下列选项中，对组胺H2受体具有阻断作用的药物是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29629' and id < 2407403 and id<>'2407403' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29629' and id > 2407403 and id<>'2407403' order by id asc limit 5