病态窦房结综合征的理想治疗方法是
A．静注阿托品B．静滴异丙肾上腺素C．同步电复律D．安装永久性心脏起搏器E．滴麻黄素
参考答案：D
The best way __________ the work is to start at once.[ ]
A. finish
B. to finish
C. finishing
D. finishes
赘生物常位于血流从低压腔经病变瓣口或先天缺损至高压腔的下游
