单项选择题
A.禹B.尧C.舜D.鯀
A.十进制B.六十进制C.八进制D.二进制
A.1520B.2525C.3320D.2520
A.x=k1/r1+k2/r2……+kn/rn +kDB.x=k1+r1+k2+r2……+kn+rn +kDC.x=k1·r1+k2·r2……+kn·rn +kDD.x=r1+r2……+rn +kD
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