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單項(xiàng)選擇題

（）is a space system using one or more artificial earth satellites.

A.Satellite network
B.Satellite link
C.GMDSS
D.Satellite system

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單項(xiàng)選擇題

For ships equipped with an SES, it is（）and（）for the operator to send a distress alert.

A.easy/reliable
B.difficult/cheap
C.stable/compulsory
D.easy/expensive

單項(xiàng)選擇題

In the COSPAS-SARSAT system distress signals are processed by（）and the resulting data are forwarded to（）through（）communication network.

A.MCC/LUT/RCC
B.LUT/MCC/RCC
C.LUT/RCC/MCC
D.LUT/RCC/LUT