It seems ________ to our modern world, where everything is a rush and we try to cram as much into every minute as possible, but if not busy, we feel unproductive and lazy.

A．controversial

B．conventional

C．contemporary

D．contradictory

急性心肌梗死时最常见的心律失常是

A．心房颤动

B．室性早搏及室性心动过速

C．房室传导阻滞

D．预激综合征

E．非阵发性交界性心动过速