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【单选题】
以下有关装配图的说法正确的是________。A.
所有的零、部件都应编写序号；或将所有标准件的数量、标记按规定标注在图上，标准件不占编号，而将非标准件按序号编写。
B.
用细点画线来表示的运动零件极限位置的外轮廓
C.
所有的零、部件序号须一致
D.
倒角应该夸张画出
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