Vocabulary plague n.瘟疫 perpetuation n.永久 rodent n.啮齿动物 endemic aa小.地方流行的 bubonic adj.腹股沟淋巴结炎的 pervasive adj.遍布的,无处不在的 epizootic ad.流行于家畜的体外寄生的 multiply vt.增生,增殖 infected n.受感染的 incubator n.孵化器 Reading Comprehension Directions: There are four suggested answers to each of the following questions. Choose the best one according to the passage you have just read 1. Rooted plague needs to be supported by an environment of A dense population B common households C dense rodent hosts living with human beings D varieties of bacteria living with human being 2. According to the passage, which of the following is NOT true about the Yersinia A Rats most commonly carry it B. It exists in the blood of many types of rodents C A rodent infection will immediately start a human plague D. The plague caused by it can be equally devastating to humans and rodents 3. Why does flea-borne plague seldom travel from one person to another A. The number of the vector is not large enough B The human body fleas are not efficient enough C. The rat fleas, the vector, are not efficient enough D The number of the human body fleas is not large enough 4. The word"regurgitate" in paragraph 4 most probably means a draw back B D reproduceVocabulary plague n. 瘟疫 perpetuation n. 永久 rodent n. 啮齿动物 endemic adj. 地方流行的 bubonic adj. 腹股沟淋巴结炎的 pervasive adj. 遍布的，无处不在的 epizootic adj. 流行于家畜的,体外寄生的 multiply vt. 增生，增殖 infected n. 受感染的 incubator n. 孵化器 Reading Comprehension Directions: There are four suggested answers to each of the following questions. Choose the best one according to the passage you have just read. 1. Rooted plague needs to be supported by an environment of ______________. A.dense population B. common households C. dense rodent hosts living with human beings D.varieties of bacteria living with human beings 2. According to the passage, which of the following is NOT true about the Yersinia pestis? A.Rats most commonly carry it. B.It exists in the blood of many types of rodents. C.A rodent infection will immediately start a human plague. D.The plague caused by it can be equally devastating to humans and rodents. 3. Why does flea-borne plague seldom travel from one person to another? A.The number of the vector is not large enough. B.The human body fleas are not efficient enough. C.The rat fleas, the vector, are not efficient enough. D.The number of the human body fleas is not large enough. 4. The word “regurgitate” in paragraph 4 most probably means_________. A.draw back B.move out C. throw up D.reproduce