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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【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.
【单选题】When the two transformers run in parallel, the load and short circuit impedance () are distributed.
A.
The magnitude is inversely proportional
B.
The scale is inversely proportional
C.
The scale is proportional to the value
【单选题】How old is the Stone Forest?
A.
50 million years old
B.
530 million years old
C.
270 million years old
D.
230 million years old
【判断题】A waist drum consists of drum clapper, drum head, drum ring, drum belt, drumstick and drum silk.
A.
正确
B.
错误
【单选题】A Y/y0-12 and a Y/y0-8 three-phase transformer with the same ratio, whether it can be run in parallel after modification ().
A.
can
B.
cannot
C.
not always
D.
It can be connected without changing
【多选题】What are the factors that resulted in the formation of the Stone Forest in Yunnan?
A.
the remains of dead corals
B.
the fossils of oceanic living beings
C.
The ancient sea slowly receded.
D.
the erosion from water and carbon dioxide