贯穿整个分娩过程中的分娩机转动作是
A．衔接
B．下降
C．俯屈
D．内旋转
E．外旋转
参考答案：B
进行自体骨髓移植时须考虑到（）
A.肿瘤必须未累及骨髓，移植前骨盆未经射线照射
B.肿瘤必须对放、化疗敏感
C.无抗肿瘤效应，故复发率极高
D.最好能进行体外骨髓净化
E.以上均是
The students in the class were _____ four groups before they started the game. [ ]
A. divided into
B. separated into
C. divided from
D. separated into
