单选题 The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that______.

A、 most of the ice melted in the Northern hemisphere
B、 most of the ice melted in the Southern hemisphere
C、 The North Pole is colder than the South Pole
D、 The South Pole is colder than the North Pole

【正确答案】 A

【答案解析】[解析] 根据Scientists have long assumed(假设)that most of the ice that melted was in the Northern hemisphere(半球)during the 30，000 year long ice age． That belief was held because the North Pole is surrounded by land．．．可知答案。