风湿性心瓣膜病二尖瓣狭窄患者,如闻及开瓣音,表示其病理改变为()
A.瓣膜明显增厚
B.漏斗型
C.隔膜型
D.二尖瓣狭窄伴关闭不全
E.联合瓣膜病变
参考答案:C
免疫浊度试验时,防止高剂量钩状效应的发生,应确保反应体系中
A.抗体过量
B.抗原过量
C.抗体为H型
D.必须含有增浊剂
E.无特殊要求
He was ________and died of lung cancer at an early age.
A.addicted to smoke
B.addictive to smoke
C.addicted to smoking
D.addictive to smoking