【多选题】关于口腔修复学的发展趋势,以下正确的是( )
【单选题】Close the windows, so the dirt from the road won't come into the car.
A.
If the windows are open, the car won't stay clean.
B.
With the windows open, it will be too windy in the car.
C.
With the windows open, there will be too much noise from the traffic on the road.
【单选题】长度比尺λ L =50的船舶模型,在水池中以1m/s的速度牵引前进,测得波浪阻力为0.02N,则原型中需要的功率N P 为( )kW。
【简答题】This tie is ____________ , so 1'11 take it to the cleaner's. (dirt)
【单选题】长度比λL=50的船舶模型,在水池中以1m/s的速度牵引前进时,则得波浪阻力为0.02N。原型中需要的阻力( )
【单选题】ground-in dirt 的意思是______.
A.
dirt which is ground in the fingernails
B.
dirt which is grounded in the fingernails
C.
dirt which is grinded in the fingernails
【单选题】长度比尺 λ L =50的船舶模型,在水池中以1m/s的速度牵引前进,测得波浪阻力为0.02N,则原型中需要的功率 N p 为: