心肌保护液的灌注途径有：（）
A．升主动脉顺行灌注
B．冠状静脉窦逆行灌注
C．右房逆行灌注
D．经血管桥灌注
参考答案：A,B,C,D
Communication along with information industry _____ an important part in modern times.[ ]
A. play
B. plays
C. have played
D. are playing
