速度v、长度L、运动粘度ν的无量纲组合是()
A.vL/ν
B.νL/v
C.νv/L
D.V/νL
参考答案:A
As it was almost time for the flight, all the passengers got ______ the plane.
A.board
B.abroad
C.aboard
D.broad
《我是猫》的作者是?()
A、森鸥外
B、村上春树
C、小林多喜二
D、夏目漱石