光信号在光纤中传输产生（）会导致信号畸变。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28907' and id < 2354680 and id<>'2354680' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28907' and id > 2354680 and id<>'2354680' order by id asc limit 5