【答案与解析】本文是一篇说明文。科学家们对南极洲的研究已经有一个多世纪了,但像它在冰层下的样子这样基本的细节在很大程度上仍然是个谜。最近科学家在南极洲中部的冰盖下发现了巨大的峡谷。
32.B推理判断题。根据第二段“They expected to find mountains beneath the ice sheet, but the wide canyons they found between the mountains came as surprise."可推断,研究人员意外地发现了新峡谷
33.A细节理解题。根据第四段“If this happens, the canyons could be major factor in the speed and direction of ice flow from central Antarctica to the coast.”可知,峡谷可能会影响冰的流动。