C6神经根受压时选择颈椎牵引的最佳角度是须前屈A．0°中立位 B．0°～10° C．

The party last night was _______ success. We sang and danced until it came to _______ end at 12:00.

A．a; an

B．a; the

C．the; an

D．/; an

法的主要特征表现为（）

A.社会的共同性

B.强制性

C.倡议性

D.公正性

E.稳定性

Emergency restraints or seclusion may be implemented without a physician's order under which of the following conditions

A．When a written order will be obtained from the primary physician within 1 hour.

B．If a voluntary client wants to leave against medical advice.

C．When a minor child is out of control.

D．Never.

造成地面水和地下水污染的最主要来源属（）污染。