描述理想混悬液中沉降速度公式为 ()
A.Fiek定律
B.Poiseuile
C.Stokes
D.Noyes-Whitney
E.Arrhenius
参考答案:C
引导船舶以最佳航线航行于内河水道的过程,称内河引航。所谓最佳航线是指省时,快速及安全的线。
The electric fan has blown away the terrible smell in the hall,()?
A.can't it
B.isn't it
C.hasn't it
D.doesn't it