【单选题】【消耗次数：1】
直线AB的象限角为南东4°30′，则其坐标方位角αAB为（ ）。
①
4°30′
②
175°30′
③
184°30′
④
355°30′
参考答案：
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A点坐标为（10、20、30），B点坐标为（30、20、30）则AB距离为______。
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mso-hansi-theme-font:minor-latin;
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mso-para-margin-bottom:.0001pt;
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font-size:10.5pt;
mso-bidi-font-size:11.0pt;
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铅垂线
【单选题】
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①
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②
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③
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④
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