根据题意得:3*12=(12)3=18.
故答案为:18.
This is a very interesting book. I’ll buy it, _____.
A.how much may it cost
B.no matter how it may cost
C.however much it may cost
D.whatever may it cost
一项检查传输错误的控制需要在传输的每一段数据后面增加计算位,被称为()。
A.合理检查
B.奇偶校验
C.冗余校验
D.核对数字