单项选择题
A.used at the earliest opportunity B.hydro-tested C.recharged D.weighed again in one month
A chart with a scale of 1:80，000 would fall into the ca...
单项选择题A chart with a scale of 1:80，000 would fall into the category of a（）.
A.sailing chart B.general chart C.coastal chart D.harbor chart
A chart with a natural scale of 1:160，000 is classified...
单项选择题A chart with a natural scale of 1:160，000 is classified as a（）.
A.sailing chart B.general chart C.coast chart D.harbor chart
A chart projection depicting the poles and a small area...
单项选择题A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
A.azimuthal gnomonic projection B.Lambert conformal projection C.transverse Mercator projection D.polyconic projection
