During the dock repair, when installing the tail shaft and propeller, _____ should be on the spot for supervising
A.chief engineer
B.engineer
C.captain
D.any member of the engine department

A.古典柱式
B.券拱结构
C.穹顶
D.骨架券

A.surveyor
B.chief
B.administrator
D.company

A.非洲草原气候、斯堪的纳维亚寒温带森林气候、印度尼西亚赤道雨林气候
B.中美洲草原气候、斯堪的纳维亚寒温带森林气候、美洲亚马逊热带雨林气候
C.澳洲沙漠气候、西伯利亚寒温带气候、太平洋岛国热带气候
D.非洲草原气候、日本温带森林气候、东南亚热带雨林气候