脑肿瘤
A．均匀血性B．黄色C．乳白色混浊D．微绿色混浊E．毛玻璃混浊
参考答案：B
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
You see an iceberg that has not been reported. What kind of radio message do you transmit to warn others?（）.
A.Safety message
B.Urgency message
C.Distress message
D.Routine message
