一般不用()法测量往复式压缩机轴承顶间隙。 ["A、抬轴","B、塞尺","C、打表","D、压铅"]
何谓承运?
单注中奖奖金超过()元需缴纳偶然所得税 ["A、3000","B、5000","C、10000","D、20000"]
下列第()种情况不具备产生电弧的条件: ["工具引起的意外短路","更换刀式熔断器时","手动开闭头罩开闭机构","使用不正确的测量仪器"]
机组润滑油在到达机组前要经过()设备。 ["主油泵","油冷器","油过滤器","油加热器"]
车站货场内连续备货连续装车的整车大宗货物的暂存费核收有何规定?