A: I'm sorry, but there's no direct flight ________ on Tuesday.B: What about Wednesday?
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A: What's your _________ for tomorrow?B: Tomorrow is Tuesday. I'm attending the sales meeting at 9:00 in the morning.
A: When are you_________ back?B: I'll take the 2:15 flight back on Sunday afternoon.
单选题1. 三相四线电能计量装置错误接线分析时,如果U12滞后于U32的角度为300°,则电压相序为( )。
A. 正相序
B. 逆相序
C. 零相序
多选题1.三相四线电能计量装置错误接线分析绘制相量图时,同一相的电压和电流相量符合( )。(多选)
A. 正相序
B. 随相原则
C. 角度正常情况