Английский язык

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Английский язык, опубликовано 2018-08-22 23:55:20
Аватар
Английский язык, опубликовано 2018-08-22 23:55:20
Перевод на русский пож What causes earthquakes? 01.1.r o1d earth stretc hes and deforms its rock layers at a rate too fast for themselves quitietly. Scientists are not su/e whether the eart his growing bigger and stretching crustàlrocks,orshrinking to wrinkle them like dried appleskins.In any cmse,therearenian#r:asonsforthesqueezingand tw isting ofthe rocks thatcause such trouble. Chem icaland radioactivereactionsm elttheinteriorm aterialscausing pressureagainsttheoverlying rocks.M ostim portantm ay be the w eightof eaG h m aterialm oved from placeto placeby the ruslting waters of rivers.This happens slow ly,butthere is a11thetimeintheworld,mldafterm illionsofyears theweightof m aterialbecom esvery great. Breaking takes place along zones of weakness called faults.Oneside of the rock m ovespastthe other,sidew aysor up ordown,sliding and grinding along the fault untilthe tension is released. Therock then com esto restin itsnew position,to stay untiltension builds up again.The following two exam ples m ay dem onstrate the disaster. 11 On A pril18, 1906,one of the greatest shocks in A m erican history struck San Francisco, It 150 happened at 5:12 on a weekday m orning w hen the downtow n business districtw as deserted and streets were empty.The death tollwas between 452 and 498 persons. A ctually the quake buckled and rolled over a 200-m i1e stretch of the San A ndreas fault. Altogether,âtleast 700 persons were killed. RqnFranciscosdnmagewasestimatedat$400million ata tim eofs-centbeerand ls-centprim ebeef. W hat if a quake of sim ilar strength struck at noon on a week-day? Itis a chilling possibility. Can citieseventually bebuiltso theyre quakeproof? Yes,say the experts. Earthquakednmagetostructureshasbeenpainstakingly studied during thepasthalfcentury. RThere is no reason for a fifty-storey building to be less safe than a five-storey building if it is constructed properlyysaysDr.George W .H ousner,Caltech professorofcivilengineering.Finally, willit eventually be possible to predict quakes? An internationalstudy is now in progress in an effort to answer this question. GW ith increasing inform ation about the eazth m ovem ents a1lover the world,Dr.Benioff says, d w ould tellus when and where the breaking point hasbeen reached- It cant be concluded as yet that earthqultktls com ein cyclesbecausethey haventbeen observtltl orrecorded long enough.III r 3. The possibility ofconstructing quake-proof
Аватар
Английский язык, опубликовано 2018-08-22 23:55:19