声波经听骨链传至前庭窗，声压可增加() ["A．1.3倍","B．2.3倍","C．3.3倍","D．4.3倍","E．5.3倍"]
前列腺液呈红色可见于一些什么情况?
预防新生儿呼吸窘迫综合征的措施有() ["A．防止早产","B．控制母孕期糖尿病","C．对于可能早产的孕母应用糖皮质激素","D．避免产科出血等并发症","E．减少窒息发生"]
阴道分泌物可以发现一些什么病原微生物?
呼吸窘迫的主要表现是() ["A．气促","B．发绀","C．口吐白沫","D．咳嗽","E．呼气性呻吟"]
前列腺液与精液有何关系?
