组合机床是一种按工件加工要求和加工过程设计和制造的专用机床。
参考答案:对
— ______ I visit Lucy on Sunday, Mum?
— Yes, you______. [ ]
A. Must; can
B. May; may
C. Need; need
D. May; need
A.10:3
B.3:10
C.3:10
D.10:3