【单选题】【消耗次数：1】
移出断面图在下列哪种情况下要全标注
①
按投影关系配置的断面
②
放在任意位置的对称断面
③
配置在剖切位置延长线上的断面
④
不按投影关系配置也不配置在剖切位置延长线上的不对称断面
参考答案：
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相关题目
【单选题】
下列关于断面图相关说法有误的一项是（ ）。
①
断面图同剖面图一样，都是假想剖切后得到的
②
断面图一般只使用单一剖切平面引入断面图的目的是为了表达物体的内部形状和结构
③
引入断面图的目的是为了表达物体的内部形状和结构
④
剖面图和断面图所表达形体的对象不同，断面图中只画物体被剖开后的截面投影
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