He didn't go home _______ he finished his homework. [ ]
A. when
B. if
C. until
D. that
答案:C
A.0.5s
B.1s
C.30s
D.60s
以工作为导向,将病人所需的护理活动按工作性质分配给固定人员的护理模式是责任制护理模式。()