谜面:“零线进灯头,火线进开关”
拼音:líng,xiàn,jìn,dēng,tóu,huǒ,xiàn,jìn,kāi,guān
注音:ㄌㄧㄥˊㄒㄧㄢˋㄐㄧㄣˋㄉㄥㄊㄡˊㄏㄨㄛˇㄒㄧㄢˋㄐㄧㄣˋㄎㄞㄍㄨㄢ
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