单项选择题
A.2:1奶+辅食 B.3:1奶+辅食 C.4:1奶+辅食 D.5:1奶+辅食 E.全奶+辅食
A.1:1奶 B.2:1奶 C.3:1奶 D.4:1奶 E.全奶
A.60% B.50% C.70% D.65% E.55%