临产后进人第二产程的主要标志是
A．外阴膨隆
B．胎头披露
C．胎头着冠
D．肛门括约肌松弛
E．宫口开大10cm
参考答案：E
--Why didn’t you tell Ann the truth?
--______ .
A．Yes, I was afraid to be scolded by her
B．No, but I wanted to
C．But I did
D．I always hate telling lies
中线属于（）场。
