【英语】2017届高考复习最新6年高考4年模拟分类汇编：第三章 阅读理解第六节 科普知识类

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第六节 科普知识类 第一部分 六年高考题荟萃 20xx年高考题 Passage 1 (10•安徽B篇) Have you ever wondered? 1. Why do airplanes take longer to fly west than east? It can take five hours to go west-east from New York(NY) to London bur seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west-east direction when they are moving with the wind than in the opposite direction. 2. What would happen if the gravity on Earth was suddenly turned off? Supposing we could magically turn off gravity. Would buildings and other structures(建筑物) float away? What happened would depend on how strongly the things were attached to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hours. If you turn something around your head on a strin...，大小：5.01 MB