十字滑块联轴器,它的中间盘是()的装在两筒之间。
参考答案:浮动
三级预防()
A.减少各种病损的发生
B.防止残疾转化为残障
C.早期发现、早期治疗
D.预防各种致残因素
E.康复医疗
In a given month, Friday is the 21st day of the month. What day of the week was the 5th of the month? ()
A.Monday
B.Thursday
C.Saturday
D.Wednesday