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约510字。
　　Module 3 The Violence of Nature
　　Reading and vocabulary---教案
　　Step 1 LEAD-IN
　　As you know, the condition of weather is changing badly. Please name the disasters of nature. The pictures, includes flood, drought, fire, landslide, earthquarricane, typhoon, tornado, thunderstorm.
　　Step 2 while-reading
　　Questions-asking
　　1. Read this passage aloud and answer the following questions.
　　How can tornadoes destroy houses?
　　They can destroy houses, but leave
　　the furniture inside exactly where it was.
　　2). Where do tornadoes mainly occur?
　　In the US, with area from Texas in the
　　Southeast to South Dakota in the north
　　3) Do a thorough reading and fill in the blanks.
　　A tornado is a _____ ______of air from a__________ to the ground. On (the) average, there are ______ tornadoes each year, ________ about 80______ and 1500_________. The worst occurred in____, _______ three US states and making 700___________ and 2700________.
　　The key: rotating n thunderstorm 800 causing
　　Deaths injuries 1925 affecting dead/ killed injured
　　Activity2 What is a hurricane?