问题
选择题
与20°E经线正好相对的经线是（ ）
A．70°W
B．160°E
C．160°W
D．70°E
答案
经线是连接南北两极，并与纬线垂直相交的半圆．两条相对的经线度数和为180°，除0°经线和180°经线外，东西经度相反．故与20°E经线正好相对的经线是160°W．
故选：C．
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与20°E经线正好相对的经线是（ ）
A．70°W
B．160°E
C．160°W
D．70°E
经线是连接南北两极，并与纬线垂直相交的半圆．两条相对的经线度数和为180°，除0°经线和180°经线外，东西经度相反．故与20°E经线正好相对的经线是160°W．
故选：C．
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