（提示：可以反复听，直到听清楚每一个词） 1. Thanks to data collected by satellites, scientists have a good understanding of Antarctica's icy surface, but what lies beneath has remained more of a mystery. 2. The ...

2. b. Last year, global temperatures were cooled slightly by a natural weather pattern in the Pacific called La Niña. 3. b. False.And scientists fear that the planet couldsoon breach the long-term ...