有效声束宽度影响到系统成像的（     ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25727' and id < 2162940 and id<>'2162940' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25727' and id > 2162940 and id<>'2162940' order by id asc limit 5