单项选择题
A.14个扬声器带低音炮 B.12个扬声器带低音炮 C.10个扬声器带低音炮 D.8个扬声器带低音炮
A.380N•m B.385N•m C.390N•m D.400N•m
A.150KW B.160KW C.170KW D.180KW