It is the prevention of disease_____ its successful treatment that has led to the rapid increase of the world’s population.A.more thanB.rather thanC.other thanD.less than
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B解析考查than短语。A不仅仅；超过；分词；B代替，而不是；C除…之外；D少于…；结合句意可知B正确。句意：不是成功的治疗疾病而是预防疾病导致了世界人口的迅速增加。