三、句子还原
KEY→P42
范畴:人与自然 主题:敬畏自然 体裁:说明文 难度:★★★★ 建议用时:7分钟 评价:/5
请先阅读下面短文,掌握其大意,然后根据短文内容从下面方框内的七个选项中选择五个还原到文中,使短文意思通顺、结构完整。
(2025·天津改编)Today the earth is getting warmer and warmer. But hundreds of years ago, people had a different problem—a 400-year cold period! From the 1400s to the 1800s, winters in the northern half of the earth were colder and longer than they are now. 1.
2. Plants died of cold and illness spread among people. People had to spend a lot more time collecting wood for fires to keep their house warm. And sometimes, a huge piece of ice would slide down a mountain and destroy some villages.
Scientists think the Little Ice Age was caused by power that people could not control. 3. The sun often has "storms" of energy called sunspots(太阳黑子). During the Little Ice Age, there were fewer sunspots than there are today. With fewer sunspots, the sun was giving out less energy which made the earth warm. The volcanic eruption(火山爆发) was another natural cause. 4. Their dust might stop the sun's light and heat from reaching the earth.
Today we are seeing the influences of rising temperature. Scientists think people are causing this change by burning a lot of coal and oil. 5.
A. One cause was the sun.
B. Scientists call this time the "Little Ice Age".
C. So we need to change our way of living.
D. Scientists are trying to stop volcanoes erupting now.
E. During the Little Ice Age, many volcanoes erupted.
F. More and more people were afraid of the colder weather.
G. The colder weather brought many serious problems.

句子还原
本文主要讲述了地球在历史上经历的“小冰期”现象及其可能的原因，并与当前全球变暖现象进行对比。
1. B 从15世纪到19世纪，地球北半球的冬天比现在更冷、更长，说明人类经历了一个400年的漫长寒冷期，因此科学家把这个时期称为“小冰期”。
2. G 疾病在人群中传播，人们拾柴火取暖，大冰块从山上滑落毁坏村庄，这些都是寒冷天气给人们带来的严重问题。
3. A 由于太阳经常发生被称为太阳黑子的能量“风暴”，并且人类不能控制，从而导致小冰期，这是原因之一。
4. E 火山爆发是出现小冰期的另一个原因，因为所产生的灰尘阻止了太阳的光和热。
5. C 人们燃烧大量的煤炭和石油，从而导致气温上升，所以人们应该改变这种生活方式。