問題詳情
22. 工程圖中凡是圓或圓柱體，必須劃出
(A)虛線
(B)延伸線
(C)剖面線
(D)中心線。
(A)虛線
(B)延伸線
(C)剖面線
(D)中心線。
參考答案
答案：D
難度：非常簡單1
統計：A(0),B(0),C(0),D(21),E(0)
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