awhen did people start to use fire ?no one knows .but we know it was a long time ago .some people say it was about 200,000 years age .other people say it was 1,000,000 years ago. fire was useful then and fire is useful now . 人们何时开始使用火?没人知道我们知道的.but它是它...
When this epochal achievement possibly occurred; Reference to the book 'Homo erectus'; Importance of the mastery of fire to human development.EBSCO_AspJournal of College Science Teaching
Fire was discovered many thousands of years ago.The first time humans saw fire was probably when a tree was destroyed by lighting(闪电).Humans soon learned how to make fire.They probably made the first fire by rubbing(摩擦)two sticks together.Fire was very important to humans.They needed to...
First you play the role of li yang fang and then the role of Susan you partner Mike has and Kim sun you are at the airport to meet you visitor you know each other so great you visit first talk with him and then take him to the hotel. Pledged to meet you representative someone answe...
But it wasn’t until years later that the true meaning of that painful “first poem” experience dawned on me. As I became a professional writer, it became clearer and clearer to me how fortunate I had been. I had a mother who said, “Buddy, did you really write this I think it’...
students in the first group spent 20 minutes with a dog and its trainer. They watched the trained dogs perform and even played with them. They did this twice a week for 4 weeks. The second group spent the same amount of time(时长) doing exercise to relax. The last group did neither ...
onmethatnootherplacehas,”Ginnisays.“IrememberthefirsttimeIsawahumpbackwhale;it justroseoutofthewaterlikesomeprehistoric creatureandIthoughtitwassmilingatus.You couldstillheartheoperaticsoundsitwasmaking underwater.” Therealizationthatthisisapreciousland,to berespectedbyhumans,wasoneofthebiggest thingsthathi...
A few weeks after the heart operation, my father finally became ___, I can’t imagine that if I didn’t call him and dad did not live through the operation, what kind of life I would have now.【1】A.muchB.moreC.little【2】A.fightsB.happinessC.discussions【3】A.firstB.lastC.nex...
Fire was very important to humans.They needed to keep warm at night.They used fire to cook food.(53)They used fire to keep enemies and wild animals away.In some parts of the world fire was used to send massages.The Indians in America,for example,used fire to make smoke as a message...
Fire was discovered many thousands of years ago. The first time humans saw fire was probably when a tree was destroyed by lightning. Humans soon learned how to make fire. They probably made the first fire by rubbing two sticks together.Fire was very impo