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【单选题】
Single-phase transformer determination of the original and vice polarity, if the first end is the same end, there is ().
A.
;
;B.
;
;C.
。
。举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【判断题】Ansai Waist Drum can be divided into “literature” and “military” performance styles.
A.
正确
B.
错误
【单选题】Which word is the synonym of "limestone" ?
A.
wonder
B.
geologist
C.
geology
D.
Karst
【单选题】Three-phase transformer connection group is Y, D5, where "5" represents ().
A.
lagging
lagging
B.
lagging
lagging
C.
leading
leading
D.
leading
leading
【单选题】How big is the Stone Forest region?
A.
13 square kilometers
B.
78 square kilometers
C.
13 square kilometers
D.
350 square kilometers
【单选题】The Stone Forest County is an autonomous county of ______.
A.
Bai people
B.
Yi People
C.
Dai People
D.
Naxi People
【单选题】Transformers with different connection groups cannot operate in parallel because ().
A.
Voltage change rate is too large;
B.
The no-load circulation is too large;
C.
The excitation current at load is too large;
D.
The transformer ratio is different with different connection group numbers.
【单选题】How famous is the Stone Forest in the world?
A.
It is a natural miracle.
B.
It is a nature reserve.
C.
It is the word natural heritage
D.
It is a geological scenic spot.