持续性枕后位用胎头吸引器助产时,一般应将胎头向前旋转多少度方可以枕前位娩出()
A.30°
B.45°
C.60°
D.90°
E.135°
参考答案:D
_______ second hat doesn't fit me, either. Could I look at _______ third one?
A.A; a
B.The; the
C.A; the
D.The; a
镁过量临床表现______。
A.腹泻 B.房室性早博 C.房颤 D.贫血