A.B/6+2.5cm B.B/6+2.7cm C.B/6+3cm D.B/6+2cm
A.B/5－2 B.B/5 C.B/5＋1 D.B/5－1
A.前后臀围尺寸相等 B.前臀围大于后臀围 C.后臀围大于前臀围 D.前三者都正确
A.2 B.3 C.4 D.5
A.8～9 B.10～12 C.14～16 D.16～18
