从第一张幻灯片开始放映幻灯片的快捷键是 （ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29841' and id < 2421876 and id<>'2421876' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29841' and id > 2421876 and id<>'2421876' order by id asc limit 5