問題詳情
39. What would be the most effective method of reducing the incidence of blood flukes in a human population?
(A) Reduce the mosquito population.
(B) Reduce the freshwater snail population.
(C) Purify all drinking water.
(D) Avoid contact with rodent droppings.
(E) Carefully wash all raw fruits and vegetables.
(A) Reduce the mosquito population.
(B) Reduce the freshwater snail population.
(C) Purify all drinking water.
(D) Avoid contact with rodent droppings.
(E) Carefully wash all raw fruits and vegetables.
參考答案
答案：B
難度：非常困難0.117647
統計：A(3),B(2),C(2),D(2),E(1)
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