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单项选择题

挠性联轴器的组成中必须含有弹性元件。
A、正确
B、错误

判断题

A cutaway drawing is a technical illustration, in which surface elements of a three-dimensional model are selectively removed, to make internal features visible, but without sacrificing the outer context entirely.剖视图是一种技术图解，其中三维模型的表面元素被选择性地去除，但不完全牺牲外部描绘。