人体生命活动产生的废物可以通过各种途径排到体外。下列生理活动

人体生命活动产生的废物可以通过各种途径排到体外。下列生理活动都属于人体排泄途径的是(   

①呼气  ②出汗  ③排便  ④排尿

A.①②④                               B.①②③

C.①③④                               D.②③④

答案

解析:人体排泄的途径有三条:呼气、出汗和排尿。

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