【单选题】
A点坐标为（10、20、30），B点坐标为（30、20、30）则AB距离为______。
①
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ZH-CN
X-NONE
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②
Normal
0
7.8 磅
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2
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③
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④
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铅垂线
【单选题】
我国发展新的历史方位
①
A.基本完成社会主义改造
②
B.基本实现社会主义现代化
③
C.经过长期努力，中国特色社会主义进入了新时代
④
D.我国将长期处于社会主义初级阶段
【多选题】
下列关于建筑坐标系的描述，正确的是（）
①
建筑坐标系的坐标轴通常与建筑物主轴线方向一致
②
建筑坐标系的坐标原点应设置在总平面图的东南角
③
建筑坐标系的纵坐标轴通常用A表示，横坐标轴通常用B表示
④
测设前需进行建筑坐标系与测量坐标系的变换