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F2_科學_8.6_家居用電
F2_科學_8.5_電路
F2_科學_8.4_電阻
F2_科學_8.3_電壓
F2_科學_8.2_電流
F2_Science_8.6_household electricity
F2_Science_8.5_electrical circuits
F2_Science_8.4_resistance
F2_Science_8.3_voltage
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