2023年广东公共英语考试真题卷(5).pdf

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1、2023 年广东公共英语考试真题卷（5）本卷共分为 1 大题 50 小题，作答时间为 180 分钟，总分 100分，60 分及格。一、单项选择题（共 50 题，每题 2 分。每题的备选项中，只有一个最符合题意）1.The biggest safety threat facing airlines today may not be a terrorist with a gun,but the man with the portable computer in business class.In the last 15 years,pilots have reported well over 10

2、0 incidents that could have been caused by electromagnetic interference.The source of this interference remains unconfirmed,but increasingly,experts are pointing the blame at portable electronic devices such as portable computers,radio and cassette players and mobile telephones.RTCA,an organization

3、which advises the aviation industry,has recommended that all airlines ban such devices from being used during critical stages of flight,particularly take-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 in

4、dividual airlines.And although some airlines prohibit passengers from using such equipment during take-off and landing,most are reluctant to enforce a total ban,given that many passengers want to work during flights.The difficulty is predicting how electromagnetic fields might affect an aircrafts co

5、mputers.Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication.But,because they have not been able to reproduce these effects in a laboratory,they have no way of knowing whether the interference might be dangerous or not.

6、The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment.As a result,loud music sound makes the passenger unable to hear the instructions turning off his radio,this is the most worrying things to airlines.F

7、ew airlines want to impose a total ban on their passengers using electronic devices because _.Athey have other effective safety measures to fall back on Bthe harmful effect of electromagnetic interference is yet to be proved Cmost passengers refuse to take a plane which bans the use of radio and cas

8、sette players Dthey dont believe there is such a danger as radio interference 2.Some animals apparently can resist cancer by strengthening their immune system in preparation for winter,Johns Hopkins researchers said on Wednesday.The scientists said their study is the first to show that the central n

9、ervous system,reacting to environmental changes,may spark changes in the bodys immune system that control the growth of tumors.They said if that is the ease,a better understanding of how the process works eventually could lead to new cancer treatments.Dr.Randy Nelson,an associate professor of psycho

10、logy at Hopkins,stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day,the animals immune system and cancer.More work also would be needed to show that the findings could be applied to human cancer.Dr.Faye Austin,

11、an immunologist with the National Cancer Institute in Bethesda,said:Its a very intriguing observation that the length of exposure to light can affect the growth of a tumour.But I think that the draws really need further work to clarify the mechanics.But Austin said the findings were surprising and i

12、mportant,only because they open up a new approach for research.Studies showed that stress weakened the immune system in animals.They figured that because winter is stressful,the season probably causes exertion(影 响)on the immune system.The researchers reasoned that animals that compensated by boostin

13、g(促 进)their immune systems as winter approached would have a better chance of surviving and producing offspring.In the same way that animals have evolved to select the best time to breed,it struck me that animals ought to be able to predict when conditions would be challenging immunologically.Nelson

14、 said.Animals can strengthen their immune system in preparation for winter because _.Awhen season changes,the central nervous system reacts to environment and that sparks changes in the bodys immune system Banimals have shorter exposure to light in winter than in summer Canimals have evolved to sele

15、ct the best time to breed and be able to predict the change of conditions Dall of the above 3.Some animals apparently can resist cancer by strengthening their immune system in preparation for winter,Johns Hopkins researchers said on Wednesday.The scientists said their study is the first to show that

16、 the central nervous system,reacting to environmental changes,may spark changes in the bodys immune system that control the growth of tumors.They said if that is the ease,a better understanding of how the process works eventually could lead to new cancer treatments.Dr.Randy Nelson,an associate profe

17、ssor of psychology at Hopkins,stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day,the animals immune system and cancer.More work also would be needed to show that the findings could be applied to human cancer.D

18、r.Faye Austin,an immunologist with the National Cancer Institute in Bethesda,said:Its a very intriguing observation that the length of exposure to light can affect the growth of a tumour.But I think that the draws really need further work to clarify the mechanics.But Austin said the findings were su

19、rprising and important,only because they open up a new approach for research.Studies showed that stress weakened the immune system in animals.They figured that because winter is stressful,the season probably causes exertion(影 响)on the immune system.The researchers reasoned that animals that compensa

20、ted by boosting(促 进)their immune systems as winter approached would have a better chance of surviving and producing offspring.In the same way that animals have evolved to select the best time to breed,it struck me that animals ought to be able to predict when conditions would be challenging immunolo

21、gically.Nelson said.Which statement can be the best title for this article ADr.Randy Nelson and His New Findings.BAnimals Resistance to Cancer.CWinter and Animals Immune System.DA Light in the Cancer Darkness.4.The biggest safety threat facing airlines today may not be a terrorist with a gun,but the

22、 man with the portable computer in business class.In the last 15 years,pilots have reported well over 100 incidents that could have been caused by electromagnetic interference.The source of this interference remains unconfirmed,but increasingly,experts are pointing the blame at portable electronic d

23、evices such as portable computers,radio and cassette players and mobile telephones.RTCA,an organization which advises the aviation industry,has recommended that all airlines ban such devices from being used during critical stages of flight,particularly take-off and landing.Some experts have gone fur

24、ther,calling for a total ban during all flights.Currently,rules on using these devices are left up to individual airlines.And although some airlines prohibit passengers from using such equipment during take-off and landing,most are reluctant to enforce a total ban,given that many passengers want to

25、work during flights.The difficulty is predicting how electromagnetic fields might affect an aircrafts computers.Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication.But,because they have not been able to reproduce these

26、 effects in a laboratory,they have no way of knowing whether the interference might be dangerous or not.The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment.As a result,loud music sound makes the passen

