問題詳情

請依下文回答第 47～50 題，各題答案內容不重複That so many bacteria have become drug-resistant is testimony to the microbes’ toughness. However, here istougher: some bacteria actually eat antibiotics for breakfast. 47To study bacteria with varying degrees of prior exposure to artificial antibiotics, a research team sampled dirt fromeleven disparate locations. 48 All eleven soil types sheltered bacteria that could grow on antibiotics—includingcommonly prescribed ones—as their only source of carbon. 49To be able to eat antibiotics, those bacteria must obviously have a high degree of resistance. Indeed, they tolerateantibiotics at an extremely concentrated level. The poison-munching bacteria are not harmful to people. 50 Becausebacteria swap genes freely, scientists warn that the soil dwellers might be able to transfer the genes for super-resistance totheir infective cousins.
47
(A) Others can be easily destroyed by antibiotics.
(B) Fortunately, not many can be found in the soil.
(C) Nevertheless, some of them have close relatives that are harmful to people.
(D) Moreover, such super-tough bacteria are naturally widespread in the soil.

參考答案

答案：D
難度：困難0.320755
統計：A(12),B(9),C(9),D(17),E(0)

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