46 What does this article suggest about diseases such as smallpox or malaria?
(A) They are diseases caused by exposure to certain chemicals.
(B) They are diseases caused by various kinds of mutations in a cell’s DNA.
(C) They are diseases that cause many deaths in industrialized countries.
(D) They are diseases with a distinctive cause.
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統計: A(16), B(57), C(33), D(75), E(0) #875545
統計: A(16), B(57), C(33), D(75), E(0) #875545