现代照相机的机内测光一般依据的基准反光率为（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30138' and id < 2438403 and id<>'2438403' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30138' and id > 2438403 and id<>'2438403' order by id asc limit 5