最新b级职称英语有效期_2017年职称英语理工类(B级)考试试题及答案2.doc

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1、最新b级职称英语有效期_2017年职称英语理工类(B级)考试试题及答案2职称英语网权威发布2017年职称英语理工类(B级)考试试题及答案2，更多2017年职称英语理工类(B级)考试试题及答案2相关信息请访问职称英语考试网。阅读判断A Great Quake Coming?Everyone who lives in San Francisco knows that earthquakes are common in the bay area and they can be devastatingIn 1906，for example，a major quake destroyed about 2

2、8，000 buildings and killed hundreds，perhaps thousands of peopleResidents now wonder when the nextBig Onewill strikeIts bound to happen somedayAt least seven active fault(断层)lines run through the San Francisco areaFaults are places where pieces of Earths crust(地壳)slide past each otherWhen these piece

3、s slip，the ground shakesTo prepare for that day, scientists are using new techniques to reanalyze the 1906 earthquake and predict how bad the damage might be when the next one happens考试大中国教育考试门户网站(wwwExamda。com)One new finding about the 1906 earthquake is that the San Andreas fault split apart faste

4、r than scientists had assumed at the timeDuring small earthquakes，faults rupture(断裂)at about 2.7 kilometers per secondDuring bigger quakes，however，ruptures can happen at rates faster than 3.5 kilometers per secondAt such high speedsmassive amounts of pressure build up，generating underground waves th

5、at can cause more damage than the quake itselfLucky for San Francisco，these pressure pulses(脉冲)travel away from the city during the 1906 eventAs bad as the damage was，it could have been far worseLooking ahead，scientists are trying to predict when the next major quake will occurRecords show that eart

6、hquakes were common before 1906Since then，the earthquake has been relatively quietPatterns in the data，however，suggest that the probability of a major earthquake striking the Bay Area before 2032 is at least 62 percentNew buildings in San Francisco are quite safe in case of future quakesStill，more t

7、han 84 per-cent of the citys buildings are old and weakAnalyses suggest that another massive earthquake would cause extensive damagePeople who live there tend to feel safe because San Francisco has remained pretty quiet for a whileAccording to the new reseaych，however，its not a matter ofif the Big One will hitIts just a matter of when16The San Francisco area is located above several active fault linesARightBWrongCNot mentioned17The 1906 earthquake in San Francisco is the most severe one in American historyARightBWrongCNot mentioned第 3 页 共 3 页