单项选择题

当短路点电气距离很远时,可按三相短路电流乘以系数来估算两相短电流,这个系数是下列哪项值?(  )
电气工程师发输变电专业,历年真题,2020年注册电气工程师(发输变电)《专业知识考试(下)》真题

A.见图A
B.见图B
C.见图C
D.见图D
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Section A Dialogue CompletionDirections: In this section, you will read 5 short incomplete dialogues between two speakers, each followed by four choices marked A, B, C, and D.Choose the answer that best suits the situation to complete the dialoguE.Mark your answer on the ANSWER SHEET with a single line through the center.Speaker A: Here's a gift for you. I bought it in ChinA.Speaker B: ______A.How much did it cost?B.Wow, it is great! Thank you.C.It must be very expensivE.D.Sorry to have bothered you.
A.Speaker
B.
Speaker
C.How
D.Wow,
E.
C.It
F.
D.Sorry
G.
单项选择题
当系统最高电压有效值为Um时,相对地的工频过电压和操作过电压的基准电压(1.0p.u.)分别为( )。
A.见图A
B.见图B
C.见图C
D.见图D
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