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A Mercator chart is a ______.
A.cylindrical projection
B.simple conic projection
C.polyconic projection
D.rectangular projection
参考答案
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单选题（）is a digitized“picture”of a chart.A
Vector chart formatB
Raster chart dataC
pixelD
Electronic Nautical Chart
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单选题A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities?（）A
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selection, projection, joinC
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intersection, projection, joinE
difference, projection, product
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单选题The only cylindrical chart projection widely used for navigation is the（）.A
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MercatorC
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Mercator projectionB
polyconic projectionC
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单选题On a Mercator chart，1 nautical mile is equal to（）.A
1 minute of longitudeB
1 degree of longitudeC
1 minute of latitudeD
1 degree of latitude
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单选题What area of the earth cannot be shown on a standard Mercator chart（）.A
EquatorB
Areas including both North and South latitudesC
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A narrow band along the central meridian
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单选题Distance along a track line is measured on a Mercator chart by using the （）.A
latitude scale near the middle of the track lineB
longitude scale near the middle of the track lineC
latitude scale at the midlatitude of the chartD
latitude or longitude scale at the middle of the scale
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单选题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 projectionB
Lambert conformal projectionC
Transverse Mercator projectionD
Polyconic projection
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单选题For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?（）A
Plotting radio bearings over a long distanceB
Determining latitude and longitude of a fixC
Measuring rhumb line distancesD
Measuring rhumb line directions
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单选题A Mercator chart is a （）.A
cylindrical projectionB
simple conic projectionC
polyconic projectionD
rectangular projection
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