单选题使用圆规画圆时，应尽可能使钢针和铅芯垂直于（）。A纸面B圆规C比例尺D直线笔
单选题
使用圆规画圆时，应尽可能使钢针和铅芯垂直于（）。
A
纸面
B
圆规
C
比例尺
D
直线笔
参考解析
解析：
暂无解析
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