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單項(xiàng)選擇題

The position of the INMARSAT satellite over the Atlantic Ocean Region-W is（）.

A.180E above the equator
B.64.5 E over the IOR
C.15.5W along the straight line
D.55.5W above the equator

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單項(xiàng)選擇題

Mariners should pay much attention in the overlapped area owing to（）.

A.complicated circumstances
B.changeable atmospheric pressure
C.large density of traffic
D.some strong signals from unwanted satellites

單項(xiàng)選擇題

The satellites over the major ocean regions cover the globe（）.

A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70N and below 70S
D.as far north and south 70

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