【单选题】According to the principle of operation, navigation system can be divided into instrument navigation systems, , inertial navigation systems, astronomical navigation systems and integrated navigation ...
A.
Independent navigation systems
B.
Dependent navigation systems
C.
Short range navigation systems
D.
radio navigation systems
【单选题】Navigation details including soundings, nature of the bottom, navigational marks etc. are shown in ____
【多选题】某施工单位法定代表人授权市场合约部经理赵某参加某工程招标活动,这个行为属于 ( )
【单选题】某施工单位法定代表人授权市场合约部经理赵某参加某工程招标活动,这种行为属于( )。