()的优点在于可以处理各种各样的计价情况,缺点在于数据量大,维护相对困难。
A.列车图定编组表
B.票种上浮率表
C.季节浮动表
D.特殊票价表
参考答案:D
当采用平头普通平键时,轴上的键槽是用端铣刀加工出的。( )
— Could you tell me now, Mary?
— A magazine about science.
A.what are you reading
B.what you are reading
C.what were you reading
D.what you were reading