66. DSC distress alert should direct to（ ）ln vicinity。 A: all stations B: coast stations C: ship stations nearby D: group of specified stations

Public television stations are different form commercial stations _____.

143. Details of Coast Radio Station and Radar Stations and Read Stations can found in （ ）

Which stations are mentioned in the video clip?

The chief reason for building space stations was to ______.

（ ）are utilized to relay Enhanced Group Calls A: COSPAS satellites. B: HF SITOR shore stations C: NAVTEX shore stations D: Inmarsat satellites.

What should be made known in the lists of coast and ship stations? A: the services of the stations open to public correspondence B: the information on charging C: what kind of the public correspondence D: A and B

Many power stations have been modernized to less pollution.

stations to pass on signals是蜂窝式无线电通讯系统的

34. Cospas-Sarsat comprises a several near polar orbiting satellites and一． A: a network of land based earth stations B: several coast stations C: an earth station D: some RCCs