磁子午线就是过地球上一点()所指的方向线。A、罗盘仪B、磁针C、经纬仪
磁子午线就是过地球上一点()所指的方向线。
A、罗盘仪
B、磁针
C、经纬仪
相关考题:
下列关于磁场的叙述,其中不正确的是() The following statement about magnetic field is incorrect ()A.在磁铁周围放入小磁针,磁铁产生磁场,取走小磁针,磁铁周围的磁场就消失了Put a small magnetic needle around the magnet. The magnet generates a magnetic field. Take away the small magnetic needle, and the magnetic field around the magnet disappears#B.某一点磁场方向,就是放在该点的小磁针静止时北极所指的方向The direction of the magnetic field at a certain point is the direction of the north pole when the small magnetic needle placed at that point#C.磁感线是有方向的,在磁体周围的磁感线都是从磁体的北极出来,回到南极The magnetic li
磁偏角是:()。A.井口位置磁子午线与地理子午线之间的夹角B.井眼方向线在水平面上投影与网格北之间的夹角C.井眼方向线在水平面上投影与子午线之间的夹角D.井眼方向线在水平面上投影与地理北极之间的夹角