题目内容
（请给出正确答案）
[多选题]
The protection switching status of the clock source in the PTN equipment includes？（)
A.Manual switching
B.Forced switching
C.Clear
D.Rehearsal switching
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题目内容
（请给出正确答案）
如果结果不匹配，请 联系老师 获取答案
题目内容
（请给出正确答案）
A.Manual switching
B.Forced switching
C.Clear
D.Rehearsal switching
如果结果不匹配，请 联系老师 获取答案
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