【单选题】在表面粗糙度评定参数中,能充分反映表面微观几何形状高度方面特性的是( )。
【单选题】Why are the bus tickets much cheaper than the train tickets?
A.
The bus trip takes longer time.
B.
The bus stops at several cities.
C.
Few people enjoy bus trip.
D.
There is no rest room in the bus.
【单选题】在表面粗糙度评定参数中,能充分反映表面微观几何形状高度方面特性的是
【单选题】在表面粗糙度评定参数中,能充分反映表面微观几何形状高度方面特性的是 。
【单选题】在表面粗糙度评定参数中,能充分反映表面微观几何形状高度方面特性的是 。
【单选题】According to this passage, holes were made in train tickets so as to______.
A.
show that the tickets were correct
B.
give a picture of the person who owned the ticket
C.
show how much the tickets cost
D.
record the details of a train robbery
【单选题】Prices of train tickets are always ______.