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单选题
地球上某点φ＝40°N，λ=120°E，则它与地心的对称点是（）。
A
φ＝40°S，λ＝120°W
B
φ＝40°S，λ＝120°E
C
φ＝40°N，λ＝060°W
D
φ＝40°S，λ＝060°W
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