【单选题】The Intrinsic distinction between the laminar flow and the turbulent flow is ( ) .
A.
velocity of turbulent flow is greater than that of laminar flow
B.
Re of laminar flow is less than that of turbulent
C.
larger cross-sectional area is turbulen t , while samller cross-sectional area is laminar.
D.
laminar flow without lateral mixing, while turbulent has lateral mixing.
【简答题】Peter (hand) a little box of chocolate to me.
【单选题】已知某条支路阻抗为Z=4-j3 (Ω),则该支路电流在相位上 ( )于该支路两端的电压。
【单选题】已知某条支路阻抗为 Z=5-j8 ( Ω ) ,则该支路电流在相位上 ( ) 于该支路两端的电压。
【多选题】销售顾问在交车当天所需要做的准备工作包括哪些内容?
D.
知销售经理、服务人员以及相关人员,告知参加交车仪式的时间,以及客户的信息