轧制压力是轧件变形时金属作用于轧辊上的压力。

We should let more young parents and their children can enjoy scientific early education .

A．provide more young parents and their children to enjoy early education

B．provide more young parents and their children to enjoy early education and scientific

C．provide young parents and their children enjoy more scientific early education

D．provide young parents and their children with more early education services

根据我国现行规定，施工企业从事多种经营而不分别核算或不能准确核算的，则（）。

A．合并征收增值税和营业税

B．区别不同情况征收增值税或营业税

C．一并征收增值税而不征收营业税

D．一并征收营业税而不征收增值税

在DLX指令实现的简单数据通路中，IF是指取指令周期，ID指（）、EX指（）、WB指写回周期。

分析交流接触器出现吸力不足的故障原因。

CRH1A型动车组IDU的系统--制动界面上，停放制动状态指示信息显示区域显示绿色边框，表示（）。

A.停放制动实施

B.停放制动缓解

C.停放制动故障

D.状态不明