【简答题】The earth is a special planet in the solar system. The explosion of the earth produced carbon, nitrogen, vapor and other gases, 小题1: (make) the earth’s atmosphere. What is even more important is _ 小题2...
【简答题】The earth is the only planet that scientists are certain has life .What does the earth have that the other planets don’t ? For one thing , the earth has just the right temperature . As the third plane...