A.各港港務(wù)監(jiān)督 B.各港港航監(jiān)督 C.國(guó)家港務(wù)監(jiān)督局 D.國(guó)家港務(wù)監(jiān)督局批準(zhǔn)的港務(wù)監(jiān)督
A.12 B.1.2 C.24 D.2.4
A.12 B.15 C.30 D.60