高中英语（配人教版，必修1）同步课件 Unit 4.ppt

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1、Unit4EarthquakesAnearthquakeisashakingofthegroundcausedbythesuddenbreakingandshiftingoflargesectionsofEarth'srockyoutershell.Earthquakesareamongthemostpowerfuleventsontheearth,andtheirresultscanbeterrifying.Theforceofanearthquakedependsonhowmuchrockbreaksandhowfaritshifts

2、.Powerfulearthquakescanshakefirmgroundviolentlyforgreatdistances.Duringminorearthquakes，thevibrationmaybenogreaterthanthevibrationcausedbyapassingtruck.Onaverage,apowerfulearthquakeoccurslessthanonceeverytwoyears.Atleast40moderateearthquakescausedamagesomewhereintheworlde

3、achyear.About40,000to50,000smallearthquakes—largeenoughtobefeltbutnotdamaging—occurannually.Tasks：1．佳句仿写①…calledtsunamis(海啸)…Thegroup____________.(被称作“甲壳虫”的乐队很受欢迎)【答案】called“Beatles”isverypopular②Instead…Wewon'thaveteainthehouse.____________.(我们将在花园里而不是在室内喝茶)。【答案】Instead,

4、we'llhaveteainthegarden2．句子翻译(将黑体句子译成汉语)【答案】海底威力巨大的地震能够引起被称为海啸的一系列具有毁坏性的巨浪，能够淹没海岸许多英里。