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【单选题】
a transformer with a variable ratio of K =10, from the low-voltage side for no-load test, the excitation impedance unit value of the secondary side is 16, then the excitation impedance unit value of the original side is ().
A.
16
B.
1600
C.
0.16
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参考解析:
刷刷题刷刷变学霸
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A.
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B.
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C.
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A.
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A.
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Bigger, less efficient;
C.
Smaller,less efficient;
D.
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【单选题】After the Opium War, which country got the right to build Kunming-Vietnam railway in Yunnan?
A.
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B.
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C.
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D.
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