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【单选题】
保持正确的工作姿势,以下哪个是最佳说法
A.
工作间歇适当变换体位或姿势,缓解肌肉、关节疲劳,减轻脊柱负荷;尽可能抬高下肢或锻炼下肢,促进血液回流;
B.
站立时,双下肢轮流支撑身体重量,适当做踮脚动作,促进小腿肌肉的收缩及静脉血回流;
C.
站立或坐位时,保持腰椎伸直,使脊柱支撑力增大,避免过度弯曲造成腰部韧带劳损;
D.
弯腰搬重物时,伸直腰部,双脚分开,屈髋下蹲,后髋及膝关节用力,挺身搬起重物;
E.
以上都正确;
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】以下哪个不是文化的一般特征（）。
A.
文化是由人类进化过程中衍生出来或创造出来的。
B.
文化是后天习得的。
C.
文化是一个连续不断的过程。
D.
只有经过人类有意无意加工制作出来的东西才是文化。
【单选题】最佳修复方案是
A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...
A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.
【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判) decisions that denied victory to their team. A researcher was appointed to study the performance...
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match