单选题In order to change the direction of rotation of a D-Cmotor （） (1) the field leads must be changed (2) the input leads must be changedA（1）onlyB（2）onlyCeither（1）or（2）Dneither（1）or（2）
单选题
In order to change the direction of rotation of a D-Cmotor （） (1) the field leads must be changed (2) the input leads must be changed
A
（1）only
B
（2）only
C
either（1）or（2）
D
neither（1）or（2）
参考解析
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