Unit 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 v.结束conclusion n.结论draw a conclusion得出结论analyse v.分析infect v.传染infections v.传染的cholera adj.霍乱defeat v. 打败expert adj.熟练的attend v.照顾physician n.医生expose.暴露expose...to使显露deadly adj.致命的cure n.治愈...
