单项选择题
A.to get B.to approach C.to proceed D.to close
Induced magnetism is found in（）.A.hard ironB.soft ironC...
单项选择题Induced magnetism is found in（）.
A.hard iron B.soft iron C.vertical iron only D.horizontal iron only
If several fixed navigational lights are visible at the...
单项选择题If several fixed navigational lights are visible at the same time，each one may be positively identified by checking all of the following EXCEPT what against the Light List?（）
A.Rhythm B.Period C.Intensity D.Color
How is variation indicated on a small-scale nautical ch...
单项选择题How is variation indicated on a small-scale nautical chart?（）
A.Magnetic compass table B.Magnetic meridians C.Isogonic lines D.Variation is not indicated on small-scale nautical charts
