矿山测量规程要求,当预计误差超过允许误差时,应采取哪些措施确保贯通精度?
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Based on your 2209 fix,which would be a warning that you are being set down on Block Island Sound South Entrance Obstruction Lighted BIS Buoy? ()
A. Decreasing loran readings on 9960-W
B. Visual bearings of Montauk Point Lt. changing to the left
C. Increasing bearings of Southeast Point Light
Decreasing sounding
典型故障树是一种表示设备典型故障因果关系的模型。它以最不希望发生的设备故障状态作为顶事件,找出可能导致这一故障状态发生的直接原因的中间事件,直至无需分解的原因底事件。
A. 正确
B. 错误
硼砂又称()
A. 硇砂
B. 月石
C. 丹砂
D. 望月石
E. 月明砂