有12只形状、大小完全一样的零件,其中有一只重量较轻的不合格品。你能用天平只称三次就找出这只不合格品吗?*@.j.j2`1u,^-i's/T0w4p
算式:提示+H'w-y)a6t-s(l3E*@.j.j2`1u,^-i's/T0w4p
答:6y(X-X7e9w4H,D。*@.j.j2`1u,^-i's/T0w4p