Because,they have made great contributions to the development.

相关推荐

• 一片英语科技短文的选择here have been many great inventions, things that changed the way we live in. The first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distances. For hundreds of years after that there were few inventions that had as much effect as the wheel. Then in the early 1800's the world started to change. There was little unknown land left in the world. People did not
• 修改文章语法错误I am Chinese. I am proud of being a Chinese with five thousand years of civilization behind. I've learned about the four great inventions made by our forefathers. I've learned about the Great Wall and the Yangtze River. I've learned about Zhang Heng(张衡)and I've learned about Zheng He(郑和)．Who says the Yellow River Civilization has vanished(消失)?I know that my ancestors have made miracles(奇迹)on this fertile land and we're still making miracles. W
• 英语翻译A good memory is a great help in learning a language.Everybody learns his own language by remembering what he hears when he is a small child.Some boys and girls who live in foreign countries with their parents seem to learn two languages almost as easily as one.In school it is not so easy to learn a second language because the pupils have so little time for it,and they are busy with other subjects too.A man's mind is rather like a camera,but it ta
• 阅读短文,在空白处写出各单词的正确形式,单词的第一个字母已给出(初二)There have been many great inventions that changed the way we live.The f____ great invention was one that is still very i____ today----wheel.This made it e____ to carry heavy things and to travel long distance.For hundreds of years after that there were f____ inventions that as important as the wheel.Then in the early 1800's the world started to c_____.There was l_____ unknown land left in the world.People didn't hav
• The king was going to have new clothes _____this wonderful cloth for the great procession.A.be made of B.made into C.made from D.made of
• 句子改错I'm glad you have made such a great progress that you can write your e-mail good Chinese.
• Jimmmy has made great progress recently.A,So do you .B,So you have .C,So you do.D,So have you
• But I have made great progress in English recently.是什么问题的答语
• Thanks to the teacher ,I have made great progress in English.(改为同义句)
• 改错 we have made a great progress ---------
• 修一条路,第一天修了全长的2/5多16米,第二天修了余下的3/4,还剩41米,这条路全长多少米?
• 氯化铝与过量的氨水反应的方程式