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能否用一个下拉框改变画面变量 然后控制几个组件的显示 就跟vue的v-if一样
下拉框值变化事件可以修改画面变量 每个组件都可以根据变量控制显示隐藏，可以参考视频https://appxow65u356815.pc.xiaoe-tech.com/p/t_pc/course_pc_detail/video/v_65853051e4b04c100940f6dd
