Book 5Unit 1characteristic n. 特征；特性radium n. 镭painter n. 画家；油漆匠*put forward 提出scientific adj. 科学的*conclude vt. & vi.结束；推断出conclusion n.结论；结束*draw a conclusion得出结论analyse vt.分析#infect vt.传染；感染#infections v.传染的#cholera adj.霍乱*defeat vt. 打败；战胜；使受挫 n.失败expert adj.熟练的；经验或知识丰富的 n.专家；行家*attend vt.照顾；护理；出席；参加physician n.医生；内科医师*expose vt.暴露；揭露；使曝光*exposeto使显露；暴露#deadly adj.致命的*cure n.治愈；痊愈 vt.治愈；治疗#outbreak n.爆发；发作（尤指疾病或战争）*challenge n
