单项选择题

为减小热电偶测温时的测量误差,需要进行温度补偿,下列补偿方法中,不能用于热电偶的是( )。 A.
补偿导线法 B.
电桥补偿法 C.
冷端恒温法 D.
差动放大法

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Byimproving the electric light bulb, Thomas Edison made it possible for homes or individual houses to be electrified at a time when almost everybody was _________, since electric light was also a much safer form of illumination than gas or candles or oil lamps.

A．using kerosene
B．using coal
C．using gas
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