单项选择题
(A)灭火战斗 (B)训练 (C)供水 (D)破拆
(A)30mm (B)40mm (C)50mm (D)60mm
(A)10m (B)15m (C)17m (D)22m
(A)15m (B)17m (C)22m (D)27m
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