题目

At Beaver Creek, The Extraordinary Awaits YouAre no two snowflakes alike? The snowflakes we see in the winter are most likely completely unique from one other.Beaver Creek is a great place to experience the beauty of the snow, with programs for everyone—from children, teens, and women-only lessons to small groups and private-guided experiences.First Track, from Beaver Creek Reserve, lets you be the first on the mountain, with an adventure that begins at 7:30 a.m. when you are met by ski professionals and taken on a private, guided tour—before the mountain is open to the public. Once you ha 400 t含Fe2O3　80％的赤铁矿石，与________t含70％Fe3O4的磁铁矿石含铁量相同．最多可炼出含碳和其他杂质8％的生铁________t．