可能引发药物过敏的是（） ["Ⅰ型变态反应","Ⅱ型变态反应","Ⅲ型变态反应","Ⅳ型变态反应","药物毒性积蓄"]
压缩机运行时主油箱油位低于（）以下时应及时补加。 ["1/4","1/5","2/3","1/2"]
供货比率是物流企业满足（）的比例。 ["客户需求","目标客户的需求订货","少数客户所有订货","所有客户的所有订货"]
慢性湿疹可选用的药物剂型是（） ["硬膏","乳剂","软膏","溶液","针剂"]
冰雕的特点是（）。 ["观赏性强","操作难度大","操作时间要有适当的温度","操作时间长","操作时间短"]
安全周期是指（）
