胎儿超声检查时机械指数应低于（     ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25746' and id < 2163632 and id<>'2163632' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25746' and id > 2163632 and id<>'2163632' order by id asc limit 5