涂膜的划格试验可以看作是测定附着力的一种方法。( )
参考答案:对
In a sports team each player has a clear role, and there are few __________ when members are
uncertain of their roles. [ ]
A. occasions
B. positions
C. chances
D. situations
皮带机开车顺序:3#皮带机—2#皮带机—引风机—振动筛—1#皮带机—给料机。