在眼眶异物中，下列哪种属磁性异物() ["A．不锈钢","B．铜","C．铅","D．铝","E．铁屑"]
新生儿呼吸窘迫综合征的病因是()湿肺的病因是()膈疝患儿呼吸窘迫的病因是() ["A．肺表面活性物质缺乏","B．肺出血","C．肺发育不良","D．肺液吸收障碍","E．持续肺动脉高压"]
儿童及青少年患者长期应用抗癫痫药苯妥英钠，其容易发生的副 ["A．嗜睡","B．齿龈增生","C．心动过速","D．过敏","E．记忆力减退"]
最常见的"颞下窝原发肿瘤"为() ["A．鼻咽癌","B．腮腺肿瘤","C．脑膜瘤","D．肉瘤或未分化癌","E．淋巴瘤"]
早产儿多见，生后6小时内出现呼吸困难()差异性紫绀()胎儿缺氧所致() ["A．NRDS","B．MAS","C．PPHN","D．湿肺","E．GBS感染"]
降低肺动脉压力()关闭动脉导管()开放动脉导管()
