{{I}}Questions 23 to 25 are based on the
following news. At the end of the news item, you will be given 15 seconds to
answer the questions. Now, listen to the
news.{{/I}}
单选题
According to the news, ice from Greenland gives information about
【正确答案】
B
【答案解析】[听力原文]23-25
Scientists say they can tell what air and sea conditions were like hundreds of thousands of years ago. They say pieces of ice taken from Greenland provide such information. Scientists took the ice from more than 1.5 miles deep in huge masses of ice that float on the sea. The ice represents 25,000 years of history. It provides one of the clearest records of ancient weather.
European and American scientific teams have been studying ice from the same area to confirm each other's findings. They measured the oxygen and carbon dioxide in the ice for the temperature. From these measurements, the scientific teams say that the past 10,000 years is the only period during which temperature has not changed very much.
[解析] 根据第25题的题干和选项，可推测本题的答案与weather或temperature有关，故将答案锁定在 [B]和[D]之间。再由新闻中提到的It provides one of the clearest records of ancient weather可知答案为[B]。
单选题
Why are there two teams to study the same ice?
【正确答案】
C
【答案解析】[解析] [A]和[B]的意思相近，故这两个都可能不是答案。由European and American scientific teams...from the same area to confirm each other's findings可知答案为[C]。
单选题
It can be inferred from the measurements that 20,000 years ago,
【正确答案】
D
【答案解析】[解析] 根据常识，从两万年前到现在气候不会保持不变，故[C]很可能不是答案。再由...the past 10,000 years is the only period during which temperature has not changed very much可推断一万年前的气候总在变化之中，故答案为[D]。