单项选择题
A.16mm2 B.20mm2 C.25mm2 D.35mm2
A.0.5~0.9m B.1m C.1~1.5m D.2~3m
A.100℃ B.110℃ C.120℃ D.130℃
A.1m B.2m C.2.5m D.3m
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