门诊手术麻醉前注意事项哪项是错误的()。
A.成人应自术前午夜后禁食
B.禁食包括清饮料和水
C.术后必须留麻醉后恢复室观察
D.离院时必须有成人陪伴
E.以上都不是
参考答案:E
采用随机,对照,双盲,试验研究方法的文献属于()
A.五级
B.四级
C.三级
D.二级
E.一级
Since it was so difficult for American Indians to negotiate a peace treaty or declare war in their native language, they used a universal understood form of sign language.