______ the incorrect operation of the driver in the emergency, the terrible December 8th accident on the Chengzilu Freeway in Sichuan could have been avoided.

A．Apart from

B．Except for

C．Due to

D．But for

三度房室传导阻滞（）

A.同步直流电复律

B.非同步直流电除颤

C.体外反搏术

D.心室按需型起搏器

E.以上都不宜应用