对心脏骤停患者进行心肺复苏的有关说法正常的是

A．心肺复苏降低了冠状动脉旁路需要

B．心肺复苏迫使室颤变为正常节律

C．心肺复苏对生还无效

D．迅速的心肺复苏为心脏提供了富含氧的血流为除颤争取了时间

E．心肺复苏降低了心肌耗氧量

— ______ you called yesterday evening?

— My sister. Why? [ ]

A. Who it is that

B. Who is it that

C. Who was it that

D. Who it was that