体内肺表面活性物质减少可导致() ["A．肺泡回缩力减少","B．肺泡稳定性增加","C．肺泡表面张力减少","D．肺泡顺应性降低","E．肺泡毛细血管血浆外渗减少"]
试述法洛四联症的临床表现特点及其原因?
溶血性黄疸患者胆色素代谢特点是() ["A．血清中非酯型胆红素浓度明显增高","B．血清中酯型胆红素浓度明显增高","C．进入肠内酯型胆红素减少","D．尿中尿胆原显著减少","E．尿中尿胆红素明显增多"]
试述动脉导管未闭的心电图特点?
休克患者缺血性缺氧期微循环灌流的特点是() ["A．少灌少流，灌多于流","B．少灌少流，灌少于流","C．多灌多流，灌多于流","D．少灌多流，灌少于流","E．多灌少流，灌多于流"]
简述法洛四联症的X线特点?
