题目内容

半圆方向30°NW换算成圆周方向为__。30°NW measured by semicircle direction iswhich is measured by circle direction.

A. 210°
B. 240°
C. 300°
D. 330°

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罗经点方向N/W换算成圆周方向为__ 。Compass point N/W is which is measured by circle direction.

A. 348°.75
B. 281°.25
C. 315°
D. 337°.5

measured for the parallel circle to equator northward or southward, and the range is 0°～90°6. 地球上某点φ＝40°N，λ=120°E，则它与地轴的对称点是_________。Which one is the symmetric point(40°N，λ=120°E) about axis of earth?

A. φ＝40°N，λ＝120°W
B. φ＝40°S，λ＝120°E
C. φ＝40°N，λ＝060°W
D. φ＝40°S，λ＝060°W

measured for the parallel circle to equator northward or southward, and the range is 0°～180°

A. 自该点等纬圈向南或向北度量到赤道，度量范围0°～90°。

measured from the meridian of the point to Greenwich meridian eastward or westward, 0°～360°

A. 由格林子午线向东或向西度量到该点子午线，度量范围0°～180°。