The height of eye correction is smaller than geometrical dip because of （）.<br>A:the angle between the horizontal and the line of sight to the visible horizon<br>B:index error<br>C:parallax<br>D:terrestrial refraction

The height of eye correction is smaller than geometrical dip because of （）.
A:the angle between the horizontal and the line of sight to the visible horizon
B:index error
C:parallax
D:terrestrial refraction

出自：海船船员证

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