【单选题】Snow Ranger The two things—snow and mountains—which are needed for a ski area, are the two things that cause avalanches, large mass of snow and ice crushing down the side of a mountain—often called Wh...
【单选题】The two things—snow and mountains—which are needed for a ski area are the two ingredients that create avalanches(雪崩), large masses of snow and ice crushing down the side of a mountain. It was the thre...