The "R" and "? " means radius and diameter.
A.正確
B.錯誤
正確答案：正確
題目：The "R" and "? " means radius and diameter.
關鍵字：智慧樹
相關試題
1.The elements of the dimension
2.Thin dashed dotted line to indicate axis line ，symmetrical center lines.
3.Continuous thin irregular line to indicate part sectional boundary lines or to terminate a part view， and for short break line.
4.Thick dashed line shown can be made surface-treatment。
5.A compass is used to draw circles and arcs。
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