物理变化的实质是什么

2009年7月22日：世纪日食,为什么成都先观察到日食? 为什么说除中国之外,其他三个文明古国的文化已在地球上消失了,只留下一些历史痕迹.. 除中国以外还有那三个文明古国有神话 中国与三个文明古国的区别 除中国外,其它的三个文明古国是否侵略过别的国家?除中国外,其它的三个文明古国(古埃及,古巴比伦和古印度)是否侵略过别的国家? 成都观测点日食几点开始? ( )豆燃萁 煮豆燃豆萁,这个萁到底怎么读? 曹植——煮豆（ ）萁 一篇关于The Tomato Festival in Spain的英语短文 The running of the bulls is a famous festival in spain.The running of the bulls(公牛)”is a famous festival in Spain． It is held every year from 6th of July to the 14th．The bulls run in the street． The street is about 800 meters 1ong． Anyb in the tomato是什么意思 in the Festival和at the Festival的区别不要告诉我什么一个时间长一个时间短是一个节日里出现的@@@@!@@@!@@@!@@@!@@@!@@@!@@@!@@@ you can get （健康 ） if you eat less and exercise more添一个词health和healthy肯定错 You can become much ___(healthy)if you eat less food and do more exercise.适当形式填空. 22日四川观测日食受天气影响有多大?具体是哪些地方有多云天气不能观测我的意思是22日四川天气如何? 求西班牙翻译一句La vida en Europa Se sentía sola barra, pero le deseo feliz todos los dias 是什么意思呢? 从A地到B地,甲车要行4小时,乙车要行5小时,A.快1/5 B.慢1/5 C.快1/4 D.慢1/4 从九月份到十二月份三个月内我应该怎么安排四级英语复习计划有没有具体点的复习计划啊，还是想通过这三个月的认真学习，真正提高下英语能力，不仅能通过四级考试，还能取得较好点 翻译show off 参观长城等名胜古迹用英语怎么说 They will have an English test in a week .转化为同义句______ ______ _______they have an English test 拜年用英语讲 英语翻译A young man went to a car showroom.He was wearing rubber boots and a dirty jacket.He needed a hair cut badly and was unshaven.The young man looked at an expensive car carefully and then turned to speak to the salesman.“How much does thi 英语拜年话语 给点经典的 人们见面后互相拜年.用英语咋说? It was a difficult time.but we never ___ hopea put up b gave up c picked up d used up 在月球上能观测到日食吗 想知道英语的发展史 how do you like storyA yes i likeb no i do not like c not at alld it is very interesting 选哪个 迷雾的英文怎么拼写 形容事业成功的词汇有哪些?