地面任一点沿铅垂线方向到大地水准面的距离就称为该点的相对高程或海拔，简称高程
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The boy in the video did not love the girl.
A. 对
B. 错
The boy and the girl were deeply in love and they got married finally.
A. 对
B. 错
The girl died because of an accident.
A. 对
B. 错
The girl died because her __________ failed.
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