单选题 There is a controversy even among doctors as to whether this disease is contagious or not.
【正确答案】 D
【答案解析】[解析] contagious的意思是“接触传染的,有传染性的”。communicable可传达的,会传染的;incisive直接的,尖锐的;infertile不能生育的,贫瘠的,不毛的;allergic过敏的。故选D项。