[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fniWMp2W9Vd29SVvLDrBcE607Lgr7L_2Ymk2EKGnQaIw":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2023-06-29 02:05:02",87777885,[8,9,10,11],"D=H×tanα\u002F1852","D=H÷tanα\u002F1852","D=H×sinα\u002F1852","D=H×cosα\u002F1852",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},41,"6999baf8312c7db9fa3efcaaf3bd4737","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0d34a3785e1f89f8e5d01615882f6283.jpg","地文航海","3544a763e06f4501bddf94bb96b0eb1a","陆标识别与测量","使用六分仪测定已知高度H的物标的垂直角α,求距离D的公式是______",[21,26,35,44,53,62,71,80,89,98],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",0,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],87777886,[30,31,32,33],"D=Htanα","D=Hcotα","D=1.856H\u002Fα","D=1.865α\u002F H","用六分仪观测已知高度H的物标垂直角α,求船与物标的水平距离D 的公式为______",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],87777887,[39,40,41,42],"485","501","295","300","某船在航行中用六分仪观测未知高度的物标垂直角α=1º.5,用雷达测得船与物标的水平距离是10n mile,则未知物标的高度应为______",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],87777888,[48,49,50,51],"281m","291m","295m","300m","某船在航行中用六分仪观测未知高度的物标垂直角α=45′,用雷达测得船与物标的水平距离是12n mile,则未知物标的高度应为______",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":24,"type":25},[],87777889,[57,58,59,60],"15n mile","15433m","15.5 n mile","8.3n mile","某船在航行中用六分仪观测已知高度500的物标垂直角α=60′,则船与物标的水平距离D为______",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":24,"type":25},[],87777890,[66,67,68,69],"9325m","932.5m","5 n mile","9.3n mile","某船在航行中用六分仪观测已知高度150的物标垂直角α=30′,则船与物标的水平距离D为______",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":24,"type":25},[],87777891,[75,76,77,78],"利用对景图","利用等高线","利用已知船位识别","以上都是","初到陌生海岸,识别沿岸物标的基本方法是______",{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":24,"type":25},[],87777892,[84,85,86,87],"将海图上没有标绘但有导航价值的物标注在海图上","将正在航行的他船的位置标注在海图上","将正在锚泊的他船的位置标注在海图上","A+C","利用船位识别物标的方法还可以______",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":24,"type":25},[],87777893,[93,94,95,96],"根据未知物标和已知物标间的相对位置关系识别","根据准确船位和末知物标间的相对位置关系识别","A.B都正确","A.B都不正确","在陆标定位时,下列识别陆标的方法是否正确",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":24,"type":25},[],87777894,[102,103,104,105],"I、III、IV","I、II、III","II、III、IV","I、II、III、IV","下列哪些是航海上常用的陆标识别的方法?(I、利用对景图;II、利用等高线;III、船位;IV、利用已知物标)"]