航海英语 航海英语 Lesson on Prevailing Winds and Fogs 盛行风与雾.pptx

;;Prevailing Winds 盛行风;Something You Need to Know 课前热身;Vocabulary 单词总览;A Glimpse of Pressure Belts 气压带纵览;A Glimpse of Prevailing Winds 图览盛行风①;A Glimpse of Prevailing Winds 图览盛行风②;Land and Sea Breeze 陆海风;Monsoon 季风;Briefing 风带小结;One Sentence for Each Pressure Belt 气压带简述;About Land and Sea Breeze 关于陆海风;Insight into Monsoon 关于季风;Practice 练习 1. In regions near poles, the winds are generally described as _____ A. Westerlies B. Easterlies C. Northerlies D. Southerlies ;Practice 练习 1. In the doldrums , you can expect _____. A. steady, constant winds B. frequent rain showers and thunderstorms C. steep pressure gradients D. low relative humidity ;Practice 练习 1. The southeast trade winds actually blow toward the _____. A. southeast B. south C. east D. northwest ; Fogs 雾;A Preview of Fogs 关于雾的前瞻性学习;Terms Key to Understanding Fogs与雾有关的核心词汇;About Radiation Fog 关于辐射雾（ground fog);About Advection Fog 关于平流雾;About Steam Fog 关于蒸汽雾;About Frontal Fog 关于锋面雾（precipitation fog);Practice 练习 1. Radiation fog _____ A. always forms over water B. is formed by a temperature inversion C. is thinnest at the surface D. dissipates during the evening ;Practice 练习 2. Fog forms when the air _____ A. is 50% water saturated B. is 90% water saturated C. temperature is greater than dew point temperature D. temperature is equal to, or below dew point temperature ;Practice 练习 3. When air is at its dew point, it _____ A. has the lowest relative humidity B. will contain no additional moisture C. cannot keep up its moisture D. has a low absolute humidity ;Practice 练习 4. The passage of very cold air over much warmer water causes ________ A. frontal fog B. arctic sea smoke C. advection fog D. radiation fog ;Conclusion 总结;A Brief Summary 综述;