单项选择题
A.饼干 B.牙胶 C.咬咬乐 D.安抚奶嘴
A.2-4CM B.4-6CM C.6-8CM D.8-10CM
A.4-5 B.5-6 C.6-7 D.7-8
A.40%-60% B.42%-62% C.45%-65% D.48%-68%
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