机械保养得作业内容有（）。
A、清洁、紧固
B、调整
C、润滑
D、防腐
参考答案：A, B, C, D
During the first 48 to 72 hours of fluid resuscitation therapy after a major burn injury, the intravenous infusion rate will be adjusted by evaluating which of the following observation
A．Daily body weight.
B．Hourly urine output.
C．Hourly urine specific gravity.
D．Hourly body temperature.
个别上前牙排列时需对人工牙减径的原因是（）
A．前牙覆过大
B．前牙覆盖过大
C．前牙覆正常
D．前牙缺隙稍宽
E．前牙缺隙稍窄
过大