CAD2014中的图层怎么用

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{"img": ["https://exp-picture.cdn.bcebos.com/2e223d85e036e291188f6f55b2723d03baea5bfc.m2m?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_500%2Climit_1"]}], [{"txt": ["\u6ce8\u610f\u4e8b\u9879"]}, {"txt": "\u5982\u679c\u60f3\u5728\u67d0\u4e00\u56fe\u5c42\u4e0b\u7ed8\u5236\u4e00\u7c7b\u56fe\u5f62\uff0c\u53ef\u4ee5\u63d0\u524d\u9009\u4e2d\u5b83\uff0c\u5e76\u8bbe\u7f6e\u597d\u5176\u53c2\u6570\uff0c\u6ca1\u5fc5\u8981\u505a\u4e00\u4e2a\u9009\u4e00\u6b21\uff0c\u53ef\u4ee5\u96c6\u4e2d\u505a\u67d0\u4e00\u7c7b\u7684\u56fe\u5f62\u3002"}]]