枕先露指示点以____、面先露以____、臀先露以____、肩先露以____。
参考答案：枕骨；颏骨；骶骨；肩胛骨
She is in a poor of health, which worries her mother much.
A．position
B．situation
C．state
D．condition
最大许用操作压力的定义是？
