萌萌心爱的3×3×3魔方掉进了化粪池,萌萌捡起来后拆开魔方,随意捡起一块放进嘴里,不中招的概率是___.
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$3\times 3\times 3-1\times 1\times 1\times 6$$=27-6$$=21$故答案为:$21$. 结果二 题目 立体魔方,将六面中间挖走的小正方体,则剩下的几何图形体积为___. 答案 3×3×3=271×1×1=127-1×6=21答:则剩下的几何图形体积为21.故答案为:21.相关...
I called Hannah three times yesterday evening, but I couldn’t get through, her brother ___on the phone all the time.A.was talkingB.has been talkingC.has ta-高中英语-魔方格
The new stadium being built for the next Asian Games will be ___ the present one. [ ]A. as three times big as B. three times as big asC. as big as three t-高中英语-魔方格
3×3×3魔方拆开后有27块,基本事件总数n=27,掉入化粪池后,只有最中间的那一块没有脏,∴不中招的概率是:p= 1 27.故答案为: 1 27. 3×3×3魔方拆开后基本事件总数n=27,掉入化粪池后,只有最中间的那一块没有脏,由此利用等可能事件概率计算公式能求出不中招的概率. 本题考点:古典概型及其概率计算公式 ...