A:跌落
B:升高
C:不变
D:居高不下
-- Anna, could you lend me this book, please?
-- I'm sorry. I it for only two days, and I haven't finished it yet.
南极洲是地球上最冷的陆地.1960年8月,科学家在东方站曾测得﹣88.3℃的极端最低气温.这里也是世界上风力最大和风暴最多的地方,每年约有23的时间刮大风.南极洲的年平均降水量仅为55mm,是世界上降水最少的大陆.
—A new phone.