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【单选题】
感性电路中,电压电流为关联参考方向,则电压电流的相位关系为 。A.
电压比电流超前
B.
电压比电流滞后
C.
电压和电流同相
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【单选题】He arrived home just in time to ______ his brother being taken away by the police.
A.
look
B.
attempt
C.
witness
D.
watch
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