二、挑出假珍珠

YiLin Yuanchuang ban - - 智商黑洞 -

现有80粒重量、外形完全相同的珍珠和1粒外形相同、重量较轻的假珍珠,怎样才能用一台天平尽快地将这粒假珍珠挑出来?

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