高中英语unit5thepowerofnature课时跟踪练一warmingup&reading_prereading

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1、Unit5Thepowerofnature课时跟踪练（一）WarmingUp&Reading-PrereadingⅠ.阅读理解ATheUSgovernmenthasrecentlyhelpedpeoplelearnmoreaboutthedangersofearthquakesbypublishingamap.Thismapshowsthechancesofanearthquakeineachpartofthecountry.Theareasofthemapwhereearthquakesaremostlikelytooccurareca

2、lledearthquakebelts.Thegovernmentisspendingagreatdealofmoneyandisworkinghardtohelptodiscovertheanswerstothesetwoquestions：Canwepredictearthquakes?Canwecontrolearthquakes?Toanswerthefirstquestion,scientistsarelookingverycloselyatthemostactivefault(断层)systemsinthecountry,su

3、chastheSanAndreasfaultinCalifornia.Afaultisabreakbetweentwosectionsoftheearth'ssurface.Thesebreaksbetweensectionsaretheplaceswhereearthquakesoccur.Scientistslookatthefaultsforchangeswhichmightshowthatanearthquakewasabouttooccur.Butitwillprobablybemanyyearsbeforewecanpredi

4、ctearthquakescorrectly.Andthecontrolofearthquakesisevenfartheraway.However,therehavebeensomeinterestingdevelopmentsinthefieldofcontrollingearthquakes.ThemostinterestingdevelopmentconcernstheRockyMountainArsenalearthquakes.Herewaterwasputintoalayerofrocks4,000metresbelowth

5、esurfaceoftheground.Shortlyafterthisinjection(注射)ofwater,therewasasmallnumberofearthquakes.Scientistshavedecidedthatthewaterwhichwasinjectedintotherocksworkedlikeoiloneachother.Whenthewater“oiled”thefault,thefaultbecameslipperyandtheenergyofanearthquakewasgivenout.Scienti

6、stsarestillexperimentingatthesiteoftheseearthquakes.Theyhaverealizedthatthereisaconnectionbetweentheinjectionofthewaterandtheearthquakeactivity.Theyhavesuggestedthatitmightbepossibletousethisknowledgetopreventverybig,dangerousearthquakes,thatis,scientistscouldinjectsomeki

7、ndoffluidlikewaterintofaultsandchangeonebigearthquakeintoanumberofsmall,harmlessearthquakes.语篇解读：为了提高人们对地震的防范意识，美国政府加大了在防震、预测方面的投入，他们甚至在努力采取措施控制地震的发生。1．Earthquakesbeltsare________.A．mapsthatshowwhereearthquakesarelikelytooccurB．zoneswithahighprobabilityofearthquakesC．brea

8、ksbetweentwosectionsoftheearth'ssurfaceD．thetwolayersofearthalongafault解析：选B　细节理解题。根据第一段的第三句可知，地