《素问·上古天真论》“筋骨坚,发长极,身体盛壮”所指女子的年龄段是()。
A."二七"
B."三七"
C."四七"
D."五七"
E."六七"
参考答案:C
Mary is old. [ ]
A. one and a half year
B. one and a half years
C. one and half year
D. one year and half