新东方在线[www.kooleam.com]CET.4高分班网络课堂电子教材系列阅读CET4阅读高分班电子教材主讲：陈科欢迎使用新东方在线电子教材新东方在线www.koolearn.com/ww.koolearn.com新东方在线教材说明：本电子教材wod文档下面的页码跟教材完全一样，学员只需根据老师说的多少页找到相应的页面学习即可。请提前预习、认真学习、及时复习，祝广大学子考试取得成功！电子教材系列第一部分阅读理解全真试题Unit 1Part II Reading Comprehension(35 minutes)Directions:There are 4 passages in this part.Each passage is followed by some questions orunfinished statements.For each of them there are four choices marked A),B),C)and D).You should decide on the best choice and mark the corresponding letter onthe Answer Sheet with a single line through the center.Passage OneQuestions 21 to 25 are based on the following passage.The biggest safety threat facing airlines today may not be a terrorist with a gun,but the manwith the portable computer in business class.In the last 15 years,pilots have reported well over100 incidents that could have been caused by electromagnetic interference.The source of thisinterference remains unconfirmed,but increasingly,experts are pointing the blame at portableelectronic device such as portable computers,radio and cassette players and mobile telephones.RTCA,an organization which advises the aviation (industry,has recommended that allairlines ban (E)such devices from being used during "critical"stages of flight,particularlytake-off and landing.Some experts have gone further,calling for a total ban during all flights.Currently,rules on using these devices are left up to individual airlines.And although someairlines prohibit passengers from using such equipment during take-off and landing,most arereluctant to enforce a total ban,given that many passengers want to work during flights.The difficulty is predicting how electromagnetic fields might affect an aircraft's computersExperts know that portable device emit radiation which affects those wavelengths which aircraftuse for navigation and communication.But,because they have not been able to reproduce theseeffects in a laboratory,they have no way of knowing whether the interference might be dangerousor not.The fact that aircraft may be vulnerable(易受损的)to interference raises the risk thatterrorists may use radio systems in order to damage navigation equipment.As worrying,though,isthe passenger who can't hear the instructions to tum off his radio because the music's too loud.21.The passage is mainly about1A)a new regulation for al airlinesB)the defects of electronic devicesC)a possible cause of aircraft crashesD)effective safety measures for air flight22.What is said about the over 100 aircraft incidents in the past 15 years?A)They may have been caused by the damage to the radio systems.B)They may have taken place during take-off and landing.C)They were proved to have been caused by the passengers'portable computers.D)They were suspected to have resulted from electromagnetic interference.23.Few airlines want to impose a total ban on their passengers using electronic devices becauseA)they don't believe there is such a danger as radio interferenceB)the hammful effect of electromagnetic interference is yet to be provedC)most passengers refuse to take a plane which bans the use of radio and cassette playersD)they have other effective safety measures to fall back on24.Why is it difficult to predict the possible effects of electromagnetic fields on an airplane'scomputers？A)Because it is extremely dangerous to conduct such research on an airplane.B)Because it remains a mystery what wavelengths are liable to be interfered with.C)Because research scientists have not been able to produce the same effects in labs.D)Because experts lack adequate equipment to do such research.25.It can be inferred from the passage that the authorA)is in favor of prohibiting passengers'use of electronic devices completelyB)has overestimated the danger of electromagnetic interferenceC)hasn't formed his own opinion on this problemD)regards it as unreasonable to exercise a total ban during flightPassage TwoQuestions 26 to 30 are based on the following passage.The rise of multinational corporations(跨国公司)，global marketing,new communicationstechnologies,and shrinking cultural differences have led to an unparalleled increase in globalpublic relations or PR.Surprisingly,since modern PR was largely an American invention,the U.S.leadership inpublic relations is being threatened by PR efforts in other countries.Ten years ago,for example,the world's top five public relations agencies were American-owned.In 1991,only one was.TheBritish in particular are becoming more sophisticated and creative.A recent survey found thatmore than half of all British companies include PR as part of their corporate planningactivities,compared to about one-third of U.S.companies.It maynot be long before London replaces New York as the capital of PR.2