甲与乙比赛登楼,他俩从36层的某大厦底层出发,当甲到达6层时,

甲与乙比赛登楼,他俩从36层的某大厦底层出发,当甲到达6层时,乙刚到达5层,按此速度,当甲到达顶层时,乙可达( )
A.31层B.30层C.29层D.28层

答案

B解析:
p;【解析】略

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