In Sweden, people don’t need to _______ too much money on presents, instead, making a meal is enough.

A．spend

B．take

C．pay

D．cost

房间隔缺损，使症状加重的心律失常为（）

A.室早

B.房早

C.房室传导阻滞

D.房颤

E.窦性心动过速