单选题If a magnetic compass is not affected by any magnetic field other than the Earth’s,which statement is TRUE? ()ACompass error and variation are equalBCompass north will be true northCVariation will equal deviationDThere will be no compass error

单选题
If a magnetic compass is not affected by any magnetic field other than the Earth’s,which statement is TRUE? ()
A

Compass error and variation are equal

B

Compass north will be true north

C

Variation will equal deviation

D

There will be no compass error


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磁场(magnetic field)

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