4．Cell phones：Is there a cancer link？
worrying about the possibility that phones，power lines and Wi-Fi could be responsible for a range of illnesses，from rashes （疹子）to brain tumors．
Some say there is evidence to support the growing anxieties．David Carpenter，a professor of environmental health sciences at the university at Albany，in New York，thinks there's a greater than 95percent chance that power lines can cause childhood leukemia （a kind of blood disease）．Also there's a greater than 90percent chance that cell phones can cause brain tumors．"It's clear now that there's a real risk，"said Carpenter．
But others believe these worries caused by some experts'warnings are not justified （驗證）．Dr Martha Linet，head of radiation epidemiology（流行病學）at the US National Cancer Institute，has looked at the same research as Carpenter but has reached a different conclusion．"I don't support warning labels （標簽） for cell phones，"said Linet．"We don't have the evidence that there's much danger．"
Studies so far suggest a weak connection between EMFs （電磁場）and illness-so weak that it might not exist at all．A multinational investigation（調查） of cell phones and brain cancer，in 13countries outside the US，has been under way for several years．Its funded（provide money） in part by the European Union，in part by a cell phone industry group．The final report should come out later this year，but data （數(shù)據）so far don't suggest a strong link between cell phone use and cancer risk．
21．From the passage we can learn that some people are worried becauseC．
A．they have evidence that the use of cell phones can lead to cancer
B．they feel surprised and alarmed about cell phone use
C．some experts have given warnings
D．cell phones are responsible for brain tumors
22．By saying"I don't support warning labels for cell phones"，Dr Martha Linet thinks thatA．
A．the connection between cell-phones and cancer has not been proved．
B．cancer-warning labels should be on cell phones
C．there is a link between cell phones and cancer
D．cell phones have nothing to do with cancer at all．
23．Which of the following best describes the attitude of the author towards the debate？B
A．Optimistic． B．Objective（客觀的）． C．Opposite． D． Hopeless．
分析 本文屬于記敘文閱讀，文章主要向我們講述的是關于手機等的輻射是否對人體有害的各方觀點，有人說電源線會導致兒童白血病，也有人認為這些擔心是不合理的．
解答 21．C 推理判斷題．根據文中第二段Also there's a greater than 90percent chance that cell phones can cause brain tumors．"It's clear now that there's a real risk，"said Carpenter．可知有些專家明確認為輻射會致病，并警告人們．故選C．
22．A 細節(jié)理解題．根據第四段最后一句The final report should come out later this year，but data （數(shù)據）so far don't suggest a strong link between cell phone use and cancer risk．可知該專家認為沒有任何證據可以證明輻射可以對人體造成傷害．所以這些擔心是沒有必要的，故選A．
23．B 推理判斷題．通讀全文可知文中作者并沒有明確表明自己贊成還是反對的觀點，所以是比較客觀地看待該問題．故選B．
點評 考查學生的細節(jié)理解和推理判斷能力．做細節(jié)理解題時一定要找到文章中的原句，和題干進行比較，再做出正確選擇．在做推理判斷題時不要以個人的主觀想象代替文章的事實，要根據文章事實進行合乎邏輯的推理判斷．
