My favorite Invention We knew there had been many inventions last century, for example, telephone, phonograph, airplane, computer and so on. What’s my favorite invention? I think my favorite invention should be telephone.With i...
My new invention: the near future, I will have a new invention! Recently, I saw frequently mother boils water, on that pot always has the residual, I use teacher protestantism, expand with heat and contract with cold's principl...
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024