![Nooneunderstoodcholeraandeverytimeitcame,thousandsdied....]( "Nooneunderstoodcholeraandeverytimeitcame,thousandsdied....")
- 問題詳情：Nooneunderstoodcholeraandeverytimeitcame,thousandsdied.Neitheritscause61.______itscurewasunderstood.QueenVictoria'sdoctor,JohnSnow,wantedtofind62.______howitwascaused.WhenthediseasecametoLondonagainin1854,Snownoticedthatmostofthe500people63....
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