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1、1 温馨提示 此套题为 Word 版 请按住 Ctrl 滑动鼠标滚轴 调节 合适的观看比例 答案解析附后 关闭 Word 文档返回原板 块 课堂课堂 1010 分钟达标分钟达标 A sandstorm also known as a dust storm is exactly what it sounds like A very strong windstorm especially in the desert carries clouds of sand or dust that greatly reduces visibility This wind is usually caused b
2、y convection currents 对流气流 which are created by intense heating of the ground and is usually strong enough to move entire sand dunes Air is unstable when heated and this instability in the air will cause higher winds to mix with winds in the lower atmosphere producing strong surface winds Sandstorms
3、 can disturb people s travel and can sometimes destroy whole roads and dry flat areas Similar dust storms can be found on the planet Mars and are thought to be seasonal Today the destruction of forests and too much farming of farmland can lead to sandstorms Too much use of water resources can also c
4、ause sandstorms In the United States of America sandstorms are rare because of the lack of large deserts and more importantly the development of proper agricultural techniques The last recorded destructive sandstorm in 2 American history was the Dust Bowl which occurred on July16 1971and was widely
5、recorded by meteorologists 气象学家 To protect themselves from sandstorms some people wear protective suits Special equipment can be fixed in some cars to prevent sand from getting into the engine Sandstorms can cause coughs and the sand and dust has also been known to carry infectious diseases Sand par
6、ticles unlike dust ones will block air passages and cause a person who breathes them in to choke Dust particles may cause an allergic 过敏的 reaction Skim the passage and find the main idea quickly 答 案 The passage aims to tell us the formation and damage of sandstorms Read the passage again and choose
7、the best answers 1 Which of the following plays the first part in forming sandstorms A The instability of the sand B The instability of the wind C The intense heating of the ground D The speed of the wind 解析 选 C 细节理解题 从第一段的句子 This wind is usually caused by convection currents which are created by in
8、tense heating of 3 the ground 可知沙尘暴的最初形成是因为地面的热量 2 From the second paragraph we can learn that at present A sandstorms are more often seen on Mars than on Earth B sandstorms have led to the lack of clean water resources C farming brings more harm than benefits to humans D human activities are a majo
9、r cause of sandstorms 解析 选 D 细节理解题 从第二段的句子 Today the destruction of forests and too much farming of farmland can lead to sandstorms Too much use of water resources can also cause sandstorms 可知现在 沙尘暴的形成主要是因为人的活动 3 The author will most probably agree that A there will soon be no sandstorms in the USA
10、B humans haven t thought of any way to deal with sandstorms C death caused by sandstorms is increasing all the time D humans should make more efforts to stop soil turning into desert 解析 选 D 推理判断题 从第三段的句子 In the United States of America sandstorms are rare because of the lack of large deserts and more importantly the development of proper agricultural techniques 可 知作者认为人类应该努力不让土地变成沙漠 关闭 WordWord 文档返回原板块
