单项选择题
(A)200L/S (B)300L/S (C)400L/S (D)500L/S
(A)800L (B)1000L (C)1200L (D)1500L
(A)7t (B)6t (C)5t (D)4t
(A)55mm (B)65mm (C)70mm (D)75mm
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