下列选项中,不属于早期计算工具的是()
A.mso-bidi-font-family:"TimesNewRoman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA"> 小石头
B.mso-bidi-font-family:"TimesNewRoman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA"> 算盘
C.mso-bidi-font-family:"TimesNewRoman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA"> 钱币
D.mso-bidi-font-family:"TimesNewRoman";mso-bidi-theme-font:minor-bidi; color:#002060;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA"> 计算尺