题目内容：
方位标通常绘制在设备布置图的右上方，为直径（）mm的细实线圆。
A.20
B.10
C.30
D.40
参考答案：【答案仅供学习，请勿对照自行用药等】
选择题：方位标通常绘制在设备布置图的右上方，为直径（）mm的细实线圆。
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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