题目内容
(请给出正确答案)
[主观题]
Distance along a track line is measured on a Mercator chart by using the ______.A.latitude
Distance along a track line is measured on a Mercator chart by using the ______.
A.latitude scale near the middle of the track line
B.longitude scale near the middle of the track line
C.latitude scale at the midlatitude of the chart
D.latitude or longitude scale at the middle of the scale
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