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【单选题】
设某轮首次观测甲物标角26°.5,第二次观测甲物标角45°,两次观测间的航程是S,那么该轮到达甲物标的正横距离约是 。A.
2S
B.
S/2
C.
3S
D.
S
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【简答题】拓展训练:练习 2.5.5 案例实战四:卡通风格定位图标制作 。 要求:正确运用视频中的操作方法制作 卡通风格定位图标 ; 将文件保存为psd格式,文件名命名为“姓名+ 2.5.5 卡通风格定位图标 ”,上传提交。
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【单选题】根据《城市规划制图标准》，点的平面定位坐标系和竖向定位的高程系都符合规定的是( )
A.
北京坐标系相对高度
B.
西安坐标系黄海高程
C.
WGS一84坐标系吴淞高程
D.
城市独立坐标系珠江高程
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