- 問題詳情:JohnSnowwasawell-knowndoctorinLondon—soexpert,indeed,1.______heattendedQueenVictoria2.______herpersonalphysician.Buthebecameinspiredwhenhethoughtabouthelpingordinarypeople3.______(expose)tocholera,4.______wasthedeadlydiseaseofitsday.Manythou...
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