题目8A. 二进制数第i位的位权为<img src="https://tihai-oss-cloud.itihey.com/img/9f45f5f4b710d292b2517ee1de497764.png">B. 八进制数第i位的位权为<img src="https://tihai-oss-cloud.itihey.com/img/bfd883eb9bc40f328e9c733127add104.png">C. 二进制数第i位的位权为<img src="https://tihai-oss-cloud.itihey.com/img/290ef2d0240a240bc2d5b9b8778060fe.png">D. 十六进制数第i位的位权为<img src="https://tihai-oss-cloud.itihey.com/img/70ed753ab219be57439431d20c6d822c.png">