下列分散系不能发生丁达尔现象的是 

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21345' and id < 1851048 and id<>'1851048' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21345' and id > 1851048 and id<>'1851048' order by id asc limit 5