拉脱法测定液体表面张力系数时 影响实验结果的主要因素有哪些？ What are the main factors that
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拉脱法测定液体表面张力系数时，影响实验结果的主要因素有哪些？ What are the main factors that affect the experimental results when the liquid surface tension coefficient is measured by pull-out method？
A．液体的温度变化 Temperature change of liquid
B．与液面接触金属框的水平度 Levelness of metal frame in contact with liquid surface
C．金属框的干净程度 Cleanliness of metal frames
D．砝码盘的水平度 Levelness of the weight plate
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ABC