采用McCabe度量法计算图4-15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 < 2441947 and id<>'2441947' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30131' and id > 2441947 and id<>'2441947' order by id asc limit 5