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【简答题】
电路如图所示，电压与电流采用关联参考方向，已知u 1 =10V，u 2 =5V，u 4 =-3V，u 6 =2V，U 7 =-3V，u 12 =8V。试求出尽可能多的电压。如需确定所有电压，尚需给定哪些电压?
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A.
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B.
have a strong demand for balance when they are speaking
C.
always have an instinct to imitate the people they are talking to
D.
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A.
blame
B.
charge
C.
accuse
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trial
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A.
popularity
B.
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