A.3 B.4 C.5 D.6
A.体重 B.腰围 C.皮褶厚度 D.胸围
A.年龄×7+50 B.年龄×7+70 C.年龄×5+50 D.年龄×5+70
A.5%~10% B.10%~15% C.15%~20% D.20%~25%