[名词解释] 麻疹黏膜斑

慢性肺源性心脏病右心衰竭时，最可能降低的是（） ["血尿素氮","血清胆红素","血清钠","血清葡萄糖","血乳酸"] 铅线 正常成人的QRS波群时限多为（） ["0.04～0.08s","0.04～0.10s","0.06～0.10s","0.08～0.10s","0.08～0.12s"] 蜘蛛痣 不符合肺源性心脏病体征的是（） ["肝颈静脉回流征阳性","心脏浊音界向左下扩大","颈静脉怒张","剑突下示心脏搏动","肺动脉瓣区第二心音亢进"] 麻疹黏膜斑