观察一组急性白血病患者的治疗效果,终点事件是缓解(完全缓解或部分缓解),则截尾定义为()。
A.缓解
B.未缓解
C.失访
D.死亡
E.B、C、D均是
参考答案:E
"The girl with whom I was talking just now is the president's daughter. " ______ me proudly. [ ]
A. Tommy told
B. told Tommy
C. did Tommy tell
D. Tommy said
伤寒、病毒性肝炎等患者应执行严密隔离。()