上肢前臂或手出血应用止血带止血时，应缚在（）
A.上臂上1/3
B.上臂中上1/3
C.上臂中1/3
D.上臂中下1/3
E.上臂下1/3
参考答案：A
Once he has determined ________ something, no one can change his mind.[ ]
A. to do
B. doing
C. to have done
D. having done
简述政府公共关系的六种活动模式。
