问题
单项选择题
The only cylindrical chart projection widely used for navigation is the（）.
A.Lambert conformal
B.Mercator
C.aximuthal
D.gnomonic
答案
参考答案：B
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The only cylindrical chart projection widely used for navigation is the（）.
A.Lambert conformal
B.Mercator
C.aximuthal
D.gnomonic
参考答案：B