题型:阅读理解 题类:常考题 难易度:普通
江西省南昌市八一中学、洪都中学、十七中、实验中学、南师附中五校2019-2020学年高二上学期英语期中联考试卷
When an ice cube melts, it creates a puddle (水坑). When an ice sheet (冰盖)melts, it raises sea levels. It sounds simple, but scientists have debated for decades whether both the Antarctic and Greenland ice sheets actually were shrinking, and how much that melting contributed to rising sea levels.
Now, a new study has provided the best evidence of how the polar ice sheets are responding to our warming world. In the study, an international team of scientists looked at 20 years of' data in the ice sheets collected by 10 satellite missions. The team's conclusion: The Greenland and Antarctic ice sheets both are losing ice overall. The researchers also found that between 1992 and 2011, melt water from those shrinking ice sheets caused sea levels to rise by about 11 millimeters.
Over the 19 years studied, the Greenland ice sheet lost 2.7 trillion metric tons of ice. The Antarctic ice sheet also shrank by about 1.3 trillion metric tons. Previously, some scientists disagreed whether the Antarctic sheet, the largest mass of ice in the world, was shrinking or growing or neither.
While the Earth is warming overall, the effect of climate change varies from region to region. Over the last 15 years, for example, scientists have something disagreed over how climate change has affected the polar ice sheets. Many studies found that the sheets lost a lot of ice and that not enough snow fell on the sheets to compensate for the loss. But other studies found that the loss of ice was balanced by the gain in snowfall.
Richard Alley, a glacier scientist at Penn State University, said that many of those studies looked at different areas, and over different time periods. In addition, the studies didn't all use the satellite data in the same way. Those differences made, it difficult to compare the results.
The data in the new study matched time periods and areas. The study also combined measurements from kinds of satellites.
Journey |
40 pages Age Range: 4-8 years Publisher: Candlewick (6 Aug. 2013) Language: English Price: $ 10.72 |
Introduction | A girl can't get the attention of her busy family. She goes to her room feeling sad but discovers a red crayon and draws a magic door on her bedroom wall and through it escapes into a world where wonder, adventure, and danger abound (大量存在). On her journey, she finds people are trying to catch a bird. She rescues the bird with courage but finds herself caught and placed in a cage. The grateful bird helps her escape and together they fly to safety and back to the city where the girl lives. |
About the author | Born in Baltimore, Aaron Becker moved to California to attend Pomona College where he scored his first illustration (插图) job designing T-shirts. Then, he traveled to Kenya, Japan and Sweden backpacking around while looking for interesting things and feeding his imagination. He's now busying at work on his next book project. |
Reviews | By Barb Mechalke on November 23, 2019 This is a beautiful book and tells a story only with illustrations. |
By Elise Nuttall on August 11, 2017 It's a picture book, and it's so inventive and creative! I "read" it with my niece and she absolutely loved that book. She could understand the story without having to struggle as a new reader | |
By Colby J Cuppernull on September 11, 2013 I read this book with my three-and-a-half-year-old son last night. Tonight, when we read it again, it is slightly different. New words are used to give voice to the story told through the images. Every time we read this book, it will become new. |
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