题目：
中性线又称零线，是指（）。
A.从电源绕组始端（首端）引出的导线
B.连接接地点的导线
C.从中性点引出的导线
D.从外壳引出的导线
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
中性线又称零线，是指（）。A.从电源绕组始端（首端）引出的导线 B.连接接地点的导线
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