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【单选题】
用磁体引偏检查磁岁经的灵敏度是否符合要求时，要求新航向和引偏前的航向误差小于_______。A.
±1°
B.
±0.5°
C.
±0.2°
D.
±2°
拍照语音搜题，微信中搜索"皮皮学"使用
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