你可能感興趣的試題

Geostationary satellites are the artificial satellites which（）.

A.always move slowly
B.are in one place only
C.sometime move sometime don‟t move
D.are synchronizing with the movement of the earth

單項(xiàng)選擇題

What following is not among the functions of SOLAS ships?（）

A.receive shore-to-ship distress alerting
B.transmit ship-to-shore distress alerting
C.receive message for public correspondence
D.transmit and receive locating signals