总配电箱和开关箱至少设置()漏电保护。 ["A.一级 ","B.两级 ","C.三级 ","D.四级"]
下列银行卡中哪种不属于伪卡欺诈() ["伪造卡","变造卡","丢失卡","白卡欺诈"]
“油滑”
锚链的强度估算公式T=548.8d22,其中d表示()。 ["有档链环的内径(mm)","有档链环的外径(mm)","链环的本体直径(mm)","链环撑档直径(mm)"]
变配电室搭设必须采用防火材料,门必须朝向()开启。 ["A.随意 ","B.两边 ","C.内侧 ","D.外侧"]
灵活就业人员可以参加医疗保险吗?缴费比例是多少?