天气预报15天查询> 体育> 一根电线用去1/4还剩3/4米对吗

一根电线用去1/4还剩3/4米对吗

更新时间: 2021-03-13 07:18:46     

1、比如一根电线长1米,用去1/4,即用去1*1/4=1/4米,还剩下1-1/4=3/4米 ,即1*3/4=3/4米。

2、以此类推,假设一根电线长n米,用去1/4,即用去n*1/4=n/4米,还剩下n-n/4=3n/4米,即n的3/4,3n/4米。因此,这种说法是对的。

关键词: 电线

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-833469/ | 耗时:0.2860 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=833469 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=833469 LIMIT 0,1
select * from tbl_Articles_sphinx where id=833469 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(443121,761471,499124,1343418,2325605,476977,2469178,1840944,1021647,3292064,3269585,748842,2181133,1201293,1196302,3262834,1098302,872048,1092709,884262,1144874,3400877,871862,1522078,3406908,3245858,708232,1431454,937384,460378) ORDER BY field (ArticleID,443121,761471,499124,1343418,2325605,476977,2469178,1840944,1021647,3292064,3269585,748842,2181133,1201293,1196302,3262834,1098302,872048,1092709,884262,1144874,3400877,871862,1522078,3406908,3245858,708232,1431454,937384,460378)