单选题The GMDSS is a world-wide communication network combining（）with（）.Asatellite /terrestrial systemBINMAARSAT/COSPAS-SARSATCSART / EPIRBDgeostationary/polar-orbiting satellites
单选题
The GMDSS is a world-wide communication network combining（）with（）.
A
satellite /terrestrial system
B
INMAARSAT/COSPAS-SARSAT
C
SART / EPIRB
D
geostationary/polar-orbiting satellites
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