We go to the to buy clothes.[ ]
A. department store
B. park
C. theatre
答案:A
心电图示P波提前出现,其后有正常QRS波群,P波型态与窦性P波稍有差异,代偿间歇不完全,心电图诊断为()
A.房性早搏
B.室性早搏
C.房颤
D.室颤
E.结性早搏
如图所示,图标的含义是?()
A.增加选区
B.闭合选区
C.减去选区
D.新建选区