Astronomy:the science of the stars课件2.ppt

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1、成才之路 英语路漫漫其修远兮 吾将上下而求索人教版 必修 3Astronomy: the science of the starsUnit 4话 题 导 入vThe Greeks studied astronomy over 2,000 years ago. They could see the size, color, and brightness of stars. They could see their places in the sky. They watched the stars move as the seasons changed. But the Greeks had no

2、 tools to help them study the starry heavens.vEach new tool added to the files of astronomy; it helped man reach out into space. Until there were telescopes(望 远镜 ), man knew little about the moon. They did not know that the planet called Saturn(土星)has rings around it. Their sight was so limited that

3、 they could not see all the planets. In the early 1700s, people thought there were only six planets.vBefore the spectroscope(分光 镜 ), man did not know what kind of gases are in the sun or other stars. Without the radio telescope(电 波望 远镜 ) we did not know that radio noises come from far out in space.v

4、Today, astronomy is a growing science. We have learned more in the last fifty years than in the whole history of astronomy.v1 The passage mainly tells us _.vA the spectroscope helps man know what kind of gases are in the sun and other starsvB there are eight planets in spacevC there was much noise i

5、n spacevD science cant grow fast without modern technologyv2 Thousands of years ago, _.vA man watched the stars with their eyes vB telescopes helped man to study the starsvC man knew nothing about the sky vD man knew Saturn has rings around itv3 When the Greeks watched the stars, they knew all of th

6、e following except_.vA the color of the stars B the size of the starsvC the movement of the stars D what the stars were made ofv4 Man now knows _.vA the moon has rings around it vB there are six planetsvC Saturns rings can be seen by human eyes vD radio noises come from far out in spacev文章大意: 天文学是最古老的科学。随着科技进步,我们对它的认识也越来越多。v1 D 主旨大意 题 。文章第一段 为 主 题 段,此段的最后一句 话为 主 题 句,其他段都是 围绕这 一主 题 展开,故答案 选 D。v2 A 细节 理解 题 。由第一段第二、三句话 可知,在几千年前人 们 主要通 过 肉眼来 观察星球。v3 D 细节 理解 题 。由第二段可知,只有 D项 的内容 “星球是由什么 组 成的 ”没有提到。v4 D 推理判断 题 。由第四段最后一句可推知, 现 在人 们 已 经 知道无 线电 噪声来自遥 远的外太空。

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