There's no doubt: In the last few decades, the average temperature on Earth has been higher than it has been in hundreds of years. Around the world, people are starting to measure the effects of global warming and trying to figure out what to do about it. Scientists recently used satellites to study the temperatures of lakes around the world, and they found that lakes are heating up. Between 1985 and 2009, satellites recorded the nighttime temperatures of the surfaces of 167 lakes. During those 24 years, the lakes got warmer--by an average of about 0.045 degree Celsius per year. In some, places, lakes have been warming by as much as 0.10 degree Celsius per year. At that rate, a lake may warm by a full degree Celsius in just 10 years. That difference may seem small--you might not even notice it in your bath. But in a lake, slightly warmer temperatures could mean more algae(水藻), and algae can make the lake poisonous to fish. The study shows that in some regions, lakes are warming faster than the air around them. This is important because scientists often use measurements of air temperature to study how Earth is warming. By using lake temperatures as well, scientists can get a better picture of global warming. The scientists say data on lakes give scientists a new way to measure the impact of climate change around the world. That's going to be useful, since no country is too big or too small to ignore climate change. Scientists aren't the only ones concerned, Everyone who lives on Earth is going to be affected by the rapid warming of the planet. Many world leaders believe we might be able to do something about it, especially by reducing the amount of greenhouse(温室) gases we put into the air. That's why the United Nations started the Framework Convention on Climate Change, or UNFCCC. Every year the convention meets, and representatives from countries around the world gather to talk about climate change and discuss global solutions to the challenges of a warming world.
单选题
Scientists have been keeping records of lake temperatures for over 30 years.
【正确答案】
B
【答案解析】[解析] 关键词：Scientists科学家们；keeping records一直记录；lake temperatures湖泊温度；for over 30 years 30多年 根据文中第2段开头的第1句：“科学家们近来利用卫星来研究世界上湖泊温度的变化，而且发现湖温正在上升。”第2句的开头：“在1985至2009年间，……”，可看出共“24年”，而且下一句直接就写“在这24年期间”。由此可判断错误，选B项。
单选题
The temperatures of lakes around the world have increased greatly between 1985 and 2009.
【正确答案】
A
【答案解析】[解析] 关键词：The temperatures of lakes湖泊温度；have increased greatly大大增加了；between 1985 and 2009从1985至2009年 根据文中第2段的第2、3行：“从1985至2009年，……。在这24年间，湖泊的温度变得更高了……。”以此可判断应选A项正确。