問題詳情

A remote tribe, known as the Yanomami, in the Venezuelan Amazon appears to be resistant to modern antibiotics even though its members have had barely any contact with the outside world. Scientists found that the tribespeople's microbiome — the community of bacteria, fungi and viruses that live in and on the body — was —21— seen in comparison communities of rural Venezuelans and Malawians. Their microbiome was twice as diverse as observed in a reference group of Americans. The remote villagers are generally healthy, and that may be —22— a microbiome that "contains perhaps the highest levels of bacterial diversity ever reported in a human group," said the study in the journal Science Advances.—23— the Yanomami had some T-shirts, machetes and metal cans, suggesting some limited contact with civilization，they have not been exposed to the many elements of contemporary life that can cut down on microbes, such as eating processed foods, taking antibiotics, and delivering babies by Caesarean section.Scientists expected to find some resistance to antibiotics in the population, because these resistance genes have existed in soil bacteria for millions of years or more, so it makes sense that they would —24— into people, too, even without antibiotic use. What came as a surprise was the discovery that the tribespeople had nearly 30 antibiotic resistant genes that were never before known to science. Even more, these genes were resistant to some of the world's most recently developedsynthetic antibiotics.Widespread use of antibiotics in people and livestock has raised concern about an approaching era when antibiotics may not work at all, —25— the return of stubborn infections that turn fatal instead of treatable. Already, drug-resistant superbugs are on the rise, particularly in hospitals. The latest research, thus, emphasizes the need to ramp up our research for new antibiotics because otherwise we're going to lose this battle against infectious diseases.
21.
(A) far more diverse than
(B) the most diverse among
(C) none the more diverse for
(D) not so diverse as

參考答案

答案：A
難度：適中0.470588
統計：A(8),B(2),C(2),D(5),E(0)

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