文档介绍：Unit8NaturalDisastersInthisunityouwill:,andwehumanscantakemeasurestopreventthem;;;;-theme-relatedaudioandvideomaterials;-municationSkillsPartVAssessmentLogPartITheme-??Lead-inquestions:Unit8》PartI》SectionI》Lead-inquestionsWordBankstall/stɔːl/;使失速plume/pluːm/(如烟云,雪尘等);火山灰erupt/ɪˈrʌpt//ˈhæzəd/;危害物seismic/ˈsaɪzmɪk//kəʊd/》PartI》SectionI》WordBankUnit8》PartI》SectionI》WordBankphase/feɪz/;火山岩浆avalanche/ˈævəlɑːnʃ/;瓦砾NotesUnit8》PartI》SectionI》NotesTheUnitedStatesGeologicalSurvey(USGS),itsnaturalresources,,concerningbiology,geography,geology,-》PartI》SectionI》,.(Nobodyhasseenanythinglikeitin9,000years.)FF________(Theyarelookingatabout170thatcouldpotentiallyerupt.)’,