光功率计可用来测量（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30265' and id < 2448379 and id<>'2448379' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30265' and id > 2448379 and id<>'2448379' order by id asc limit 5