Someyearsagoindustrieshadmorefreedomthantheyhavenow，andtheydidnotneedtobeascarefulastheymusttoday.Theydidnotneedtoworryalotaboutthesafetyofthenewproductsthattheydeveloped.Theydidnothavetopaymucha
Someyearsagoindustrieshadmorefreedomthantheyhavenow，andtheydidnotneedtobeascarefulastheymusttoday.Theydidnotneedtoworryalotaboutthesafetyofthenewproductsthattheydeveloped.Theydidnothavetopaymuchattentiontothehealthandsafetyofthepeoplewhoworkedforthem.Oftennewproductsweredangerousforthepeoplewhousedthem;oftenconditionsintheworkplacehadverybadeffectsonthehealthoftheworkers.
Ofcoursesometimestherewererealdisasterswhichattractedtheattentionofgovernmentsandwhichshowedtheneedforchanges.Alsoscientistswhoweredoingresearchintothehealthofworkerssometimesproducedinformationwhichgovernmentscouldnotignore.Atsuchtimes,therewereinquiriesintothecausesofthedisastersortheproblems.Newsafetyruleswereoftenintroducedasaresultoftheseinquiries;however,thenewrulescametoolatetoprotectthepeoplewhodiedorwhobecameseriouslyill.
Todaymanygovernmentshavespecialdepartmentswhichprotectcustomersandworkers.IntheU.S.,forexample,thereisadepartmentwhichtestsnewairplanesandgiveswarningsaboutpossibleproblems.Italsomakestherulesthataircraftproducersmustfollow.Anotherdepartmentcontrolsthefoodsanddrugsthatcompaniessell.Athirddepartmentlooksattheplaceswherepeoplework,andthenreportsanycompaniesthatarebreakingthelawswhichprotectthehealthandsafetyofworkers.Ofcourse,newgovernmentdepartmentsandnewlawscannotpreventeveryaccidentorillness,buttheyarehavingsomegoodresults.Ourworkplacesaresaferandcleanerthanbefore.Theplanesandcarswhichweusefortravelarebetter.Producersarethinkingmoreaboutthesafetyandhealthofthepeoplewhobuyandusetheirproducts.
51.Themaintopicofthepassageis______.
A.conditionsintheworkplace B.thefreedomofindustriesinthepast
C.changesinindustrialproduction D.thesafetyandhealthofworkersandcustomers
52.Itcanbeinferredfromthepassagethatinthepast______.
A.workersoftengotillbecauseofthepoorworkingconditions
B.companieswerefreetoputoutanyproductstheywantedto
