未知题型 平行油液流过一块2m长的薄板，流速U0=4m/s，已知油液的运动黏滞系数ν=10-5m2/s，ρ=850kg/m3，试确定离板前端分别为0.5m、1.0m、1.5m处的壁面切应力τ0，并作比较。

单项选择题 ______ is where he gets all the money. A．That I cant understand B．What I cant understand C．What I can not understand it D．What can I understand

未知题型 针对肛隐窝炎湿热下注证者，宜用A.二妙丸合萆薜渗湿汤加减B.五神汤或龙胆泻肝汤加减###S