【名词&注释】
支气管(bronchial)、自我概念(self-concept)、细胞学检查(cytological examination)、基础代谢(basal metabolism)
[单选题]小儿的脑耗氧量,在基础代谢(basal metabolism)状态下占总耗氧量的
A. 20% B. 30% C. 40% D. 50% E. 60%