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【简答题】
在用六分仪测物标垂直角求距离时，如果物标的高度（H）、测者距物标的距离（D）、测者眼高（e）和物标垂足的岸水线的距离（d）满足D>>H>e和H>D．则测距误差： A. A．3e
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参考解析：
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【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth．By international agreement, the meridian of longitude passing through Greenwich, ...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
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A.
30
B.
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C.
1.5
D.
100