x No Plagiarism!CfR5aIbFsD3QPqEIUcwlposted on PENANA 1,000,000粒沙子是一個丘,633Please respect copyright.PENANAu2tiW7h3Jj一個丘減掉一粒沙子還是一個丘 ,633Please respect copyright.PENANAvCXpwoGlWK假如一直重複這清況的話(每次都減掉一粒沙子),到了最後會是一個丘等於一粒沙子嗎?216.73.216.89ns216.73.216.89da2