单项选择题
A.100mg/d B.150mg/d C.200mg/d D.250mg/d E.300mg/d
A.2~4周 B.5~8周 C.9~16周 D.17~24周 E.25~32周
A.1~3天内分泌的乳汁 B.1周内分泌的乳汁 C.2周内分泌的乳汁 D.4周内分泌的乳汁 E.3个月内分泌的乳汁