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年职称英语考试完形填空突击训练附答案20XX年职称英语考试完形填空突击训练附答案 family andfriends arehidden treasures.seek themand enjoythe riches.以下是为大家搜索的20XX年完形填空突击训练附答案,希望能给大家带来帮助!更多精彩内容请及时关注我们! An avalancheis asudden andrapid flowof snow,often mixedwith airand water,down amountainside.Avalanches are1the biggestdangers inthe mountainsfor bothlife andproperty. All avalanchesare causedby anover-burden ofmaterial,typically snowpack,that istoo massiveand unstablefor theslope2supports it.Determining the critical load,the amountof over-burden whichis3an avalanche,4a plextask involvingthe evaluationof anumber offactors. Terrain slopesflatter than25degrees orsteeper than60degrees typicallyhave alow5of avalanche.Snow doesnot6significantly onsteep slopes;also,snow doesnot7easily onfiat slopes.Human-triggered avalancheshave thegreatest incidencewhen thesnows angleof rest1is835and45degrees;thecriticalangle,the angleat whichthe humaninc...。