个人客户证书介质遗失、损坏时,允许其办理证书冻结。
通讯写作表现手法的特点有()。 ["叙述的直接性","描写的直观性","议论抒情的实在性","对话的实录性"]
配网抢修指挥工作中省公司营销部主要职责是什么?
通讯按内容可以分为()。 ["人物通讯","事件通讯","工作通讯","风貌通讯"]
Burner ignition failure in an automatically fired auxiliary boiler would be caused by() ["a burned out solenoid in the oil supply valve","high temperature excess air","incorrectly setting the hot-well dump valve","an incorrectly positioned burner snubber realy"]
简述PVA的主要质量指标。