AV指令不能查询()。 ["A、航班起飞时间","B、航班可利用座位情况","C、航班所设舱位等级","D、航班周期"]
中隔导联V3和V4的主波应为() ["正波","负波","正负相等","正相波为主","等电位"]
颈静脉孔血管部通过() ["舌咽神经","迷走神经","三叉神经","舌下神经","面神经"]
男,41岁,颈痛,发热,结合图像,最可能的诊断是()。 ["化脓性脊柱炎","脊柱转移瘤","椎体压缩骨折","脊椎结核","椎间盘突出"]
V1的QRS波群的特点() ["A.主要为正波","B.主要为负波","C.正负相等","D.与V6相同","E.以上均不是"]
ST