单项选择题
A.1盏 B.2盏 C.3盏 D.4盏
A.2m B.3m C.4m D.5m
A.1~1.5m B.2~2.5m C.3~3.5m D.0~1m
A.1m B.1.5m C.2m D.2.5m
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