A gnomonic projection is based on a(n)（）.<br>A:plane tangent at one point<br>B:cylinder tangent at the equator<br>C:cone tangent at one parallel<br>D:infinite series of cones tangent at selected parallels

A gnomonic projection is based on a(n)（）.
A:plane tangent at one point
B:cylinder tangent at the equator
C:cone tangent at one parallel
D:infinite series of cones tangent at selected parallels

出自：海船船员证

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