镍铬-镍硅热电偶灵敏度为0.044mV/°C,把它放在温度为1200℃处,若以指示仪表作为冷端,此处温度为50°C,则热电势大小(( )mV。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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