厚层软土地区的抗震设防烈度为()度,宣判别其软土震陷的可能性。() ["≥6度","≥7度","≥8度","≥9度"]
食用河豚鱼发生食物中毒的原因是() ["河豚鱼含有的组胺","河豚鱼含有的毒素","河豚鱼中有毒金属","河豚鱼腐败变质","河豚鱼受到有毒物质污染"]
河豚鱼中河豚毒素含量最高的器官是() ["眼睛","肾脏","卵巢","皮肤","血液"]
对于桩基和基础埋深大于5m的天然地基,地震液化判别深度应在地面以下()m的范围内。() ["15","20","25","30"]
库存控制管理的定量订货法中,关键的决策变量是:() ["需求速率","订货提前期","订货周期","订货点和订货量"]
一台SFP-90000/220变压器,额定容量9000kVA,额定电压为220+2*2.5%/110kV,问高、低压侧额定电流是多少?