动力黏度的国际单位是( )。
A.N/m2 B.kg/m C.Pa·s D.m2/s
参考答案:C
解析:参看牛顿内摩擦定义
注意的两个最基本的特点是______。
A.指向和选择性
B.指向和集中性
C.紧张和集中性
D.紧张的选择性
__________ into consideration, they believed themselves more and returned to their positions.
A.Nothing to take
B.Everything taking
C.Nobody to be taken
D.Everything taken