i5M8.3智能多轴立式加工中心液压站用途是什么？
参考答案：i5M8.3智能多轴立式加工中心液压站用途是主轴松卡刀、AC轴抱闸。
It was not until he came back _____ he knew the police were looking for him.
A．which
B．since
C．that
D．before
《金匮要略》论历节病的成因是（）
A.外感风寒湿之气
B.肝肾亏虚，筋骨失养
C.肝肾亏虚，风寒湿侵
D.肝肾不足，寒伤骨髓
E.阳气亏虚，血行不利
