Itcanbeinferredfromthepassagethatallofthefollowingarewaysofproducingnewstr ainsofinfluenzavirusesEXCEPT______.
A.twoinfluenzavirusesinthesameanimalrecombining
B.animalvirusesrecombiningwithhumanviruses
C.twoanimalvirusesrecombininginoneanimal
D.twoanimalvirusesrecombininginahuman
正确答案：D[解析]见第三段，根据句意可知选项D为正确答案。
