不能作为超声造影剂微泡内气体散射回声源的是（     ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25745' and id < 2163605 and id<>'2163605' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25745' and id > 2163605 and id<>'2163605' order by id asc limit 5