混合动力车的缩写为() ["GDI","VVT","EV","HEV"]
罐特殊操作不包括()。 ["化验分析","交库","退库","盘点"]
更换阀门前准备工作主要有()。 ["切断上下游压力源","泄压","加装盲板","上锁挂签","只关闭上源阀门","只关闭下源阀门"]
2014年,国家对出租车达到60万公里必须报废,现有一辆运行一年的出租车,其里程表达到15万公里。这俩车现在的成新率时多少() ["0.875","0.93","0.75","0.6"]
罐倒罐操作,在哪边建立关系?() ["收方","付方","可配,但某一时刻只能一方建立","没有限制"]
试分析氧纯度下降的原因,并如何处理?