英语第二题求解.

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英语第二题求解.

英语第二题求解.
英语第二题求解.
 

英语第二题求解.
1.He collected information and was able to link cases outside the area to to the polluted water .Finally he proved his idea because found an outbreak that was clearly related to chalera .
2.No,because his map helped him organized his idea .
3.Sars,Aids and birdflu .