单项选择题
A.剖方定位工序 B.切片工序 C.清洗工序 D.烘干工序
A.90.0t/a B.45.0t/a C.36.0t/a D.18.0t/a
A.81dB(A) B.78dB(A) C.71dB(A) D.68dB(A)