Unit 2 Science Review课件.ppt

Unit 2 Science Review Word bank cell phone 手机 differ on 对…… 有分歧； 在……问题上莫衷一是 brain tumor 脑瘤 public concern 公众的关注；普遍的关注 carcinogenic /Ka:sindnik/ effect 致癌因素 causal 具有因果关系 association 联系；关联 oncologist 肿瘤专家；肿瘤医师 analog cell phone 模拟手机 sampling method 样本法；取样法 rule out 排除 certainty 可信；把握 摧射诛庄斥墓函戒黔售棱施茸瑟岭汀贫妹夸汹旬震孺季盎镊又颓籽疵孵袒Unit 2 Science Review课件Unit 2 Science Review课件 Unit 2 Science ReviewCell phone studies find no “consistent evidence” of cancer link A study of cell phones by the Swedish Radiation Protection Research Institute has found no “consistent evidence” of an increased risk of cancer from cell phone usage. Studies have differed on whether the use of mobile phones increases the risk of cancer as they have become increasingly popular. The governmental institute asked Dr. John D. Boice Jr. and Dr. Joseph K. Mclaughlin of the International Epidemiological Institute in Rockville, Maryland, USA., to assess published epidemiological research on the subject. The review looked at nine studies since 1996 that included factors such as type of phone, duration and frequency of use and brain tumor location. “No consistent evidence was observed for increased risk of brain cancer (or other forms),” the scientists said in the review, released Wednesday. 中蹋庶津讥细雾麦嚎帛豁逮莽款人砾凛蝇奔搔蛰瑞衔砂扯打姓鞍裤刨茄候Unit 2 Science Review课件Unit 2 Science Review课件 Unit 2 Science Review The agency acknowledged public concern about the issue and said many studies were still being performed and continued follow-up was needed on any possible carcinogenic effect linked to mobile phone usage. “You can never say that something is without risk, but at least we can say that there is no scientific evidence for a causal association between the use of cell phones and cancer,” said Lars-Erik Paulsson, a radiation expert with the agency. The review singled out research by Swedish oncologist Lennart Hardell, which said that long-term users of o