单选题Deviation is caused by（）.Achanges in the earth's magnetic fieldBnearby magnetic land masses or mineral depositsCmagnetic influence inherent to that particular vesselDthe magnetic lines of force not coinciding with the lines of longitude
单选题
Deviation is caused by（）.
A
changes in the earth's magnetic field
B
nearby magnetic land masses or mineral deposits
C
magnetic influence inherent to that particular vessel
D
the magnetic lines of force not coinciding with the lines of longitude
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