Although slavery was abolished as a result of the Civil War, the owners of plantations in the South made more profits from selling their agricultural products.
A.
正确
B.
错误
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【简答题】电流互感器按用途分为( )。 A 测量用电流互感器; B 保护用电流互感器 C 改变电压 D 改变功率A.B.C.D. D