39. Which of these is NOT given as a reason for the increase in zoonotic diseases?
(A) raising animals
(B) lower disease resistance
(C) destruction of habitat
(D) international travel
答案:登入後查看
統計: A(0), B(1), C(0), D(0), E(0) #2753588
統計: A(0), B(1), C(0), D(0), E(0) #2753588