题目内容:
Whatdowelearnaboutthemodelfromthepassage? A.ItwasdevelopedbytheWorldTradeOrganization.
B.IthasonlybeenusedinthreeEuropeancountries.
C.Itweighedthecostsoftestingpeopleandthevaluesoflivesextended.
D.ItwasinventedbyDr.VenkateshandDr.Becker.
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答案解析: