【单选题】在中性点直接接地系统中,发生接地故障时,零序电压最高点是( )。
【单选题】----______ you ever ________ Tom before ? ---- No, I _____ him just two minutes ago.
B.
Have, known ; have met
【单选题】--I have met Tom several times before. --________.
【单选题】I met Tom yesterday. I_____ him since we left school. [ ]
【单选题】— You have never met a famous film star, ________? — Yes, I have. I met Maggie Zhang last year. [ ]
【简答题】’--- I have met Tom several times before.--- ___A. So did I B. I did,either C. So have I D. Neither have I
【单选题】Have you met Tom recently?