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单选题
In which voyage, between two points, is the rhumb line distance not approximately the same as the great circle distance?（）.
A
The two points are in low latitudes in the same hemisphere
B
The two points are in high latitudes in the same hemisphere
C
The two points are near the equator, but in different hemispheres
D
One point is near the equator, one point is in a high latitude, and both are near the 180th meridian
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three rockets，one of which shall be the buoyant typeC
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