题目内容
（请给出正确答案）
At what temperature does the superconducting ceramic lose its resistance？
A．143 degree Celsius．
B．263 degree Celsius．
C．As long as it is ice-cold．
D．Absolute zero．
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At what temperature does the super conducting ceramic lose its resistance？
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B．- 263 degree Celsius.
C．As long as it is ice-cold.
D．Absolute zero.
