207. A/BMingLiU","serif"; mso-bidi-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-ascii-font-family: Tahoma;">是不是无穷循环小数 MingLiU","serif"; mso-bidi-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-ascii-font-family: Tahoma;">(1MingLiU","serif"; mso-bidi-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-ascii-font-family: Tahoma;">)B=5^r (2) B=2^n MingLiU","serif"; mso-bidi-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-ascii-font-family: Tahoma;">我选了B 我觉得应该是D 应该任何数除5都会除尽 和2是一个道理! |