Magnetic information on a chart may be ______.
A.found in the center(s) of the compass rese(s)
B.indicated by isogonic lines
C.found in a note on the chart
D.All of the above
正确答案：D
海图上的磁场信息能够在罗经花的中心被找到通过等磁差曲线显示海图的备注
Magneticinformationonachartmaybe______Afoundinthe
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