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F = 1.8C + 32 (摄氏度到华氏度转换)。如果 \sigma_C = 5 °C， \sigma_F 是多少？
F = 1.8C + 32 (摄氏度到华氏度转换)。如果 \sigma_C = 5 °C， \sigma_F 是多少？
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