parent_div_1, #parent_div_2, #parent_div_3 {
width: 100px; height: 100px; border: 1px solid red; margin-right: 10px; float: left;}.child_div_1 { float: left; margin-right: 5px;}
width: 100px; height: 100px; border: 1px solid red; margin-right: 10px; float: left;}.child_div_1 { float: left; margin-right: 5px;}名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
