How did life on Earth begin? Maybe it began with a lightning strike (一道闪电). According to a new study by Yale University, lightning strikes during Earth’s early history helped make phosphorus (磷). It is important for life. Phosphorus not only helps make DNA and RNA, but also gives...
Stresses the importance of understanding how the Earth formed about 4,500 million years ago to other fields of astronomic investigations. Earth's similarity with the other inner planets; Central problem in the formation of stars; Meteoric impacts on the lunar surface as evidence of enforced ...
选词填空 Where do we come from? How did the universe begin? When we watch the stars through the telescope, we wonder why the universe 1 .After the “Big Bang”, the earth was just a cloud of 2 dust.Somehow it 3 loudl
How did life on Earth begin and evolve?The many different species of living things on Earth (and many species that are now extinct) evolved from very simple living things.Life on Earth began about 3500 million years ago.Evidence for evolution is provided by fossils and from analysis of ...
How did life on Earth begin? Maybe it began with a lightning strike(一道闪电). According to a new study by Yale University, lightning strikes during Earth’s early history helped make phosphorus(磷). It is important for life, Phosphorus not only helps make DNA and RNA, but also gives ...
地球是怎样诞生的? 有人可以给我一些英文文本本条.
Question: How did life begin on the earth? Para 5:ask students to read para. 5 and then answer the question (3m) Question 1. What were those clever animals with hands and feet? Question 2. What have “clever...
人教版高中英语必修三第四单元《HowLifeBeganOnTheEarth》课件.ppt,* 人民教育出版社必修三第四单元How Life Began On The Earth Read the title and look at the pictures on the book. Predict what the reading will be about. The origin of life on the earth. Pre-rea
How did the universe begin? When we watch the stars through the telescope, we wonder why the universe1.After the “Big Bang”, the earth was just a cloud of2dust.Somehow it3loudly with fire and rock, which made the earth's atmosphere.As the earth cooled down, water began to appear ...
1. Why did the woman go to Mallorca? A. To teach Spanish. B. To look for a job. C. To see a friend. 2. What does the man ask the woman to do? A. Take him to hospital. B. Go to a class with him. C. Submit a report for him. 3. Who will look after the children? A...