I like living in the house _____ is big and bright. [ ]
A. that
B. who
C. how
D. where
答案:A
男性,56岁,近日来感心悸,乏力,头晕,心电图示P-R间期在相继的心动周期中逐渐延长,最后发生QRS波群脱漏,如此周而复始。最可能是( )
A.Ⅱ度Ⅱ型房室传导阻滞B.Ⅱ度Ⅰ型房室传导阻滞C.心房颤动D.Ⅰ度房室传导阻滞E.Ⅲ度房室传导阻滞