x No Plagiarism!uDjQrZlMuJkk5HOhsb9Mposted on PENANA 1,000,000粒沙子是一個丘,467Please respect copyright.PENANA5UR73rnlCR一個丘減掉一粒沙子還是一個丘 ,467Please respect copyright.PENANAqohqS9An4j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? 172.70.130.196ns 172.70.130.196da2