单选题
The sun's heat warms the air and makes it move. This movement is called a wind. Different parts of the Earth receive different amounts of heat. Near the equator(赤道), the sun is overhead and heats the Earth intensely (强烈). Nearer the poles, the sun's rays strike the Earth at a low angle so the heat is not so intense. A lot of the earth's heat is reflected back into spaces, by the atmosphere, clouds, dust in the air and by water, snow and ice. So some parts of the Earth are warm and some are cold. Warm air tends to rise and creates areas of high pressure. As warm air rises, cold air flows in and replaces it. The greater the pressure difference is, the stronger the wind blows.
单选题
The sun's heat______. A. makes the air move B. makes the air still C. makes the air cold D. reflects back into space
【正确答案】
A
【答案解析】[解题指要] 本题考查的是对细节的把握能力。该题可以从文章第一段第一句The sun's heat warms the air and makes it move得出答案。
单选题
A strong wind is usually caused by a difference in______. A. heat B. pressure C. atmosphere D. air
单选题
Some parts of the Earth is warm and some are cold because______. A. a lot of the heat is reflected B. there are clouds and dust in the air C. different parts of the Earth receive and reflect different amount of heat D. different parts of the Earth have different sources of heat
【正确答案】
C
【答案解析】[解题指要] 本题考查的是对细节的把握能力。该题可以从文章第一段第三句Different parts of the Earth receive different amounts of heat推导出C选项。
单选题
The best title of the article is______. A. The Sun's Heat B. Pressure C. Atmosphere D. Why Do Winds Blow
【正确答案】
D
【答案解析】[解题指要] 本题考查的是对文章主旨大意的把握能力。标题反映文章大意，要求选项的归纳范畴恰如其分，既不能只提文章中的一个细节，犯理解过窄的错误，也不能将本文以外的内容概括于其中，犯理解过宽的错误。一般主旨题的解题方法有两个： (1)观察文章或段落的结构。 “一般一具体”型首段做总的说明，其他段落分别说明或具体论述首段的观点。属于这种结构的文章主题在首段。同样，属于这种结构的段落，主题句则在该段的第一句。第39题就体现了这个特点。The sun's heat warms the air and makes it move就是主题句。 “具体—一般”型前面几段分别说明，末段总结。这种结构的文章主题在末段。 (2)根据论述详略确定。通常与主题有关的部分有较详尽的论述，而与主题关系不够密切的部分论述较简略。