焦炉照明用电的电压是()。 ["A.220V","B.380V","C.24V"]
话务各种资料和记录应有(),保持资料完整和清洁。 ["A、负责","B、定期检查","C、专人保管","D、专人看管"]
当回收鼓风机停止运转,应立即()使集气管内压力降低。 ["A.拉开炉盖","B.拉开上升管盖","C.打开放散管"]
“你想见谁?”英文表示为:“()do you want to meet?” ["A、Whom","B、Whose","C、Which","D、What"]
K3是代表()。 ["A.推焦计划系数","B.推焦执行系数","C.推焦总系数"]
什么是人类困境?