按()的不同,轴可分为转轴、传动轴和心轴。
A.承受荷载
B.轴的材料
C.轴线的形状
D.轴的设计
参考答案:A
When the dispute over duty payment arises between the duty payer and the Customs, the duty payer should first pay the duty and then, within () of the issuance of the duty memo, apply to the Customs in writing for a reconsideration of the case.
A. 10 days
B. 20 days
C. 30 days
D. one year
俗称的10米业余波段的频率范围以及业余业务和卫星业余业务的使用状态分别为:()
A.28-29.7MHz,专用
B.28-29.7MHz,主要业务
C.28-29.6MHz,专用
D.28-30MHz,次要业务