与CD-ROM相比，DVD使用波长更短的红色激光，可读取更小的凹坑和更密的光道。（  ）  

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69451' and id < 4497737 and id<>'4497737' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69451' and id > 4497737 and id<>'4497737' order by id asc limit 5