一患儿误吸入一异物，出现呼吸困难，胸部X线片如图，可诊断为() ["A．总支气管异物","B．左支气管异物","C．右支气管异物","D．肺炎","E．以上都不是"]
肺灌注显像的机制()心肌灌注显像的机制()骨显像的机制() ["A．细胞选择性摄取","B．化学吸附作用","C．微血管栓塞","D．特异性结合","E．代谢通道"]
下列哪几项不是食管异物的并发症() ["A．食管穿孔","B．反流性食管炎","C．皮下气肿","D．主动脉弓破裂","E．气管食管瘘"]
气管、支气管异物最常见的是() ["A．植物类","B．动物类异物","C．金属类异物","D．化学类制品","E．内生性异物"]
流行性腮腺炎常见合并症为________、________、_____________。
心肌"冷区"显像()心肌"热区"显像()
