cAMP作为第二信使，在胞内最先激活（      ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25932' and id < 2179259 and id<>'2179259' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25932' and id > 2179259 and id<>'2179259' order by id asc limit 5