采用McCabe度量法计算图4-18程序图的环路复杂性为（）。 

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30131' and id < 2441955 and id<>'2441955' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30131' and id > 2441955 and id<>'2441955' order by id asc limit 5