天气预报15天查询> 其他> 生活中的三棱锥有哪些

生活中的三棱锥有哪些

更新时间: 2020-09-17 00:00:00     

三棱锥的概念:三棱锥是锥体的一种,由四个三角形组成,亦称为四面体。三棱锥固定底面时有一个顶点,不固定底面时有四个顶点。生活中常见的三棱锥主要有:相机三脚架形成的空间图形、粽子、酒心糖等。

关键词: 生活 棱锥 哪些

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-2639166/ | 耗时:0.5466 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2639166 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2639166 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2639166 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1090663,1041835,3192219,1066020,1076868,1065303,1128910,1056836,1044565,1128023,1068262,1052351,1062626,1041343,1089058,1075423,1014587,1072278,1115819,1100430,1087745,1114000,1044841,1083946,1069793,1110027,1082964,1086091,1091442,997282) ORDER BY field (ArticleID,1090663,1041835,3192219,1066020,1076868,1065303,1128910,1056836,1044565,1128023,1068262,1052351,1062626,1041343,1089058,1075423,1014587,1072278,1115819,1100430,1087745,1114000,1044841,1083946,1069793,1110027,1082964,1086091,1091442,997282)