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【简答题】
一个不对称三相电压源，线电压为V ab =600∠36.87°，V bc =800∠126.87°，V ca =1000∠-90°。三相 形负载连接到电压源，负载每相电阻为37Ω。试求 (1)电压的对称分量 (2)相电压 (3)线电流
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皮皮学刷刷变学霸
举一反三
【单选题】When and where to build the new factory ______ yet.
A.
has not decided
B.
are not decided
C.
is not deciding
D.
has not been decided
【单选题】________ for a whole night, we still couldn't agree on when to start and where to go for the holiday.
A.
Discussed
B.
Having discussed
C.
Discussing
D.
Being discussed
【单选题】S型分油机在时序控制期间,当时序进行到Ti72置换时,EPC-50控制器发出的指令是
A.
电磁阀SV4断电,SV10断电
B.
电磁阀SV4通电,SV10断电
C.
电磁阀SV4断电,SV10保持通电
D.
电磁阀SV4通电,SV10保持通电
【单选题】Professor James will give us a lecture on the Western culture, but when and where ____ yet.
A.
hasn’t been decided
B.
haven’t decided
C.
isn’t being decided
D.
aren’t decided
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