单期储蓄国债个人累计认购金额上限是（）。 ["100万","1000万","300万","500万"]
项目的（）特点，使项目控制有别于其他管理控制。 ["高质量","连续性","计划性","一次性"]
Under tropical conditions, control valves have fully opened, but the room still hot.What measures can be taken in such a case?（） ["Keep the plant running all time","Start another blower","Increase the ratio of circulated to fresh air","Reduce the seawater flow to the condenser"]
我国一般在签字厅内设置的签字桌是（）。 ["长方桌","椭圆桌","圆桌","方桌"]
什么叫负序电流滤过器？
什么叫复合电流滤过器？
