50924' and id > 3256053 and id<>'3256053' order by id asc limit 5