党在政治方向、政治路线、政治原则和方针、政策上的领导是( )。

A．政治领导

B．思想领导

C．组织领导

D．决策领导

It is required that ships proceeding at sea should keep continuous watch on（）.

A.VHF channels 16 and 13

B.Appropriate DSC distress and safety frequencies

C.INMARSAT TDM message channel

D.VHF channel 70 and channel 8