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六、阅读与回答问题
What is a tornado (龙卷风)? A tornado is a spinning (旋转的) tower of air that goes from the sky to the ground. Tornadoes can cause huge amounts of damage and once they start, they cannot be stopped.
What causes tornadoes?
Tornadoes happen in many parts of the world. The United States experiences around 1,000 tornadoes and has some of the most powerful ones a year.
The exact cause of tornadoes is not fully known. They form during thunderstorms. Inside the storm clouds, warm and humid (湿热的) air rises and cool air falls. The warm and cool air begin to spin horizontally (水平地). Eventually, this spinning can become vertical and push itself out of the storm clouds as a funnel (漏斗). The moment the funnel of spinning air touches the ground, it becomes a tornado.
Levels of tornadoes
There are three levels of tornadoes: weak, strong and violent.
Around two thirds of tornadoes are weak. These tornadoes have wind speeds that are below 177 km/h and they usually last no longer than ten minutes.
Strong tornadoes make up about one third of all tornadoes. They have wind speeds that are between 178 km/h and 322 km/h and can last about twenty minutes.
The most dangerous tornadoes are violent tornadoes. They can last for longer than an hour and have wind speeds that are higher than 322 km/h.
51. What is a tornado?
52. Which country do tornadoes often hit according to the passage?
53. How many levels of tornadoes are there?
54. What are the wind speeds of strong tornadoes?
55. What can you do when there is a violent tornado? (请自拟一句话作答)
What is a tornado (龙卷风)? A tornado is a spinning (旋转的) tower of air that goes from the sky to the ground. Tornadoes can cause huge amounts of damage and once they start, they cannot be stopped.
What causes tornadoes?
Tornadoes happen in many parts of the world. The United States experiences around 1,000 tornadoes and has some of the most powerful ones a year.
The exact cause of tornadoes is not fully known. They form during thunderstorms. Inside the storm clouds, warm and humid (湿热的) air rises and cool air falls. The warm and cool air begin to spin horizontally (水平地). Eventually, this spinning can become vertical and push itself out of the storm clouds as a funnel (漏斗). The moment the funnel of spinning air touches the ground, it becomes a tornado.
Levels of tornadoes
There are three levels of tornadoes: weak, strong and violent.
Around two thirds of tornadoes are weak. These tornadoes have wind speeds that are below 177 km/h and they usually last no longer than ten minutes.
Strong tornadoes make up about one third of all tornadoes. They have wind speeds that are between 178 km/h and 322 km/h and can last about twenty minutes.
The most dangerous tornadoes are violent tornadoes. They can last for longer than an hour and have wind speeds that are higher than 322 km/h.
51. What is a tornado?
A spinning tower of air that goes from the sky to the ground.
52. Which country do tornadoes often hit according to the passage?
The United States.
53. How many levels of tornadoes are there?
Three.
54. What are the wind speeds of strong tornadoes?
Between 178 km/h and 322 km/h.
55. What can you do when there is a violent tornado? (请自拟一句话作答)
We can keep calm and stay at home. (言之有理即可)
答案
51. A spinning tower of air that goes from the sky to the ground.
52. The United States.
53. Three.
54. Between 178 km/h and 322 km/h.
55. We can keep calm and stay at home. (言之有理即可)
52. The United States.
53. Three.
54. Between 178 km/h and 322 km/h.
55. We can keep calm and stay at home. (言之有理即可)
解析
【分析】本题为英语阅读理解的回答问题题型，解题思路是：先通读全文把握大意，再针对每个问题定位原文对应段落，提取关键信息作答；第55题为开放性试题，需结合龙卷风安全常识合理表达。
【解析】
51. 定位到文章第一段第一句，原文明确给出龙卷风的定义，直接提取即可。
52. 定位到“What causes tornadoes?”部分的第二段，原文提到美国每年经历约1000次龙卷风，是龙卷风常袭击的国家，据此作答。
53. 定位到“Levels of tornadoes”部分，原文说明龙卷风有三个等级，直接提取数量即可。
54. 定位到“Strong tornadoes”的描述内容，原文明确给出强龙卷风的风速范围，直接提取。
55. 结合龙卷风来临时的安全常识，表达合理的应对措施即可。
【答案】
51. A spinning tower of air that goes from the sky to the ground.
52. The United States.
53. Three.
54. Between 178 km/h and 322 km/h.
55. We can keep calm and stay at home. (言之有理即可)
【知识点】英语阅读理解、细节信息查找
【点评】本题为基础的英语阅读理解题，前四题考查原文细节的定位与提取，第五题考查结合生活常识的开放性表达，整体难度较低，学生通过认真阅读原文即可完成作答。
【难度系数】0.8
【解析】
51. 定位到文章第一段第一句，原文明确给出龙卷风的定义，直接提取即可。
52. 定位到“What causes tornadoes?”部分的第二段，原文提到美国每年经历约1000次龙卷风，是龙卷风常袭击的国家，据此作答。
53. 定位到“Levels of tornadoes”部分，原文说明龙卷风有三个等级，直接提取数量即可。
54. 定位到“Strong tornadoes”的描述内容，原文明确给出强龙卷风的风速范围，直接提取。
55. 结合龙卷风来临时的安全常识，表达合理的应对措施即可。
【答案】
51. A spinning tower of air that goes from the sky to the ground.
52. The United States.
53. Three.
54. Between 178 km/h and 322 km/h.
55. We can keep calm and stay at home. (言之有理即可)
【知识点】英语阅读理解、细节信息查找
【点评】本题为基础的英语阅读理解题，前四题考查原文细节的定位与提取，第五题考查结合生活常识的开放性表达，整体难度较低，学生通过认真阅读原文即可完成作答。
【难度系数】0.8
