视网膜是由什么发育而成（） ["A．神经节细胞","B．中胚叶","C．表皮外胚叶","D．神经外胚叶","E．外胚叶的原纤维"]
石棉肺可见于()婴幼儿胸腺可见于()新生儿纵隔气肿可见于() ["A．胸膜斑","B．液弧线","C．船帆征","D．三角帆征","E．胸膜皱缩征"]
错构瘤可见于()矽肺可见于()肺泡微石症可见于() ["A．爆米花样钙化","B．分叶征、脐凹征","C．蝶翼征","D．伪足征","E．肺周边壳状钙化"]
关于剖宫产的适应证，错误的是() ["A．头盆不称","B．胎儿窘迫","C．部分性前置胎盘","D．初产妇，足先露，胎儿较大","E．达预产期胎头尚未入盆"]
左上叶肺不张典型征象是()右下叶肺不张典型征象是() ["A．薄饼征","B．右上三角征","C．平腰征","D．心后三角征","E．左上肺索条影"]
慢性支气管炎可出现()肺癌可出现()间质性肺水肿可出现()
