正常成人心率范围为() ["A.50~80/min","B.60~90/min","C.60~100/min","D.70—80/min","E.70~90/min"]
有关心率的叙述,下列哪项是正确的() ["A.正常成人心率范围为60~90/min","B.检查心率以听诊器在心尖部听取第一心音计数","C.女性心率稍慢","D.老年人心率稍快","E.婴幼儿心率超过150/min,称心动过速"]
通常能听到几个心音() ["A.1个","B.2个","C.3个","D.4个","E.5个"]
心尖部触及舒张期震颤,最常见于() ["A.室间隔缺损","B.动脉导管未闭","C.二尖瓣狭窄","D.主动脉瓣狭窄","E.肺动脉瓣狭窄"]
打破芽和种子休眠的是()。
促进瓜类植物多开雌花的是()。