【单选题】光学经纬仪安置 于 O 点 上,瞄准左目标 M ,水平度盘的读数为 304 ° 28 ′ 18 ′′,瞄准目标 N 的水平度盘读数为 76 ° 52 ′ 54 ′′,则水平角∠ MON 为
【单选题】消除静电危害最简单、最常用的方法是( )。
【简答题】What document presented under an L/C is treated as original? (1)( ) A statement in a document that another document is the sole original. (2)( ) If the document 1) appears to be written, typed, perf...