27、ger unable to hear the instructions turning off his radio,this is the most worrying things to airlines.Why is it difficult to predict the possible effects of electromagnetic fields on an airplanes computers ABecause it is extremely dangerous to conduct such research on an airplane.BBecause experts l

28、ack adequate equipment to do such research.CBecause research scientists have not been able to produce the same effects in labs.DBecause it remains a mystery what wavelengths are liable to be interfered with.5.Space is a dangerous place,not only because of meteors(流星)but also because of rays from the

29、 sun and other stars.The atmosphere again acts as our protective blanket on earth.Light gets through,and this is essential for plants to make the food which we eat.Heat,too,makes our environment endurable.Various kinds of rays come through the air from outer space,but enormous quantities of radiatio

30、n(辐射)from the sun are screened off.As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft,if they are inside,do prevent a lot of radiation damage.Radiation is the greatest known danger to explorers in space.The unit of radiation i

31、s called rem.Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged;the figure of 60 rems has been agreed on.The trouble is that it is extremely difficult to be sure about radiation damagea person may feel perfectly well,but the cells of his

32、or her sex organs may be damaged,and this will not be discovered until the birth of deformed(畸形的)children or even grandchildren.Missions of the Apollo flights have had to cross belts of high radiation and,during the outward and return journeys,the Apollo missions have been quite short.We simply do n

33、ot know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere,working in space laboratory.Rugs might help to decrease the damage done by radiation,but no really effective ones have been found so far.The best title for this passage would be _.AResea

34、rch on Radiation BEffects of Space Radiation CImportance of Protection against Radiation DThe Atmosphere and Our Environment 6.The biggest safety threat facing airlines today may not be a terrorist with a gun,but the man with the portable computer in business class.In the last 15 years,pilots have r

35、eported well over 100 incidents that could have been caused by electromagnetic interference.The source of this interference remains unconfirmed,but increasingly,experts are pointing the blame at portable electronic devices such as portable computers,radio and cassette players and mobile telephones.R

36、TCA,an organization which advises the aviation industry,has recommended that all airlines ban such devices from being used during critical stages of flight,particularly take-off and landing.Some experts have gone further,calling for a total ban during all flights.Currently,rules on using these devic

37、es are left up to individual airlines.And although some airlines prohibit passengers from using such equipment during take-off and landing,most are reluctant to enforce a total ban,given that many passengers want to work during flights.The difficulty is predicting how electromagnetic fields might af

38、fect an aircrafts computers.Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication.But,because they have not been able to reproduce these effects in a laboratory,they have no way of knowing whether the interference might

39、be dangerous or not.The fact that aircraft may be vulnerable to interference raises the risk that terrorists may use radio systems in order to damage navigation equipment.As a result,loud music sound makes the passenger unable to hear the instructions turning off his radio,this is the most worrying

40、things to airlines.It can be inferred from the passage that the author _.Ais in favor of prohibiting passengers use of electronic devices completely Bregards it as unreasonable to exercise a total ban during flight Chasnt formed his own opinion on this problem Dhas overestimated the danger of electr

41、omagnetic interference 7.BPart A/BI You will hear 10 short dialogues.For each dialogue,there is one question and four possible answers.Choose the correct answer-A,B,C or D,and mark it in your test booklet.You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE.Now loo

42、k at Question 1./IWhat does the woman think of the price AReasonable.BCheap.CExpensive.DUnacceptable.8.BPart A/BI You will hear 10 short dialogues.For each dialogue,there is one question and four possible answers.Choose the correct answer-A,B,C or D,and mark it in your test booklet.You will have5 se

43、conds to answer the question and you will hear each dialogue ONLY ONCE.Now look at Question 1./IWhat will the speakers do AHave dinner.BGo to the laboratory.CHave classes.DGo shopping.9.BPart A/BI You will hear 10 short dialogues.For each dialogue,there is one question and four possible answers.Choo

44、se the correct answer-A,B,C or D,and mark it in your test booklet.You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE.Now look at Question 1./IWhat does the man ask the woman to do ASend a note to Professor Johnson.BWait a minute to see Professor Johnson.CWrite a

45、note to Professor Johnson.DListen to Professor Johnsons speech.10.BPart A/BI You will hear 10 short dialogues.For each dialogue,there is one question and four possible answers.Choose the correct answer-A,B,C or D,and mark it in your test booklet.You will have5 seconds to answer the question and you

46、will hear each dialogue ONLY ONCE.Now look at Question 1./IWhy cant the man ring the woman AHe doesnt have a telephone.BHis telephone was stolen.CHis telephone doesnt work.DHe doesnt have time.11.BPart A/BI You will hear 10 short dialogues.For each dialogue,there is one question and four possible an

47、swers.Choose the correct answer-A,B,C or D,and mark it in your test booklet.You will have5 seconds to answer the question and you will hear each dialogue ONLY ONCE.Now look at Question 1./IWhat is the possible relationship between the speakers ASalesman and customer.BPost office clerk and customer.C

48、Teacher and student.DRailway station clerk and passenger.12.What are the two speakers talking about APlans for the weekend.BA wonderful movie.CSome reference books.DThe graduation paper.13.What does the man thinking people now AIf something seems far better than expected,it is probably not good.BIf

49、something seems far better than expected,grab it while you can.CIf something seems far better than expected,it must be not good.DIf something seems far better than expected,it must be very good.14.What does Mary usually do on Saturday afternoon AShe reads books.BShe goes to the park.CShe does some e

50、xercises.DShe watches TV.15.How does the man feel about driving to work ARelaxed BTired CBored DLonely 16.What are the man and the woman talking about AColors.BSweaters.CFilms.DMusic.17.IQuestions 11-13 are based on the following dialogue./IWhy does the man talk with Sandra AHe is not satisfied with