【多选题】工作人员不准在SF6设备防爆膜附近停留。若在巡视中发现异常情况,应()。
【简答题】He is not much of a talker; a ______ sentence for him is "Urn", his standard reply to most questions. (long)
【单选题】When he was asked how many letters he received yesterday, his reply was_______.
【简答题】下列关于行政行为的效力说法错误的是( )。