He _____ to school yesterday. [ ]
A. go
B. went
C. goes
D. going
答案:B
患者,男,45岁。心悸10天,心电图示多个导联提前出现的宽大畸形QRS波群,其前无相关P波,其后T波与QRS波群主波方向相反,代偿间歇完全。其诊断是()
A.房性早搏
B.房室交界性早搏
C.室性早搏
D.房室传导阻滞
E.室内传导阻滞
某方形基础,平面尺寸2.6m×2.6m,柱截面0.4m×0.4m,作用桩顶荷载Fk=850kN,Mk=10kN·m,基础混凝土强度等级C20,验算基础变阶处的冲切承载力是否满足设计要求。()
A.满足
B.不满足