无忧黄雨 小本生意 VIP 注册 2004-08-27 消息 4,409 荣誉分数 51 声望点数 158 所在地 京城 2006-06-18 #1 首先,火是什么物质? 其次,射向大地的闪电为什么沿直线传播?
1784 初级会员 VIP 注册 2002-05-22 消息 22,968 荣誉分数 902 声望点数 293 2006-06-18 #10 fire itself is a combination of light and heat, which means microwaves ... it is not a substance ... or it is a motion of particles
fire itself is a combination of light and heat, which means microwaves ... it is not a substance ... or it is a motion of particles
眼睛会说谎 见光死 注册 2005-07-28 消息 4,206 荣誉分数 0 声望点数 0 2006-06-18 #12 最初由 punkren 发布 楼上的是人才啊 点击展开... 不才不才 柴氏也
1784 初级会员 VIP 注册 2002-05-22 消息 22,968 荣誉分数 902 声望点数 293 2006-06-18 #14 lightening travels only the shortest distance, and straight lines represent the shortest distance between two points ...
lightening travels only the shortest distance, and straight lines represent the shortest distance between two points ...
双 双鱼 找到救世主的守护 注册 2006-06-03 消息 1,665 荣誉分数 0 声望点数 46 2006-06-18 #15 最初由 1784 发布 lightening travels only the shortest distance, and straight lines represent the shortest distance between two points ... 点击展开... 这东西好像9年级讲过
最初由 1784 发布 lightening travels only the shortest distance, and straight lines represent the shortest distance between two points ... 点击展开... 这东西好像9年级讲过